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-rw-r--r--gnuradio-examples/python/ofdm/Makefile.am2
-rwxr-xr-xgnuradio-examples/python/ofdm/benchmark_ofdm.py148
-rw-r--r--gnuradio-examples/python/ofdm/ofdm.py161
-rwxr-xr-xgnuradio-examples/python/ofdm/ofdm_mod_demod_test.py179
-rw-r--r--gnuradio-examples/python/ofdm/ofdm_receiver.py147
-rw-r--r--gnuradio-examples/python/ofdm/ofdm_sync.m28
-rw-r--r--gnuradio-examples/python/ofdm/receive_path.py35
-rw-r--r--gnuradio-examples/python/ofdm/transmit_path.py17
8 files changed, 290 insertions, 427 deletions
diff --git a/gnuradio-examples/python/ofdm/Makefile.am b/gnuradio-examples/python/ofdm/Makefile.am
index 23df3f9d6..cbaa45b5c 100644
--- a/gnuradio-examples/python/ofdm/Makefile.am
+++ b/gnuradio-examples/python/ofdm/Makefile.am
@@ -25,8 +25,6 @@ EXTRA_DIST = \
benchmark_ofdm_tx.py \
fftshift.py \
fusb_options.py \
- ofdm.py \
- ofdm_receiver.py \
pick_bitrate.py \
receive_path.py \
transmit_path.py
diff --git a/gnuradio-examples/python/ofdm/benchmark_ofdm.py b/gnuradio-examples/python/ofdm/benchmark_ofdm.py
index 3b4761d5e..53f4bd0bf 100755
--- a/gnuradio-examples/python/ofdm/benchmark_ofdm.py
+++ b/gnuradio-examples/python/ofdm/benchmark_ofdm.py
@@ -1,6 +1,6 @@
#!/usr/bin/env python
#
-# Copyright 2005, 2006 Free Software Foundation, Inc.
+# Copyright 2006, 2007 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
@@ -20,90 +20,68 @@
# Boston, MA 02110-1301, USA.
#
-from gnuradio import gr, gru, modulation_utils
-from gnuradio import usrp
+from gnuradio import gr, blks
from gnuradio import eng_notation
from gnuradio.eng_option import eng_option
from optparse import OptionParser
+from gnuradio.blksimpl import ofdm_pkt
import random, time, struct, sys, math, os
# from current dir
from transmit_path import transmit_path
from receive_path import receive_path
-import ofdm
-class awgn_channel(gr.hier_block):
- def __init__(self, fg, sample_rate, noise_voltage, frequency_offset):
-
- self.input = gr.add_const_cc(0)
-
- self.noise_adder = gr.add_cc()
- self.noise = gr.noise_source_c(gr.GR_GAUSSIAN,noise_voltage)
- self.offset = gr.sig_source_c(1, gr.GR_SIN_WAVE, frequency_offset, 1.0, 0.0)
- self.mixer_offset = gr.multiply_cc()
-
- fg.connect(self.input, (self.mixer_offset,0))
- fg.connect(self.offset,(self.mixer_offset,1))
- fg.connect(self.mixer_offset, (self.noise_adder,1))
- fg.connect(self.noise, (self.noise_adder,0))
-
- gr.hier_block.__init__(self, fg, self.input, self.noise_adder)
-
-class multipath_channel(gr.hier_block):
- def __init__(self, fg):
-
- self.taps = [1.0, .2, 0.0, .1, .08, -.4, .12, -.2, 0, 0, 0, .3]
- self.chan = gr.fir_filter_ccc(1, self.taps)
-
- gr.hier_block.__init__(self, fg, self.chan, self.chan)
class my_graph(gr.flow_graph):
def __init__(self, callback, options):
gr.flow_graph.__init__(self)
- channel_on = True
-
- SNR = 10.0**(options.snr/10.0)
- frequency_offset = options.frequency_offset / options.fft_length
-
- power_in_signal = options.occupied_tones
- noise_power_in_channel = power_in_signal/SNR
- noise_power_required = noise_power_in_channel * options.fft_length / options.occupied_tones
