summaryrefslogtreecommitdiff
diff options
context:
space:
mode:
authorJohnathan Corgan <johnathan@corganlabs.com>2015-04-06 20:22:14 -0700
committerJohnathan Corgan <johnathan@corganlabs.com>2015-04-06 20:27:38 -0700
commit13031bba1d7310c2b70830eb5a9a23e63808acc9 (patch)
tree44bd9ef2554ee7a925434fb802ccf5e8d1e65fcb
parentd4b38e890c5ba3422160ba1ca5db3f55762eeb34 (diff)
digital: adds corr_est_cc correlation estimator block
This commit is almost entirely based on the correlate_and_sync_cc update by Nick Foster <bistromath@gmail.com> and Andy Walls <andy@silverblocksystems.net>, but has been renamed to corr_est_cc in order to be included in the 3.7 API without compatibility issues.
Diffstat
-rw-r--r--gr-digital/examples/CMakeLists.txt1
-rw-r--r--gr-digital/examples/demod/test_corr_est.grc3500
-rw-r--r--gr-digital/grc/digital_block_tree.xml4
-rw-r--r--gr-digital/grc/digital_corr_est_cc.xml41
-rw-r--r--gr-digital/grc/digital_modulate_vector.xml34
-rw-r--r--gr-digital/include/gnuradio/digital/CMakeLists.txt4
-rw-r--r--gr-digital/include/gnuradio/digital/corr_est_cc.h112
-rw-r--r--gr-digital/include/gnuradio/digital/modulate_vector.h70
-rw-r--r--gr-digital/lib/CMakeLists.txt2
-rw-r--r--gr-digital/lib/corr_est_cc_impl.cc282
-rw-r--r--gr-digital/lib/corr_est_cc_impl.h64
-rw-r--r--gr-digital/lib/modulate_vector.cc70
-rw-r--r--gr-digital/swig/digital_swig.i7
13 files changed, 4188 insertions, 3 deletions
diff --git a/gr-digital/examples/CMakeLists.txt b/gr-digital/examples/CMakeLists.txt
index 8faad96708..fa15501936 100644
--- a/gr-digital/examples/CMakeLists.txt
+++ b/gr-digital/examples/CMakeLists.txt
@@ -82,6 +82,7 @@ install(
demod/dpsk_loopback.grc
demod/gfsk_loopback.grc
demod/test_corr_and_sync.grc
+ demod/test_corr_est.grc
demod/uhd_corr_and_sync_tx.grc
demod/uhd_corr_and_sync_rx.grc
DESTINATION ${GR_PKG_DIGITAL_EXAMPLES_DIR}/demod
diff --git a/gr-digital/examples/demod/test_corr_est.grc b/gr-digital/examples/demod/test_corr_est.grc
new file mode 100644
index 0000000000..6237565a4b
--- /dev/null
+++ b/gr-digital/examples/demod/test_corr_est.grc
@@ -0,0 +1,3500 @@
+<?xml version='1.0' encoding='ASCII'?>
+<?grc format='1' created='3.7.7'?>
+<flow_graph>
+ <timestamp>Fri Jul 11 16:54:10 2014</timestamp>
+ <block>
+ <key>options</key>
+ <param>
+ <key>id</key>
+ <value>test_corr_est</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>title</key>
+ <value></value>
+ </param>
+ <param>
+ <key>author</key>
+ <value></value>
+ </param>
+ <param>
+ <key>description</key>
+ <value></value>
+ </param>
+ <param>
+ <key>window_size</key>
+ <value>2000,2000</value>
+ </param>
+ <param>
+ <key>generate_options</key>
+ <value>qt_gui</value>
+ </param>
+ <param>
+ <key>category</key>
+ <value>Custom</value>
+ </param>
+ <param>
+ <key>run_options</key>
+ <value>prompt</value>
+ </param>
+ <param>
+ <key>run</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>max_nouts</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>realtime_scheduling</key>
+ <value></value>
+ </param>
+ <param>
+ <key>thread_safe_setters</key>
+ <value></value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(10, 10)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>data</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>[0]*4+[random.getrandbits(8) for i in range(payload_size)]</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(16, 251)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>rrc_taps</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>firdes.root_raised_cosine(nfilts, nfilts, 1.0/float(sps), eb, 5*sps*nfilts)</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1075, 73)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>nfilts</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>32</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1074, 9)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>payload_size</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>992</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(101, 73)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>bb_filter</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>firdes.root_raised_cosine(sps, sps, 1, eb, 101)</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(429, 8)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>sps</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>4</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(278, 72)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>matched_filter</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>firdes.root_raised_cosine(nfilts, nfilts, 1, eb, int(11*sps*nfilts))</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(429, 72)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>100000</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(11, 72)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>gap</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>20000</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(202, 72)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>eb</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>0.35</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(346, 72)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>preamble</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>[0xac, 0xdd, 0xa4, 0xe2, 0xf2, 0x8c, 0x20, 0xfc]</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(279, 8)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable</key>
+ <param>
+ <key>id</key>
+ <value>rxmod</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>digital.generic_mod(constel, False, sps, True, eb, False, False)</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(8, 427)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>channels_channel_model</key>
+ <param>
+ <key>id</key>
+ <value>channels_channel_model_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>noise_voltage</key>
+ <value>noise</value>
+ </param>
+ <param>
+ <key>freq_offset</key>
+ <value>freq_offset</value>
+ </param>
+ <param>
+ <key>epsilon</key>
+ <value>time_offset</value>
+ </param>
+ <param>
+ <key>taps</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>seed</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>block_tags</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>affinity</key>
+ <value></value>
+ </param>
+ <param>
+ <key>minoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>maxoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(772, 158)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>blocks_throttle</key>
+ <param>
+ <key>id</key>
+ <value>blocks_throttle_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>samples_per_second</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>ignoretag</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>affinity</key>
+ <value></value>
+ </param>
+ <param>
+ <key>minoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>maxoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(586, 190)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>blocks_null_source</key>
+ <param>
+ <key>id</key>
+ <value>blocks_null_source_0_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>num_outputs</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>bus_conns</key>
+ <value>[[0,],]</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>affinity</key>
+ <value></value>
+ </param>
+ <param>
+ <key>minoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>maxoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(402, 322)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_qtgui_range</key>
+ <param>
+ <key>id</key>
+ <value>phase</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>Phase offset</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>start</key>
+ <value>-2*scipy.pi</value>
+ </param>
+ <param>
+ <key>stop</key>
+ <value>2*scipy.pi</value>
+ </param>
+ <param>
+ <key>step</key>
+ <value>0.1</value>
+ </param>
+ <param>
+ <key>widget</key>
+ <value>slider</value>
+ </param>
+ <param>
+ <key>orient</key>
+ <value>Qt.Horizontal</value>
+ </param>
+ <param>
+ <key>min_len</key>
+ <value>200</value>
+ </param>
+ <param>
+ <key>gui_hint</key>
+ <value>3,1,1,1</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(692, 7)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_qtgui_range</key>
+ <param>
+ <key>id</key>
+ <value>time_offset</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>Timing Offset</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>start</key>
+ <value>0.995</value>
+ </param>
+ <param>
+ <key>stop</key>
+ <value>1.005</value>
+ </param>
+ <param>
+ <key>step</key>
+ <value>0.00001</value>
+ </param>
+ <param>
+ <key>widget</key>
+ <value>slider</value>
+ </param>
+ <param>
+ <key>orient</key>
+ <value>Qt.Horizontal</value>
+ </param>
+ <param>
+ <key>min_len</key>
+ <value>200</value>
+ </param>
+ <param>
+ <key>gui_hint</key>
+ <value>4,1,1,1</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(950, 8)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_qtgui_range</key>
+ <param>
+ <key>id</key>
+ <value>noise</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>Noise</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>start</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>stop</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>step</key>
+ <value>0.005</value>
+ </param>
+ <param>
+ <key>widget</key>
+ <value>slider</value>
+ </param>
+ <param>
+ <key>orient</key>
+ <value>Qt.Horizontal</value>
+ </param>
+ <param>
+ <key>min_len</key>
+ <value>200</value>
+ </param>
+ <param>
+ <key>gui_hint</key>
+ <value>3,0,1,1</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(584, 7)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>digital_pfb_clock_sync_xxx</key>
+ <param>
+ <key>id</key>
+ <value>digital_pfb_clock_sync_xxx_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>ccf</value>
+ </param>
+ <param>
+ <key>sps</key>
+ <value>sps</value>
+ </param>
+ <param>
+ <key>loop_bw</key>
+ <value>2*3.14/100.0</value>
+ </param>
+ <param>
+ <key>taps</key>
+ <value>rrc_taps</value>
+ </param>
+ <param>
+ <key>filter_size</key>
+ <value>nfilts</value>
+ </param>
+ <param>
+ <key>init_phase</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>max_dev</key>
+ <value>0.5</value>
+ </param>
+ <param>
+ <key>osps</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>affinity</key>
+ <value></value>
+ </param>
+ <param>
+ <key>minoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>maxoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(790, 289)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>blocks_sub_xx</key>
+ <param>
+ <key>id</key>
+ <value>blocks_sub_xx_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>2</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>affinity</key>
+ <value></value>
+ </param>
+ <param>
+ <key>minoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>maxoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1125, 617)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_qtgui_range</key>
+ <param>
+ <key>id</key>
+ <value>delay</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>delay</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>90</value>
+ </param>
+ <param>
+ <key>start</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>stop</key>
+ <value>200</value>
+ </param>
+ <param>
+ <key>step</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>widget</key>
+ <value>counter_slider</value>
+ </param>
+ <param>
+ <key>orient</key>
+ <value>Qt.Horizontal</value>
+ </param>
+ <param>
+ <key>min_len</key>
+ <value>200</value>
+ </param>
+ <param>
+ <key>gui_hint</key>
+ <value>5,0,1,2</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(875, 571)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>blocks_char_to_float</key>
+ <param>
+ <key>id</key>
+ <value>blocks_char_to_float_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>scale</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>affinity</key>
