From 43819f0f33498239970b4479684f12aa080859e6 Mon Sep 17 00:00:00 2001
From: jcorgan <jcorgan@221aa14e-8319-0410-a670-987f0aec2ac5>
Date: Thu, 26 Apr 2007 22:51:48 +0000
Subject: Merged r4518:5130 from developer branch n4hy/ofdm into trunk, passes
distcheck.
Adds incomplete OFDM implementation, further work to be completed in the
features/ofdm branch.
git-svn-id: http://gnuradio.org/svn/gnuradio/trunk@5131 221aa14e-8319-0410-a670-987f0aec2ac5
---
gnuradio-examples/python/ofdm/transmit_path.py | 104 +++++++++++++++++++++++++
1 file changed, 104 insertions(+)
create mode 100644 gnuradio-examples/python/ofdm/transmit_path.py
(limited to 'gnuradio-examples/python/ofdm/transmit_path.py')
diff --git a/gnuradio-examples/python/ofdm/transmit_path.py b/gnuradio-examples/python/ofdm/transmit_path.py
new file mode 100644
index 0000000000..308ec0851f
--- /dev/null
+++ b/gnuradio-examples/python/ofdm/transmit_path.py
@@ -0,0 +1,104 @@
+#
+# Copyright 2005,2006 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 2, 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, gru, blks
+from gnuradio import usrp
+from gnuradio import eng_notation
+
+import copy
+import sys
+
+# from current dir
+import ofdm
+
+# /////////////////////////////////////////////////////////////////////////////
+# transmit path
+# /////////////////////////////////////////////////////////////////////////////
+
+class transmit_path(gr.hier_block):
+ def __init__(self, fg, options):
+ '''
+ See below for what options should hold
+ '''
+
+ options = copy.copy(options) # make a copy so we can destructively modify
+
+ self._verbose = options.verbose
+ self._tx_amplitude = options.tx_amplitude # digital amplitude sent to USRP
+
+ self.ofdm_mod = ofdm.ofdm_mod(fg, options)
+ self.packet_transmitter = \
+ blks.mod_ofdm_pkts(fg,
+ self.ofdm_mod,
+ access_code=None,
+ msgq_limit=4,
+ pad_for_usrp=True)
+
+ self.amp = gr.multiply_const_cc(1)
+ self.set_tx_amplitude(self._tx_amplitude)
+
+ # Display some information about the setup
+ if self._verbose:
+ self._print_verbage()
+
+ # Create and setup transmit path flow graph
+ fg.connect(self.packet_transmitter, self.amp)
+ gr.hier_block.__init__(self, fg, None, self.amp)
+
+ def set_tx_amplitude(self, ampl):
+ """
+ Sets the transmit amplitude sent to the USRP
+ @param: ampl 0 <= ampl < 32768. Try 8000
+ """
+ self._tx_amplitude = max(0.0, min(ampl, 32767.0))
+ self.amp.set_k(self._tx_amplitude)
+
+ def send_pkt(self, payload='', eof=False):
+ """
+ Calls the transmitter method to send a packet
+ """
+ return self.packet_transmitter.send_pkt(payload, eof)
+
+ def bitrate(self):
+ return self._bitrate
+
+ def samples_per_symbol(self):
+ return self._samples_per_symbol
+
+ def add_options(normal, expert):
+ """
+ Adds transmitter-specific options to the Options Parser
+ """
+ normal.add_option("", "--tx-amplitude", type="eng_float", default=12000, metavar="AMPL",
+ help="set transmitter digital amplitude: 0 <= AMPL < 32768 [default=%default]")
+ normal.add_option("-v", "--verbose", action="store_true", default=False)
+ expert.add_option("", "--log", action="store_true", default=False,
+ help="Log all parts of flow graph to file (CAUTION: lots of data)")
+
+ # Make a static method to call before instantiation
+ add_options = staticmethod(add_options)
+
+ def _print_verbage(self):
+ """
+ Prints information about the transmit path
+ """
+ print "Tx amplitude %s" % (self._tx_amplitude)
+
--
cgit v1.2.3