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authorBen Reynwar <ben@reynwar.net>2013-04-02 23:04:08 -0700
committerBen Reynwar <ben@reynwar.net>2013-04-02 23:04:08 -0700
commitc6dbde23b256a41b3d92cb4ad6b63287095d53c7 (patch)
tree71db12ea2e1667770c22568dcdf5e0857d5f1e59 /gr-digital/python/digital/qa_ofdm_carrier_allocator_cvc.py
parent22b70d0889ef3c51e27a31ee18d153093a55cbb8 (diff)
parent98758cbfa9a2aff714952d19e773bc370dfa2185 (diff)
Merged next into uninstalled import branch.
Diffstat (limited to 'gr-digital/python/digital/qa_ofdm_carrier_allocator_cvc.py')
-rwxr-xr-xgr-digital/python/digital/qa_ofdm_carrier_allocator_cvc.py186
1 files changed, 186 insertions, 0 deletions
diff --git a/gr-digital/python/digital/qa_ofdm_carrier_allocator_cvc.py b/gr-digital/python/digital/qa_ofdm_carrier_allocator_cvc.py
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index 0000000000..56cd7a617e
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+++ b/gr-digital/python/digital/qa_ofdm_carrier_allocator_cvc.py
@@ -0,0 +1,186 @@
+#!/usr/bin/env python
+# Copyright 2012,2013 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.
+#
+
+from gnuradio import gr, gr_unittest, digital, blocks
+import pmt
+
+class qa_digital_carrier_allocator_cvc (gr_unittest.TestCase):
+
+ def setUp (self):
+ self.tb = gr.top_block ()
+
+ def tearDown (self):
+ self.tb = None
+
+ def test_001_t (self):
+ """
+ pretty simple (the carrier allocation is not a practical OFDM configuration!)
+ """
+ fft_len = 6
+ tx_symbols = (1, 2, 3)
+ # ^ this gets mapped to the DC carrier because occupied_carriers[0][0] == 0
+ pilot_symbols = ((1j,),)
+ occupied_carriers = ((0, 1, 2),)
+ pilot_carriers = ((3,),)
+ sync_word = (range(fft_len),)
+ expected_result = tuple(sync_word[0] + [1j, 0, 0, 1, 2, 3])
+ # ^ DC carrier
+ tag_name = "len"
+ tag = gr.gr_tag_t()
+ tag.offset = 0
+ tag.key = pmt.string_to_symbol(tag_name)
+ tag.value = pmt.from_long(len(tx_symbols))
+ src = blocks.vector_source_c(tx_symbols, False, 1, (tag,))
+ alloc = digital.ofdm_carrier_allocator_cvc(fft_len,
+ occupied_carriers,
+ pilot_carriers,
+ pilot_symbols, sync_word,
+ tag_name)
+ sink = blocks.vector_sink_c(fft_len)
+ self.tb.connect(src, alloc, sink)
+ self.tb.run ()
+ self.assertEqual(sink.data(), expected_result)
+
+ def test_001_t2 (self):
+ """
+ pretty simple (same as before, but odd fft len)
+ """
+ fft_len = 5
+ tx_symbols = (1, 2, 3)
+ # ^ this gets mapped to the DC carrier because occupied_carriers[0][0] == 0
+ occupied_carriers = ((0, 1, 2),)
+ pilot_carriers = ((-2,),)
+ pilot_symbols = ((1j,),)
+ expected_result = (1j, 0, 1, 2, 3)
+ # ^ DC carrier
+ tag_name = "len"
+ tag = gr.gr_tag_t()
+ tag.offset = 0
+ tag.key = pmt.string_to_symbol(tag_name)
+ tag.value = pmt.from_long(len(tx_symbols))
+ src = blocks.vector_source_c(tx_symbols, False, 1, (tag,))
+ alloc = digital.ofdm_carrier_allocator_cvc(fft_len,
+ occupied_carriers,
+ pilot_carriers,
+ pilot_symbols, (),
+ tag_name)
+ sink = blocks.vector_sink_c(fft_len)
+ self.tb.connect(src, alloc, sink)
+ self.tb.run ()
+ self.assertEqual(sink.data(), expected_result)
+
+ def test_002_t (self):
+ """
+ same, but using negative carrier indices
+ """
+ fft_len = 6