+ <value></value>
+ </param>
+ <param>
+ <key>minoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>maxoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(752, 517)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>blocks_unpack_k_bits_bb</key>
+ <param>
+ <key>id</key>
+ <value>blocks_unpack_k_bits_bb_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>k</key>
+ <value>8</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>affinity</key>
+ <value></value>
+ </param>
+ <param>
+ <key>minoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>maxoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(576, 517)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>blocks_stream_mux</key>
+ <param>
+ <key>id</key>
+ <value>blocks_stream_mux_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>byte</value>
+ </param>
+ <param>
+ <key>lengths</key>
+ <value>(len(preamble)/8+payload_size), gap/sps/8</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>2</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>affinity</key>
+ <value></value>
+ </param>
+ <param>
+ <key>minoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>maxoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(390, 504)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>blocks_null_source</key>
+ <param>
+ <key>id</key>
+ <value>blocks_null_source_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>byte</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>num_outputs</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>bus_conns</key>
+ <value>[[0,],]</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>affinity</key>
+ <value></value>
+ </param>
+ <param>
+ <key>minoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>maxoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(210, 538)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>blocks_delay</key>
+ <param>
+ <key>id</key>
+ <value>blocks_delay_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>delay</key>
+ <value>int(delay)</value>
+ </param>
+ <param>
+ <key>num_ports</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>affinity</key>
+ <value></value>
+ </param>
+ <param>
+ <key>minoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>maxoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(923, 518)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>blocks_char_to_float</key>
+ <param>
+ <key>id</key>
+ <value>blocks_char_to_float_0_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>scale</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>affinity</key>
+ <value></value>
+ </param>
+ <param>
+ <key>minoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>maxoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1112, 482)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>qtgui_time_sink_x</key>
+ <param>
+ <key>id</key>
+ <value>qtgui_time_sink_x_0_1</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>name</key>
+ <value></value>
+ </param>
+ <param>
+ <key>ylabel</key>
+ <value>Amplitude</value>
+ </param>
+ <param>
+ <key>yunit</key>
+ <value>""</value>
+ </param>
+ <param>
+ <key>size</key>
+ <value>20000</value>
+ </param>
+ <param>
+ <key>srate</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>grid</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>autoscale</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>ymin</key>
+ <value>-2</value>
+ </param>
+ <param>
+ <key>ymax</key>
+ <value>2</value>
+ </param>
+ <param>
+ <key>nconnections</key>
+ <value>3</value>
+ </param>
+ <param>
+ <key>update_time</key>
+ <value>0.10</value>
+ </param>
+ <param>
+ <key>entags</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>gui_hint</key>
+ <value>2,0,1,2</value>
+ </param>
+ <param>
+ <key>tr_mode</key>
+ <value>qtgui.TRIG_MODE_TAG</value>
+ </param>
+ <param>
+ <key>tr_slope</key>
+ <value>qtgui.TRIG_SLOPE_POS</value>
+ </param>
+ <param>
+ <key>tr_level</key>
+ <value>0.0</value>
+ </param>
+ <param>
+ <key>tr_delay</key>
+ <value>0.010</value>
+ </param>
+ <param>
+ <key>tr_chan</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>tr_tag</key>
+ <value>time_est</value>
+ </param>
+ <param>
+ <key>ctrlpanel</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>legend</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label1</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width1</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color1</key>
+ <value>"blue"</value>
+ </param>
+ <param>
+ <key>style1</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>marker1</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>alpha1</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label2</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width2</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color2</key>
+ <value>"red"</value>
+ </param>
+ <param>
+ <key>style2</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>marker2</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>alpha2</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label3</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width3</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color3</key>
+ <value>"green"</value>
+ </param>
+ <param>
+ <key>style3</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>marker3</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>alpha3</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label4</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width4</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color4</key>
+ <value>"black"</value>
+ </param>
+ <param>
+ <key>style4</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>marker4</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>alpha4</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label5</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width5</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color5</key>
+ <value>"cyan"</value>
+ </param>
+ <param>
+ <key>style5</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>marker5</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>alpha5</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label6</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width6</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color6</key>
+ <value>"magenta"</value>
+ </param>
+ <param>
+ <key>style6</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>marker6</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>alpha6</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label7</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width7</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color7</key>
+ <value>"yellow"</value>
+ </param>
+ <param>
+ <key>style7</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>marker7</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>alpha7</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label8</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width8</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color8</key>
+ <value>"dark red"</value>
+ </param>
+ <param>
+ <key>style8</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>marker8</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>alpha8</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label9</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width9</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color9</key>
+ <value>"dark green"</value>
+ </param>
+ <param>
+ <key>style9</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>marker9</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>alpha9</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label10</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width10</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color10</key>
+ <value>"blue"</value>
+ </param>
+ <param>
+ <key>style10</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>marker10</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>alpha10</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>affinity</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1345, 531)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>digital_constellation_decoder_cb</key>
+ <param>
+ <key>id</key>
+ <value>digital_constellation_decoder_cb_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>constellation</key>
+ <value>constel</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>affinity</key>
+ <value></value>
+ </param>
+ <param>
+ <key>minoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>maxoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1111, 433)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>180</value>
+ </param>
+ </block>
+ <block>
+ <key>digital_costas_loop_cc</key>
+ <param>
+ <key>id</key>
+ <value>digital_costas_loop_cc_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>w</key>
+ <value>1*3.14/50.0</value>
+ </param>
+ <param>
+ <key>order</key>
+ <value>2</value>
+ </param>
+ <param>
+ <key>use_snr</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>affinity</key>
+ <value></value>
+ </param>
+ <param>
+ <key>minoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>maxoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1091, 303)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>qtgui_time_sink_x</key>
+ <param>
+ <key>id</key>
+ <value>qtgui_time_sink_x_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>name</key>
+ <value></value>
+ </param>
+ <param>
+ <key>ylabel</key>
+ <value>Amplitude</value>
+ </param>
+ <param>
+ <key>yunit</key>
+ <value>""</value>
+ </param>
+ <param>
+ <key>size</key>
+ <value>50000</value>
+ </param>
+ <param>
+ <key>srate</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>grid</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>autoscale</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>ymin</key>
+ <value>-2</value>
+ </param>
+ <param>
+ <key>ymax</key>
+ <value>2</value>
+ </param>
+ <param>
+ <key>nconnections</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>update_time</key>
+ <value>0.10</value>
+ </param>
+ <param>
+ <key>entags</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>gui_hint</key>
+ <value>0,0,1,1</value>
+ </param>
+ <param>
+ <key>tr_mode</key>
+ <value>qtgui.TRIG_MODE_TAG</value>
+ </param>
+ <param>
+ <key>tr_slope</key>
+ <value>qtgui.TRIG_SLOPE_POS</value>
+ </param>
+ <param>
+ <key>tr_level</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>tr_delay</key>
+ <value>0.1</value>
+ </param>
+ <param>
+ <key>tr_chan</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>tr_tag</key>
+ <value>time_est</value>
+ </param>
+ <param>
+ <key>ctrlpanel</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>legend</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label1</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width1</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color1</key>
+ <value>"blue"</value>
+ </param>
+ <param>
+ <key>style1</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>marker1</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>alpha1</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label2</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width2</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color2</key>
+ <value>"red"</value>
+ </param>
+ <param>
+ <key>style2</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>marker2</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>alpha2</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label3</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width3</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color3</key>
+ <value>"green"</value>
+ </param>
+ <param>
+ <key>style3</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>marker3</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>alpha3</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label4</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width4</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color4</key>
+ <value>"black"</value>
+ </param>
+ <param>
+ <key>style4</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>marker4</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>alpha4</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label5</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width5</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color5</key>
+ <value>"cyan"</value>
+ </param>
+ <param>
+ <key>style5</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>marker5</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>alpha5</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label6</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width6</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color6</key>
+ <value>"magenta"</value>
+ </param>
+ <param>
+ <key>style6</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>marker6</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>alpha6</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label7</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width7</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color7</key>
+ <value>"yellow"</value>
+ </param>
+ <param>
+ <key>style7</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>marker7</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>alpha7</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label8</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width8</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color8</key>
+ <value>"dark red"</value>
+ </param>
+ <param>
+ <key>style8</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>marker8</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>alpha8</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label9</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width9</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color9</key>
+ <value>"dark green"</value>
+ </param>
+ <param>
+ <key>style9</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>marker9</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>alpha9</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label10</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width10</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color10</key>
+ <value>"blue"</value>
+ </param>
+ <param>
+ <key>style10</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>marker10</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>alpha10</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>affinity</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1398, 370)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_constellation</key>
+ <param>
+ <key>id</key>
+ <value>constel</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>sym_map</key>
+ <value>[0,1]</value>
+ </param>
+ <param>
+ <key>const_points</key>
+ <value>[1,-1]</value>
+ </param>
+ <param>
+ <key>rot_sym</key>
+ <value>2</value>
+ </param>
+ <param>
+ <key>dims</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>precision</key>
+ <value>8</value>
+ </param>
+ <param>
+ <key>soft_dec_lut</key>
+ <value>None</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1237, 27)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_qtgui_range</key>
+ <param>
+ <key>id</key>
+ <value>freq_offset</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label</key>
+ <value>Frequency Offset</value>
+ </param>
+ <param>
+ <key>value</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>start</key>
+ <value>-0.001</value>
+ </param>
+ <param>
+ <key>stop</key>
+ <value>0.001</value>
+ </param>
+ <param>
+ <key>step</key>
+ <value>0.00002</value>
+ </param>
+ <param>
+ <key>widget</key>
+ <value>slider</value>
+ </param>
+ <param>
+ <key>orient</key>
+ <value>Qt.Horizontal</value>
+ </param>
+ <param>
+ <key>min_len</key>
+ <value>200</value>
+ </param>
+ <param>
+ <key>gui_hint</key>
+ <value>4,0,1,1</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(808, 7)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>qtgui_const_sink_x</key>
+ <param>
+ <key>id</key>
+ <value>qtgui_const_sink_x_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>name</key>
+ <value></value>
+ </param>
+ <param>
+ <key>size</key>
+ <value>(len(preamble)+payload_size)*8</value>
+ </param>
+ <param>
+ <key>grid</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>autoscale</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>ymin</key>
+ <value>-2</value>
+ </param>
+ <param>
+ <key>ymax</key>
+ <value>2</value>
+ </param>
+ <param>
+ <key>xmin</key>
+ <value>-2</value>
+ </param>
+ <param>
+ <key>xmax</key>
+ <value>2</value>
+ </param>
+ <param>
+ <key>nconnections</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>update_time</key>
+ <value>0.10</value>
+ </param>
+ <param>
+ <key>gui_hint</key>
+ <value>0,1,1,1</value>
+ </param>
+ <param>
+ <key>tr_mode</key>
+ <value>qtgui.TRIG_MODE_TAG</value>
+ </param>
+ <param>
+ <key>tr_slope</key>
+ <value>qtgui.TRIG_SLOPE_POS</value>
+ </param>
+ <param>
+ <key>tr_level</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>tr_chan</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>tr_tag</key>
+ <value>time_est</value>
+ </param>
+ <param>
+ <key>legend</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label1</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width1</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color1</key>
+ <value>"blue"</value>
+ </param>
+ <param>
+ <key>style1</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>marker1</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>alpha1</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label2</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width2</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color2</key>
+ <value>"red"</value>
+ </param>
+ <param>
+ <key>style2</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>marker2</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>alpha2</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label3</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width3</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color3</key>
+ <value>"red"</value>
+ </param>
+ <param>
+ <key>style3</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>marker3</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>alpha3</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label4</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width4</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color4</key>
+ <value>"red"</value>
+ </param>
+ <param>
+ <key>style4</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>marker4</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>alpha4</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label5</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width5</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color5</key>
+ <value>"red"</value>
+ </param>
+ <param>
+ <key>style5</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>marker5</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>alpha5</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label6</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width6</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color6</key>
+ <value>"red"</value>
+ </param>
+ <param>
+ <key>style6</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>marker6</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>alpha6</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label7</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width7</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color7</key>
+ <value>"red"</value>
+ </param>
+ <param>
+ <key>style7</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>marker7</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>alpha7</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label8</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width8</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color8</key>
+ <value>"red"</value>
+ </param>
+ <param>
+ <key>style8</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>marker8</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>alpha8</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label9</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width9</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color9</key>
+ <value>"red"</value>
+ </param>
+ <param>
+ <key>style9</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>marker9</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>alpha9</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label10</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width10</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color10</key>
+ <value>"red"</value>
+ </param>
+ <param>
+ <key>style10</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>marker10</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>alpha10</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>affinity</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1399, 283)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>blocks_complex_to_mag</key>
+ <param>
+ <key>id</key>
+ <value>blocks_complex_to_mag_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>affinity</key>
+ <value></value>
+ </param>
+ <param>
+ <key>minoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>maxoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1235, 149)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>blocks_complex_to_float</key>
+ <param>
+ <key>id</key>
+ <value>blocks_complex_to_float_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>affinity</key>
+ <value></value>
+ </param>
+ <param>
+ <key>minoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>maxoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1235, 194)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>import</key>
+ <param>
+ <key>id</key>
+ <value>import_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>import</key>
+ <value>import scipy</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(181, 16)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>import</key>
+ <param>
+ <key>id</key>
+ <value>import_0_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>import</key>
+ <value>import random</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(176, 147)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>blocks_vector_source_x</key>
+ <param>
+ <key>id</key>
+ <value>blocks_vector_source_x_0_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>byte</value>
+ </param>
+ <param>
+ <key>vector</key>
+ <value>preamble+data</value>
+ </param>
+ <param>
+ <key>tags</key>
+ <value>[]</value>
+ </param>
+ <param>
+ <key>repeat</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>affinity</key>
+ <value></value>
+ </param>
+ <param>
+ <key>minoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>maxoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(15, 165)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>digital_constellation_modulator</key>
+ <param>
+ <key>id</key>
+ <value>digital_constellation_modulator_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>constellation</key>
+ <value>constel</value>
+ </param>
+ <param>
+ <key>differential</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>samples_per_symbol</key>
+ <value>sps</value>
+ </param>
+ <param>
+ <key>excess_bw</key>
+ <value>eb</value>
+ </param>
+ <param>
+ <key>verbose</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>log</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>affinity</key>
+ <value></value>
+ </param>
+ <param>