+ tx_symbols = (1, 2, 3)
+ pilot_symbols = ((1j,),)
+ occupied_carriers = ((-1, 1, 2),)
+ pilot_carriers = ((3,),)
+ expected_result = (1j, 0, 1, 0, 2, 3)
+ tag_name = "len"
+ tag = gr.gr_tag_t()
+ tag.offset = 0
+ tag.key = pmt.string_to_symbol(tag_name)
+ tag.value = pmt.from_long(len(tx_symbols))
+ src = blocks.vector_source_c(tx_symbols, False, 1, (tag,))
+ alloc = digital.ofdm_carrier_allocator_cvc(fft_len,
+ occupied_carriers,
+ pilot_carriers,
+ pilot_symbols, (),
+ tag_name)
+ sink = blocks.vector_sink_c(fft_len)
+ self.tb.connect(src, alloc, sink)
+ self.tb.run ()
+ self.assertEqual(sink.data(), expected_result)
+
+ def test_003_t (self):
+ """
+ more advanced:
+ - 6 symbols per carrier
+ - 2 pilots per carrier
+ - have enough data for nearly 3 OFDM symbols
+ - send that twice
+ - add some random tags
+ - don't shift
+ """
+ tx_symbols = range(1, 16); # 15 symbols
+ pilot_symbols = ((1j, 2j), (3j, 4j))
+ occupied_carriers = ((1, 3, 4, 11, 12, 14), (1, 2, 4, 11, 13, 14),)
+ pilot_carriers = ((2, 13), (3, 12))
+ expected_result = (0, 1, 1j, 2, 3, 0, 0, 0, 0, 0, 0, 4, 5, 2j, 6, 0,
+ 0, 7, 8, 3j, 9, 0, 0, 0, 0, 0, 0, 10, 4j, 11, 12, 0,
+ 0, 13, 1j, 14, 15, 0, 0, 0, 0, 0, 0, 0, 0, 2j, 0, 0)
+ fft_len = 16
+ tag_name = "len"
+ tag1 = gr.gr_tag_t()
+ tag1.offset = 0
+ tag1.key = pmt.string_to_symbol(tag_name)
+ tag1.value = pmt.from_long(len(tx_symbols))
+ tag2 = gr.gr_tag_t()
+ tag2.offset = len(tx_symbols)
+ tag2.key = pmt.string_to_symbol(tag_name)
+ tag2.value = pmt.from_long(len(tx_symbols))
+ testtag1 = gr.gr_tag_t()
+ testtag1.offset = 0
+ testtag1.key = pmt.string_to_symbol('tag1')
+ testtag1.value = pmt.from_long(0)
+ testtag2 = gr.gr_tag_t()
+ testtag2.offset = 7 # On the 2nd OFDM symbol
+ testtag2.key = pmt.string_to_symbol('tag2')
+ testtag2.value = pmt.from_long(0)
+ testtag3 = gr.gr_tag_t()
+ testtag3.offset = len(tx_symbols)+1 # First OFDM symbol of packet 2
+ testtag3.key = pmt.string_to_symbol('tag3')
+ testtag3.value = pmt.from_long(0)
+ testtag4 = gr.gr_tag_t()
+ testtag4.offset = 2*len(tx_symbols)-1 # Last OFDM symbol of packet 2
+ testtag4.key = pmt.string_to_symbol('tag4')
+ testtag4.value = pmt.from_long(0)
+ src = blocks.vector_source_c(tx_symbols * 2, False, 1,
+ (tag1, tag2, testtag1, testtag2, testtag3, testtag4))
+ alloc = digital.ofdm_carrier_allocator_cvc(fft_len,
+ occupied_carriers,
+ pilot_carriers,
+ pilot_symbols, (),
+ tag_name,
+ False)
+ sink = blocks.vector_sink_c(fft_len)
+ self.tb.connect(src, alloc, sink)
+ self.tb.run ()
+ self.assertEqual(sink.data(), expected_result * 2)
+ tags_found = {'tag1': False, 'tag2': False, 'tag3': False, 'tag4': False}
+ correct_offsets = {'tag1': 0, 'tag2': 1, 'tag3': 3, 'tag4': 5}
+ for tag in sink.tags():
+ key = pmt.symbol_to_string(tag.key)
+ if key in tags_found.keys():
+ tags_found[key] = True
+ self.assertEqual(correct_offsets[key], tag.offset)
+ if key == tag_name:
+ self.assertTrue(tag.offset == 0 or tag.offset == 3)
+ self.assertTrue(pmt.to_long(tag.value) == 3)
+ self.assertTrue(all(tags_found.values()))
+
+
+if __name__ == '__main__':
+ gr_unittest.run(qa_digital_carrier_allocator_cvc, "qa_digital_carrier_allocator_cvc.xml")
+
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