+ <key>minoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>maxoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(312, 166)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>blocks_stream_mux</key>
+ <param>
+ <key>id</key>
+ <value>blocks_stream_mux_0_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>complex</value>
+ </param>
+ <param>
+ <key>lengths</key>
+ <value>(len(preamble)+len(data))*8*sps, gap</value>
+ </param>
+ <param>
+ <key>num_inputs</key>
+ <value>2</value>
+ </param>
+ <param>
+ <key>vlen</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>affinity</key>
+ <value></value>
+ </param>
+ <param>
+ <key>minoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>maxoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(568, 288)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>qtgui_time_sink_x</key>
+ <param>
+ <key>id</key>
+ <value>qtgui_time_sink_x_1</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>type</key>
+ <value>float</value>
+ </param>
+ <param>
+ <key>name</key>
+ <value></value>
+ </param>
+ <param>
+ <key>ylabel</key>
+ <value>Amplitude</value>
+ </param>
+ <param>
+ <key>yunit</key>
+ <value>""</value>
+ </param>
+ <param>
+ <key>size</key>
+ <value>80000</value>
+ </param>
+ <param>
+ <key>srate</key>
+ <value>samp_rate</value>
+ </param>
+ <param>
+ <key>grid</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>autoscale</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>ymin</key>
+ <value>-200</value>
+ </param>
+ <param>
+ <key>ymax</key>
+ <value>400</value>
+ </param>
+ <param>
+ <key>nconnections</key>
+ <value>3</value>
+ </param>
+ <param>
+ <key>update_time</key>
+ <value>0.10</value>
+ </param>
+ <param>
+ <key>entags</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>gui_hint</key>
+ <value>1,0,1,2</value>
+ </param>
+ <param>
+ <key>tr_mode</key>
+ <value>qtgui.TRIG_MODE_NORM</value>
+ </param>
+ <param>
+ <key>tr_slope</key>
+ <value>qtgui.TRIG_SLOPE_POS</value>
+ </param>
+ <param>
+ <key>tr_level</key>
+ <value>100</value>
+ </param>
+ <param>
+ <key>tr_delay</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>tr_chan</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>tr_tag</key>
+ <value>""</value>
+ </param>
+ <param>
+ <key>ctrlpanel</key>
+ <value>False</value>
+ </param>
+ <param>
+ <key>legend</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>label1</key>
+ <value>|corr|^2</value>
+ </param>
+ <param>
+ <key>width1</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color1</key>
+ <value>"blue"</value>
+ </param>
+ <param>
+ <key>style1</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>marker1</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>alpha1</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label2</key>
+ <value>Re{corr}</value>
+ </param>
+ <param>
+ <key>width2</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color2</key>
+ <value>"red"</value>
+ </param>
+ <param>
+ <key>style2</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>marker2</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>alpha2</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label3</key>
+ <value>Im{corr}</value>
+ </param>
+ <param>
+ <key>width3</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color3</key>
+ <value>"green"</value>
+ </param>
+ <param>
+ <key>style3</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>marker3</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>alpha3</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label4</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width4</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color4</key>
+ <value>"black"</value>
+ </param>
+ <param>
+ <key>style4</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>marker4</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>alpha4</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label5</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width5</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color5</key>
+ <value>"cyan"</value>
+ </param>
+ <param>
+ <key>style5</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>marker5</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>alpha5</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label6</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width6</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color6</key>
+ <value>"magenta"</value>
+ </param>
+ <param>
+ <key>style6</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>marker6</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>alpha6</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label7</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width7</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color7</key>
+ <value>"yellow"</value>
+ </param>
+ <param>
+ <key>style7</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>marker7</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>alpha7</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label8</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width8</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color8</key>
+ <value>"dark red"</value>
+ </param>
+ <param>
+ <key>style8</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>marker8</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>alpha8</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label9</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width9</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color9</key>
+ <value>"dark green"</value>
+ </param>
+ <param>
+ <key>style9</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>marker9</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>alpha9</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>label10</key>
+ <value></value>
+ </param>
+ <param>
+ <key>width10</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>color10</key>
+ <value>"blue"</value>
+ </param>
+ <param>
+ <key>style10</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>marker10</key>
+ <value>-1</value>
+ </param>
+ <param>
+ <key>alpha10</key>
+ <value>1.0</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>affinity</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(1433, 160)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>variable_modulate_vector</key>
+ <param>
+ <key>id</key>
+ <value>modulated_sync_word</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>mod</key>
+ <value>rxmod</value>
+ </param>
+ <param>
+ <key>data</key>
+ <value>preamble</value>
+ </param>
+ <param>
+ <key>taps</key>
+ <value>[1]</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(8, 491)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <block>
+ <key>digital_corr_est_cc</key>
+ <param>
+ <key>id</key>
+ <value>digital_corr_est_cc_0</value>
+ </param>
+ <param>
+ <key>_enabled</key>
+ <value>True</value>
+ </param>
+ <param>
+ <key>symbols</key>
+ <value>modulated_sync_word</value>
+ </param>
+ <param>
+ <key>sps</key>
+ <value>sps</value>
+ </param>
+ <param>
+ <key>mark_delay</key>
+ <value>1</value>
+ </param>
+ <param>
+ <key>threshold</key>
+ <value>0.9</value>
+ </param>
+ <param>
+ <key>alias</key>
+ <value></value>
+ </param>
+ <param>
+ <key>affinity</key>
+ <value></value>
+ </param>
+ <param>
+ <key>minoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>maxoutbuf</key>
+ <value>0</value>
+ </param>
+ <param>
+ <key>comment</key>
+ <value></value>
+ </param>
+ <param>
+ <key>_coordinate</key>
+ <value>(972, 174)</value>
+ </param>
+ <param>
+ <key>_rotation</key>
+ <value>0</value>
+ </param>
+ </block>
+ <connection>
+ <source_block_id>digital_costas_loop_cc_0</source_block_id>
+ <sink_block_id>qtgui_time_sink_x_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>digital_costas_loop_cc_0</source_block_id>
+ <sink_block_id>digital_constellation_decoder_cb_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>blocks_complex_to_float_0</source_block_id>
+ <sink_block_id>qtgui_time_sink_x_1</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>1</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>blocks_complex_to_mag_0</source_block_id>
+ <sink_block_id>qtgui_time_sink_x_1</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>digital_corr_est_cc_0</source_block_id>
+ <sink_block_id>digital_pfb_clock_sync_xxx_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>blocks_null_source_0_0</source_block_id>
+ <sink_block_id>blocks_stream_mux_0_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>1</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>blocks_stream_mux_0_0</source_block_id>
+ <sink_block_id>blocks_throttle_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>blocks_complex_to_float_0</source_block_id>
+ <sink_block_id>qtgui_time_sink_x_1</sink_block_id>
+ <source_key>1</source_key>
+ <sink_key>2</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>channels_channel_model_0</source_block_id>
+ <sink_block_id>digital_corr_est_cc_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>digital_constellation_modulator_0</source_block_id>
+ <sink_block_id>blocks_stream_mux_0_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>digital_corr_est_cc_0</source_block_id>
+ <sink_block_id>blocks_complex_to_mag_0</sink_block_id>
+ <source_key>1</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>digital_corr_est_cc_0</source_block_id>
+ <sink_block_id>blocks_complex_to_float_0</sink_block_id>
+ <source_key>1</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>blocks_throttle_0</source_block_id>
+ <sink_block_id>channels_channel_model_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>digital_pfb_clock_sync_xxx_0</source_block_id>
+ <sink_block_id>digital_costas_loop_cc_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>blocks_delay_0</source_block_id>
+ <sink_block_id>qtgui_time_sink_x_0_1</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>1</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>blocks_char_to_float_0_0</source_block_id>
+ <sink_block_id>blocks_sub_xx_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>blocks_delay_0</source_block_id>
+ <sink_block_id>blocks_sub_xx_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>1</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>blocks_sub_xx_0</source_block_id>
+ <sink_block_id>qtgui_time_sink_x_0_1</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>2</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>blocks_char_to_float_0_0</source_block_id>
+ <sink_block_id>qtgui_time_sink_x_0_1</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>blocks_stream_mux_0</source_block_id>
+ <sink_block_id>blocks_unpack_k_bits_bb_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>blocks_unpack_k_bits_bb_0</source_block_id>
+ <sink_block_id>blocks_char_to_float_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>blocks_null_source_0</source_block_id>
+ <sink_block_id>blocks_stream_mux_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>1</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>blocks_char_to_float_0</source_block_id>
+ <sink_block_id>blocks_delay_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>digital_constellation_decoder_cb_0</source_block_id>
+ <sink_block_id>blocks_char_to_float_0_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>digital_costas_loop_cc_0</source_block_id>
+ <sink_block_id>qtgui_const_sink_x_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+ <connection>
+ <source_block_id>blocks_vector_source_x_0_0</source_block_id>
+ <sink_block_id>digital_constellation_modulator_0</sink_block_id>
+ <source_key>0</source_key>
+ <sink_key>0</sink_key>
+ </connection>
+</flow_graph>
diff --git a/gr-digital/grc/digital_block_tree.xml b/gr-digital/grc/digital_block_tree.xml
index f6dcceb6d0..6707a8e4db 100644
--- a/gr-digital/grc/digital_block_tree.xml
+++ b/gr-digital/grc/digital_block_tree.xml
@@ -1,6 +1,6 @@
<?xml version="1.0"?>
<!--
- Copyright 2011-2013 Free Software Foundation, Inc.
+ Copyright 2011-2015 Free Software Foundation, Inc.
This file is part of GNU Radio
@@ -63,6 +63,7 @@
<block>digital_constellation_receiver_cb</block>
<block>variable_constellation</block>
<block>variable_constellation_rect</block>
+ <block>variable_modulate_vector</block>
</cat>
<cat>
<name>Packet Operators</name>
@@ -120,6 +121,7 @@
<block>digital_mpsk_receiver_cc</block>
<block>digital_pfb_clock_sync_xxx</block>
<block>digital_pn_correlator_cc</block>
+ <block>digital_corr_est_cc</block>
<block>digital_correlate_and_sync_cc</block>
</cat>
<cat>
diff --git a/gr-digital/grc/digital_corr_est_cc.xml b/gr-digital/grc/digital_corr_est_cc.xml
new file mode 100644
index 0000000000..d687cef67d
--- /dev/null
+++ b/gr-digital/grc/digital_corr_est_cc.xml
@@ -0,0 +1,41 @@
+<?xml version="1.0"?>
+<block>
+ <name>Correlation Estimator</name>
+ <key>digital_corr_est_cc</key>
+ <import>from gnuradio import digital</import>
+ <make>digital.corr_est_cc($symbols, $sps, $mark_delay, $threshold)</make>
+ <param>
+ <name>Symbols</name>
+ <key>symbols</key>
+ <type>complex_vector</type>
+ </param>
+ <param>
+ <name>Samples per Symbol</name>
+ <key>sps</key>
+ <type>float</type>
+ </param>
+ <param>
+ <name>Tag marking delay</name>
+ <key>mark_delay</key>
+ <type>int</type>
+ </param>
+ <param>
+ <name>Threshold</name>
+ <key>threshold</key>
+ <value>0.9</value>
+ <type>float</type>
+ </param>
+ <sink>
+ <name>in</name>
+ <type>complex</type>
+ </sink>
+ <source>
+ <name>out</name>
+ <type>complex</type>
+ </source>
+ <source>
+ <name>corr</name>
+ <type>complex</type>
+ <optional>1</optional>
+ </source>
+</block>
diff --git a/gr-digital/grc/digital_modulate_vector.xml b/gr-digital/grc/digital_modulate_vector.xml
new file mode 100644
index 0000000000..91614dd3fd
--- /dev/null
+++ b/gr-digital/grc/digital_modulate_vector.xml
@@ -0,0 +1,34 @@
+<?xml version="1.0"?>
+<!--
+###################################################
+# modulate_vector_bc
+###################################################
+ -->
+<block>
+ <name>Modulate Vector</name>
+ <key>variable_modulate_vector</key>
+ <category>Modulators</category>
+ <import>from gnuradio import digital</import>
+ <var_make>self.$(id) = $(id) = digital.modulate_vector_bc($mod .to_basic_block(), $data, $taps)</var_make>
+ <var_value>digital.modulate_vector_bc($mod .to_basic_block(), $data, $taps)</var_value>
+ <make></make>
+
+ <param>
+ <name>Modulator</name>
+ <key>mod</key>
+ <value></value>
+ <type>raw</type>
+ </param>
+ <param>
+ <name>Data vector</name>
+ <key>data</key>
+ <value></value>
+ <type>int_vector</type>
+ </param>
+ <param>
+ <name>Filter taps</name>
+ <key>taps</key>
+ <value></value>
+ <type>float_vector</type>
+ </param>
+</block>
diff --git a/gr-digital/include/gnuradio/digital/CMakeLists.txt b/gr-digital/include/gnuradio/digital/CMakeLists.txt
index c39b12bed2..2993497e93 100644
--- a/gr-digital/include/gnuradio/digital/CMakeLists.txt
+++ b/gr-digital/include/gnuradio/digital/CMakeLists.txt
@@ -1,4 +1,4 @@
-# Copyright 2011-2014 Free Software Foundation, Inc.
+# Copyright 2011-2015 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
@@ -42,6 +42,7 @@ install(FILES
constellation_decoder_cb.h
constellation_receiver_cb.h
constellation_soft_decoder_cf.h
+ corr_est_cc.h
correlate_access_code_bb.h
correlate_access_code_tag_bb.h
correlate_access_code_bb_ts.h
@@ -69,6 +70,7 @@ install(FILES
lms_dd_equalizer_cc.h
map_bb.h
metric_type.h
+ modulate_vector.h
mpsk_receiver_cc.h
mpsk_snr_est.h
mpsk_snr_est_cc.h
diff --git a/gr-digital/include/gnuradio/digital/corr_est_cc.h b/gr-digital/include/gnuradio/digital/corr_est_cc.h
new file mode 100644
index 0000000000..0d432ba409
--- /dev/null
+++ b/gr-digital/include/gnuradio/digital/corr_est_cc.h
@@ -0,0 +1,112 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2015 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ *
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef INCLUDED_DIGITAL_CORR_EST_CC_CC_H
+#define INCLUDED_DIGITAL_CORR_EST_CC_CC_H
+
+#include <gnuradio/digital/api.h>
+#include <gnuradio/sync_block.h>
+
+namespace gr {
+ namespace digital {
+
+ /*!
+ * \brief Correlate stream with a pre-defined sequence and estimate peak
+ * \ingroup synchronizers_blk
+ *
+ * \details
+ * Input:
+ * \li Stream of complex samples.
+ *
+ * Output:
+ * \li Output stream that just passes the input complex samples
+ * \li tag 'phase_est': estimate of phase offset
+ * \li tag 'time_est': estimate of symbol timing offset
+ * \li tag 'corr_est': the correlation value of the estimates
+ * \li tag 'corr_start': the start sample of the correlation and the value
+ *
+ * \li Optional 2nd output stream providing the advanced correlator output
+ *
+ * This block is designed to search for a sync word by correlation
+ * and uses the results of the correlation to get a time and phase
+ * offset estimate. These estimates are passed downstream as
+ * stream tags for use by follow-on synchronization blocks.
+ *
+ * The sync word is provided as a set of symbols along with a
+ * baseband matched filter which we use to create the filtered and
+ * upsampled symbols that we will receive over-the-air.
+ *
+ * The phase_est tag can be used by downstream blocks to adjust
+ * their phase estimatopm/correction loops, and is currently
+ * implemented by the gr::digital::costas_loop_cc block.
+ *
+ * The time_est tag can be used to adjust the sampling timing
+ * estimate of any downstream synchronization blocks and is
+ * currently implemented by the gr::digital::pfb_clock_sync_ccf
+ * block.
+ *
+ * The caller must provide a "time_est" and "phase_est" tag
+ * marking delay from the start of the correlated signal segment,
+ * in order to mark the proper point in the sync word for
+ * downstream synchronization blocks. Generally this block cannot
+ * know where the actual sync word symbols are located relative to
+ * "corr_start", given that some modulations have pulses with
+ * intentional ISI. The user should manually examine the primary
+ * output and the "corr_start" tag postition to determine the
+ * required tag delay settings for the particular modulation,
+ * sync word, and downstream blocks used.
+ *
+ * For a discussion of the properties of complex correlations,
+ * with respect to signal processing, see:
+ * Marple, Jr., S. L., "Estimating Group Delay and Phase Delay
+ * via Discrete-Time 'Analytic' Cross-Correlation, _IEEE_Transcations_
+ * _on_Signal_Processing_, Volume 47, No. 9, September 1999
+ *
+ */
+ class DIGITAL_API corr_est_cc : virtual public sync_block
+ {
+ public:
+ typedef boost::shared_ptr<corr_est_cc> sptr;
+
+ /*!
+ * Make a block that correlates against the \p symbols vector
+ * and outputs a phase and symbol timing estimate.
+ *
+ * \param symbols Set of symbols to correlate against (e.g., a
+ * sync word).
+ * \param sps Samples per symbol
+ * \param mark_delay tag marking delay in samples after the
+ * corr_start tag
+ * \param threshold Threshold of correlator, relative to a 100%
+ * correlation (1.0). Default is 0.9.
+ */
+ static sptr make(const std::vector<gr_complex> &symbols,
+ float sps, unsigned int mark_delay, float threshold=0.9);
+
+ virtual std::vector<gr_complex> symbols() const = 0;
+ virtual void set_symbols(const std::vector<gr_complex> &symbols) = 0;
+ };
+
+ } // namespace digital
+} // namespace gr
+
+#endif /* INCLUDED_DIGITAL_CORR_EST_CC_H */
diff --git a/gr-digital/include/gnuradio/digital/modulate_vector.h b/gr-digital/include/gnuradio/digital/modulate_vector.h
new file mode 100644
index 0000000000..6083099a89
--- /dev/null
+++ b/gr-digital/include/gnuradio/digital/modulate_vector.h
@@ -0,0 +1,70 @@
+/*
+ * Copyright 2015 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ *
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef INCLUDED_DIGITAL_MODULATE_VECTOR_H
+#define INCLUDED_DIGITAL_MODULATE_VECTOR_H
+
+#include <gnuradio/digital/api.h>
+#include <gnuradio/types.h>
+
+namespace gr {
+ namespace digital {
+
+ /*!
+ * \brief Modulate a vector of data and apply a shaping filter.
+ *
+ * \p modulator: Pointer to a byte-to-complex modulator block.
+ * \p data: Vector of bytes to modulate into symbols.
+ * \p taps: Post-modulation symbol shaping filter taps.
+ *
+ * \details
+ * This function modulates the input vector and applies a
+ * symbol shaping filter. It is intended for use with the
+ * corr_est_cc block as the symbol stream to correlate
+ * against.
+ *
+ * Any differential encoding or other data coding must be
+ * performed on the input vector before this modulation
+ * operation.
+ *
+ * Be aware that the format of the incoming data must match
+ * the format the modulator block is expecting. GNURadio
+ * modulator blocks are inconsistent in their data type
+ * expectations. For instance, cpmmod_bc expects unpacked,
+ * signed bytes in (-1, 1), while gmsk_mod expects packed,
+ * unsigned bytes in (0, 1). In other words, the output of
+ * gmsk_mod given the input vector [0xaa, 0x00] is equivalent
+ * to the output of cpmmod_bc given the input vector
+ * [1,255,1,255,1,255,1,255,255,255,255,255,255,255,255,255]
+ *
+ * Please check the documentation or source of the modulator
+ * before using this function.
+ *
+ */
+ DIGITAL_API std::vector<gr_complex>
+ modulate_vector_bc(basic_block_sptr modulator,
+ std::vector<uint8_t> data,
+ std::vector<float> taps);
+
+ } /* namespace digital */
+} /* namespace gr */
+
+#endif /* INCLUDED_DIGITAL_MODULATE_VECTOR_H */
diff --git a/gr-digital/lib/CMakeLists.txt b/gr-digital/lib/CMakeLists.txt
index eb1008423b..0c213d7ac8 100644
--- a/gr-digital/lib/CMakeLists.txt
+++ b/gr-digital/lib/CMakeLists.txt
@@ -60,6 +60,7 @@ list(APPEND digital_sources
constellation_decoder_cb_impl.cc
constellation_receiver_cb_impl.cc
constellation_soft_decoder_cf_impl.cc
+ corr_est_cc_impl.cc
correlate_access_code_bb_impl.cc
correlate_access_code_tag_bb_impl.cc
correlate_access_code_bb_ts_impl.cc
@@ -85,6 +86,7 @@ list(APPEND digital_sources
kurtotic_equalizer_cc_impl.cc
lms_dd_equalizer_cc_impl.cc
map_bb_impl.cc
+ modulate_vector.cc
mpsk_receiver_cc_impl.cc
mpsk_snr_est.cc
mpsk_snr_est_cc_impl.cc
diff --git a/gr-digital/lib/corr_est_cc_impl.cc b/gr-digital/lib/corr_est_cc_impl.cc
new file mode 100644
index 0000000000..0d2470b678
--- /dev/null
+++ b/gr-digital/lib/corr_est_cc_impl.cc
@@ -0,0 +1,282 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2015 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ *
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gnuradio/io_signature.h>
+#include <gnuradio/math.h>
+#include "corr_est_cc_impl.h"
+#include <volk/volk.h>
+#include <boost/format.hpp>
+#include <boost/math/special_functions/round.hpp>
+#include <gnuradio/filter/pfb_arb_resampler.h>
+#include <gnuradio/filter/firdes.h>
+
+namespace gr {
+ namespace digital {
+
+ corr_est_cc::sptr
+ corr_est_cc::make(const std::vector<gr_complex> &symbols,
+ float sps, unsigned int mark_delay,
+ float threshold)
+ {
+ return gnuradio::get_initial_sptr
+ (new corr_est_cc_impl(symbols, sps, mark_delay, threshold));
+ }
+
+ corr_est_cc_impl::corr_est_cc_impl(const std::vector<gr_complex> &symbols,
+ float sps, unsigned int mark_delay,
+ float threshold)
+ : sync_block("corr_est_cc",
+ io_signature::make(1, 1, sizeof(gr_complex)),
+ io_signature::make(1, 2, sizeof(gr_complex))),
+ d_src_id(pmt::intern(alias()))
+ {
+ d_sps = sps;
+
+ // Create time-reversed conjugate of symbols
+ d_symbols = symbols;
+ for(size_t i=0; i < d_symbols.size(); i++) {
+ d_symbols[i] = conj(d_symbols[i]);
+ }
+ std::reverse(d_symbols.begin(), d_symbols.end());
+
+ d_mark_delay = mark_delay >= d_symbols.size() ? d_symbols.size() - 1
+ : mark_delay;
+
+ // Compute a correlation threshold.
+ // Compute the value of the discrete autocorrelation of the matched
+ // filter with offset 0 (aka the autocorrelation peak).
+ float corr = 0;
+ for(size_t i = 0; i < d_symbols.size(); i++)
+ corr += abs(d_symbols[i]*conj(d_symbols[i]));
+ d_thresh = threshold*corr*corr;
+
+ // Correlation filter
+ d_filter = new kernel::fft_filter_ccc(1, d_symbols);
+
+ // Per comments in gr-filter/include/gnuradio/filter/fft_filter.h,
+ // set the block output multiple to the FFT filter kernel's internal,
+ // assumed "nsamples", to ensure the scheduler always passes a
+ // proper number of samples.
+ int nsamples;
+ nsamples = d_filter->set_taps(d_symbols);
+ set_output_multiple(nsamples);
+
+ // It looks like the kernel::fft_filter_ccc stashes a tail between
+ // calls, so that contains our filtering history (I think). The
+ // fft_filter_ccc block (which calls the kernel::fft_filter_ccc) sets
+ // the history to 1 (0 history items), so let's follow its lead.
+ //set_history(1);
+
+ // We'll (ab)use the history for our own purposes of tagging back in time.
+ // Keep a history of the length of the sync word to delay for tagging.
+ set_history(d_symbols.size()+1);
+
+ declare_sample_delay(1, 0);
+ declare_sample_delay(0, d_symbols.size());
+
+ // Setting the alignment multiple for volk causes problems with the
+ // expected behavior of setting the output multiple for the FFT filter.
+ // Don't set the alignment multiple.
+ //const int alignment_multiple =
+ // volk_get_alignment() / sizeof(gr_complex);
+ //set_alignment(std::max(1,alignment_multiple));
+
+ // In order to easily support the optional second output,
+ // don't deal with an unbounded max number of output items.
+ // For the common case of not using the optional second output,
+ // this ensures we optimally call the volk routines.
+ const size_t nitems = 24*1024;
+ set_max_noutput_items(nitems);
+ d_corr = (gr_complex *)
+ volk_malloc(sizeof(gr_complex)*nitems, volk_get_alignment());
+ d_corr_mag = (float *)
+ volk_malloc(sizeof(float)*nitems, volk_get_alignment());
+ }
+
+ corr_est_cc_impl::~corr_est_cc_impl()
+ {
+ delete d_filter;
+ volk_free(d_corr);
+ volk_free(d_corr_mag);
+ }
+
+ std::vector<gr_complex>
+ corr_est_cc_impl::symbols() const
+ {
+ return d_symbols;
+ }
+
+ void
+ corr_est_cc_impl::set_symbols(const std::vector<gr_complex> &symbols)
+ {
+ gr::thread::scoped_lock lock(d_setlock);
+
+ d_symbols = symbols;
+
+ // Per comments in gr-filter/include/gnuradio/filter/fft_filter.h,
+ // set the block output multiple to the FFT filter kernel's internal,
+ // assumed "nsamples", to ensure the scheduler always passes a
+ // proper number of samples.
+ int nsamples;
+ nsamples = d_filter->set_taps(d_symbols);
+ set_output_multiple(nsamples);
+
+ // It looks like the kernel::fft_filter_ccc stashes a tail between
+ // calls, so that contains our filtering history (I think). The
+ // fft_filter_ccc block (which calls the kernel::fft_filter_ccc) sets
+ // the history to 1 (0 history items), so let's follow its lead.
+ //set_history(1);
+
+ // We'll (ab)use the history for our own purposes of tagging back in time.
+ // Keep a history of the length of the sync word to delay for tagging.
+ set_history(d_symbols.size()+1);
+
+ declare_sample_delay(1, 0);
+ declare_sample_delay(0, d_symbols.size());
+
+ d_mark_delay = d_mark_delay >= d_symbols.size() ? d_symbols.size()-1
+ : d_mark_delay;
+ }
+
+ int
+ corr_est_cc_impl::work(int noutput_items,
+ gr_vector_const_void_star &input_items,
+ gr_vector_void_star &output_items)
+ {
+ gr::thread::scoped_lock lock(d_setlock);
+
+ const gr_complex *in = (gr_complex *)input_items[0];
+ gr_complex *out = (gr_complex*)output_items[0];
+ gr_complex *corr;
+ if (output_items.size() > 1)
+ corr = (gr_complex *) output_items[1];
+ else
+ corr = d_corr;
+
+ // Our correlation filter length
+ unsigned int hist_len = history() - 1;
+
+ // Delay the output by our correlation filter length so we can
+ // tag backwards in time
+ memcpy(out, &in[0], sizeof(gr_complex)*noutput_items);
+
+ // Calculate the correlation of the non-delayed input with the
+ // known symbols.
+ d_filter->filter(noutput_items, &in[hist_len], corr);
+
+ // Find the magnitude squared of the correlation
+ volk_32fc_magnitude_squared_32f(&d_corr_mag[0], corr, noutput_items);
+
+ int isps = (int)(d_sps + 0.5f);
+ int i = 0;
+ while(i < noutput_items) {
+ // Look for the correlator output to cross the threshold
+ if (d_corr_mag[i] <= d_thresh) {
+ i++;
+ continue;
+ }
+ // Go to (just past) the current correlator output peak
+ while ((i < (noutput_items-1)) &&
+ (d_corr_mag[i] < d_corr_mag[i+1]))
+ i++;
+
+ // Delaying the primary signal output by the matched filter
+ // length using history(), means that the the peak output of
+ // the matched filter aligns with the start of the desired
+ // sync word in the primary signal output. This corr_start
+ // tag is not offset to another sample, so that downstream
+ // data-aided blocks (like adaptive equalizers) know exactly
+ // where the start of the correlated symbols are.
+ add_item_tag(0, nitems_written(0) + i, pmt::intern("corr_start"),
+ pmt::from_double(d_corr_mag[i]), d_src_id);
+
+ // Peak detector using a "center of mass" approach center
+ // holds the +/- fraction of a sample index from the found
+ // peak index to the estimated actual peak index.
+ double center = 0.0;
+ if (i > 0 and i < (noutput_items - 1)) {
+ double nom = 0, den = 0;
+ for(int s = 0; s < 3; s++) {
+ nom += (s+1)*d_corr_mag[i+s-1];
+ den += d_corr_mag[i+s-1];
+ }
+ center = nom / den - 2.0;
+ }
+
+ // Calculate the phase offset of the incoming signal.
+ //
+ // The analytic cross-correlation is:
+ //
+ // 2A*e_bb(t-t_d)*exp(-j*2*pi*f*(t-t_d) - j*phi_bb(t-t_d) - j*theta_c)
+ //
+
+ // The analytic auto-correlation's envelope, e_bb(), has its
+ // peak at the "group delay" time, t = t_d. The analytic
+ // cross-correlation's center frequency phase shift, theta_c,
+ // is determined from the argument of the analytic
+ // cross-correlation at the "group delay" time, t = t_d.
+ //
+ // Taking the argument of the analytic cross-correlation at
+ // any other time will include the baseband auto-correlation's
+ // phase term, phi_bb(t-t_d), and a frequency dependent term
+ // of the cross-correlation, which I don't believe maps simply
+ // to expected symbol phase differences.
+ float phase = fast_atan2f(corr[i].imag(), corr[i].real());
+ int index = i + d_mark_delay;
+
+ add_item_tag(0, nitems_written(0) + index, pmt::intern("phase_est"),
+ pmt::from_double(phase), d_src_id);
+ add_item_tag(0, nitems_written(0) + index, pmt::intern("time_est"),
+ pmt::from_double(center), d_src_id);
+ // N.B. the appropriate d_corr_mag[] index is "i", not "index".
+ add_item_tag(0, nitems_written(0) + index, pmt::intern("corr_est"),
+ pmt::from_double(d_corr_mag[i]), d_src_id);
+
+ if (output_items.size() > 1) {
+ // N.B. these debug tags are not offset to avoid walking off out buf
+ add_item_tag(1, nitems_written(0) + i, pmt::intern("phase_est"),
+ pmt::from_double(phase), d_src_id);
+ add_item_tag(1, nitems_written(0) + i, pmt::intern("time_est"),
+ pmt::from_double(center), d_src_id);
+ add_item_tag(1, nitems_written(0) + i, pmt::intern("corr_est"),
+ pmt::from_double(d_corr_mag[i]), d_src_id);
+ }
+
+ // Skip ahead to the next potential symbol peak
+ // (for non-offset/interleaved symbols)
+ i += isps;
+ }
+
+ //if (output_items.size() > 1)
+ // add_item_tag(1, nitems_written(0) + noutput_items - 1,
+ // pmt::intern("ce_eow"), pmt::from_uint64(noutput_items),
+ // d_src_id);
+
+ return noutput_items;
+ }
+
+ } /* namespace digital */
+} /* namespace gr */
diff --git a/gr-digital/lib/corr_est_cc_impl.h b/gr-digital/lib/corr_est_cc_impl.h
new file mode 100644
index 0000000000..83b5db60e1
--- /dev/null
+++ b/gr-digital/lib/corr_est_cc_impl.h
@@ -0,0 +1,64 @@
+/* -*- c++ -*- */
+/*
+ * Copyright 2013 Free Software Foundation, Inc.
+ *
+ * This file is part of GNU Radio
+ *
+ * GNU Radio is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 3, or (at your option)
+ * any later version.
+ *
+ * GNU Radio is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with GNU Radio; see the file COPYING. If not, write to
+ * the Free Software Foundation, Inc., 51 Franklin Street,
+ * Boston, MA 02110-1301, USA.
+ */
+
+#ifndef INCLUDED_DIGITAL_CORR_EST_CC_IMPL_H
+#define INCLUDED_DIGITAL_CORR_EST_CC_IMPL_H
+
+#include <gnuradio/digital/corr_est_cc.h>
+#include <gnuradio/filter/fft_filter.h>
+
+using namespace gr::filter;
+
+namespace gr {
+ namespace digital {
+
+ class corr_est_cc_impl : public corr_est_cc
+ {
+ private:
+ pmt::pmt_t d_src_id;
+ std::vector<gr_complex> d_symbols;
+ float d_sps;
+ unsigned int d_mark_delay;
+ float d_thresh;
+ kernel::fft_filter_ccc *d_filter;
+
+ gr_complex *d_corr;
+ float *d_corr_mag;
+
+ public:
+ corr_est_cc_impl(const std::vector<gr_complex> &symbols,
+ float sps, unsigned int mark_delay,
+ float threshold=0.9);
+ ~corr_est_cc_impl();
+
+ std::vector<gr_complex> symbols() const;
+ void set_symbols(const std::vector<gr_complex> &symbols);
+
+ int work(int noutput_items,
+ gr_vector_const_void_star &input_items,
+ gr_vector_void_star &output_items);
+ };
+
+ } // namespace digital
+} // namespace gr
+
+#endif /* INCLUDED_DIGITAL_CORR_EST_CC_IMPL_H */
diff --git a/gr-digital/lib/modulate_vector.cc b/gr-digital/lib/modulate_vector.cc
new file mode 100644
index 0000000000..281e3435c5
--- /dev/null
+++ b/gr-digital/lib/modulate_vector.cc
@@ -0,0 +1,70 @@
+/*
+* Copyright 2015 Free Software Foundation, Inc.
+*
+* This file is part of GNU Radio
+*
+* GNU Radio is free software; you can redistribute it and/or modify
+* it under the terms of the GNU General Public License as published by
+* the Free Software Foundation; either version 3, or (at your option)
+* any later version.
+*
+* GNU Radio is distributed in the hope that it will be useful,
+* but WITHOUT ANY WARRANTY; without even the implied warranty of
+* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+* GNU General Public License for more details.
+*
+* You should have received a copy of the GNU General Public License
+* along with GNU Radio; see the file COPYING. If not, write to
+* the Free Software Foundation, Inc., 51 Franklin Street,
+* Boston, MA 02110-1301, USA.
+*
+*/
+
+/*
+* Generate a modulated transmit vector corresponding to a particular
+* data sequence, resampling rate, and shaping filter. The output is
+* suitable for use as a candidate filter for the correlate_and_sync
+* block, or just for prototyping.
+*
+* It accepts a sptr to a modulator block as an argument; given
+* suitable data vectors and arguments you should be able to use any of
+* the GNU Radio modulator blocks as a modulator. Be careful that some
+* modulators expect packed words, some expect unpacked words, and some
+* have unique expectations, requirements, or limitations.
+
+* modulator as: gr.block or gr.hier_block
+* taps as: list or array
+*/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#include <gnuradio/blocks/vector_source_b.h>
+#include <gnuradio/blocks/vector_sink_c.h>
+#include <gnuradio/filter/fir_filter_ccf.h>
+#include <gnuradio/top_block.h>
+#include <gnuradio/digital/modulate_vector.h>
+
+namespace gr {
+ namespace digital {
+ std::vector<gr_complex> modulate_vector_bc(basic_block_sptr modulator,
+ std::vector<uint8_t> data,
+ std::vector<float> taps)
+ {
+ blocks::vector_source_b::sptr vector_src = blocks::vector_source_b::make(data);
+ filter::fir_filter_ccf::sptr filter = filter::fir_filter_ccf::make(1, taps);
+ blocks::vector_sink_c::sptr vector_sink = blocks::vector_sink_c::make();
+
+ top_block_sptr tb = make_top_block("modulate_vector");
+
+ tb->connect(vector_src, 0, modulator, 0);
+ tb->connect(modulator, 0, filter, 0);
+ tb->connect(filter, 0, vector_sink, 0);
+
+ tb->run();
+
+ return vector_sink->data();
+ }
+ } /* namespace digital */
+} /* namespace gr */
diff --git a/gr-digital/swig/digital_swig.i b/gr-digital/swig/digital_swig.i
index 43f68a3d6e..675c9b02b5 100644
--- a/gr-digital/swig/digital_swig.i
+++ b/gr-digital/swig/digital_swig.i
@@ -1,5 +1,5 @@
/*
- * Copyright 2011,2012 Free Software Foundation, Inc.
+ * Copyright 2011-2015 Free Software Foundation, Inc.
*
* This file is part of GNU Radio
*
@@ -52,6 +52,7 @@
#include "gnuradio/digital/constellation_decoder_cb.h"
#include "gnuradio/digital/constellation_receiver_cb.h"
#include "gnuradio/digital/constellation_soft_decoder_cf.h"
+#include "gnuradio/digital/corr_est_cc.h"
#include "gnuradio/digital/correlate_access_code_bb.h"
#include "gnuradio/digital/correlate_access_code_tag_bb.h"
#include "gnuradio/digital/correlate_access_code_bb_ts.h"
@@ -78,6 +79,7 @@
#include "gnuradio/digital/lms_dd_equalizer_cc.h"
#include "gnuradio/digital/map_bb.h"
#include "gnuradio/digital/metric_type.h"
+#include "gnuradio/digital/modulate_vector.h"
#include "gnuradio/digital/mpsk_receiver_cc.h"
#include "gnuradio/digital/mpsk_snr_est.h"
#include "gnuradio/digital/mpsk_snr_est_cc.h"
@@ -128,6 +130,7 @@
%include "gnuradio/digital/constellation_decoder_cb.h"
%include "gnuradio/digital/constellation_receiver_cb.h"
%include "gnuradio/digital/constellation_soft_decoder_cf.h"
+%include "gnuradio/digital/corr_est_cc.h"
%include "gnuradio/digital/correlate_access_code_bb.h"
%include "gnuradio/digital/correlate_access_code_tag_bb.h"
%include "gnuradio/digital/correlate_access_code_bb_ts.h"
@@ -154,6 +157,7 @@
%include "gnuradio/digital/lms_dd_equalizer_cc.h"
%include "gnuradio/digital/map_bb.h"
%include "gnuradio/digital/metric_type.h"
+%include "gnuradio/digital/modulate_vector.h"
%include "gnuradio/digital/mpsk_receiver_cc.h"
%include "gnuradio/digital/mpsk_snr_est.h"
%include "gnuradio/digital/mpsk_snr_est_cc.h"
@@ -199,6 +203,7 @@ GR_SWIG_BLOCK_MAGIC2(digital, cma_equalizer_cc);
GR_SWIG_BLOCK_MAGIC2(digital, constellation_decoder_cb);
GR_SWIG_BLOCK_MAGIC2(digital, constellation_receiver_cb);
GR_SWIG_BLOCK_MAGIC2(digital, constellation_soft_decoder_cf);
+GR_SWIG_BLOCK_MAGIC2(digital, corr_est_cc);
GR_SWIG_BLOCK_MAGIC2(digital, correlate_access_code_bb);
GR_SWIG_BLOCK_MAGIC2(digital, correlate_access_code_tag_bb);
GR_SWIG_BLOCK_MAGIC2(digital, correlate_access_code_bb_ts);
generated by cgit v1.2.3 (git 2.39.1) at 2025-03-16 23:36:14 +0000