- noise_voltage = math.sqrt(noise_power_required)
-
- self.txpath = transmit_path(self, options)
- self.throttle = gr.throttle(gr.sizeof_gr_complex, options.sample_rate)
- self.rxpath = receive_path(self, callback, options)
-
- if channel_on:
- self.channel = awgn_channel(self, options.sample_rate, noise_voltage, frequency_offset)
- self.multipath = multipath_channel(self)
+ if options.channel_on:
+ SNR = 10.0**(options.snr/10.0)
+ power_in_signal = 1.0
+ noise_power_in_channel = power_in_signal/SNR
+ noise_voltage = math.sqrt(noise_power_in_channel/2.0)
+ print "Noise voltage: ", noise_voltage
- if options.discontinuous:
- z = 20000*[0,]
- self.zeros = gr.vector_source_c(z, True)
- packet_size = 15*((4+8+4+1500+4) * 8)
- self.mux = gr.stream_mux(gr.sizeof_gr_complex, [packet_size-0, int(10e5)])
-
- # Connect components
- self.connect(self.txpath, (self.mux,0))
- self.connect(self.zeros, (self.mux,1))
- self.connect(self.mux, self.throttle, self.channel, self.rxpath)
- self.connect(self.mux, gr.file_sink(gr.sizeof_gr_complex, "tx_ofdm.dat"))
+ frequency_offset = options.frequency_offset / options.fft_length
+ if options.multipath_on:
+ taps = [1.0, .2, 0.0, .1, .08, -.4, .12, -.2, 0, 0, 0, .3]
else:
- #self.connect(self.txpath, self.throttle, self.multipath, self.channel)
- self.connect(self.txpath, self.throttle, self.channel)
- self.connect(self.channel, self.rxpath)
- self.connect(self.txpath, gr.file_sink(gr.sizeof_gr_complex, "tx_ofdm.dat"))
-
+ taps = [1.0, 0.0]
+
+ else:
+ noise_voltage = 0.0
+ frequency_offset = 0.0
+ taps = [1.0, 0.0]
+
+ symbols_per_packet = math.ceil(((4+options.size+4) * 8) / options.occupied_tones)
+ samples_per_packet = (symbols_per_packet+2) * (options.fft_length+options.cp_length)
+ print "Symbols per Packet: ", symbols_per_packet
+ print "Samples per Packet: ", samples_per_packet
+ if options.discontinuous:
+ stream_size = [100000, int(options.discontinuous*samples_per_packet)]
else:
- self.connect(self.txpath, self.throttle, self.rxpath)
- self.connect(self.txpath, gr.file_sink(gr.sizeof_gr_complex, "tx"))
- self.connect(self.rxpath.ofdm_demod.ofdm_rx, gr.file_sink(options.fft_length*gr.sizeof_gr_complex, "rx"))
+ stream_size = [0, 100000]
+ z = [0,]
+ self.zeros = gr.vector_source_c(z, True)
+ self.txpath = transmit_path(self, options)
+ self.mux = gr.stream_mux(gr.sizeof_gr_complex, stream_size)
+ self.throttle = gr.throttle(gr.sizeof_gr_complex, options.sample_rate)
+ self.channel = blks.channel_model(self, noise_voltage, frequency_offset, options.clockrate_ratio, taps)
+ self.rxpath = receive_path(self, callback, options)
+
+ self.connect(self.zeros, (self.mux,0))
+ self.connect(self.txpath, (self.mux,1))
+ self.connect(self.mux, self.throttle, self.channel, self.rxpath)
+
+ self.connect(self.txpath, gr.file_sink(gr.sizeof_gr_complex, "txpath.dat"))
+ self.connect(self.mux, gr.file_sink(gr.sizeof_gr_complex, "mux.dat"))
+ self.connect(self.channel, gr.file_sink(gr.sizeof_gr_complex, "channel.dat"))
+
# /////////////////////////////////////////////////////////////////////////////
# main
# /////////////////////////////////////////////////////////////////////////////
@@ -124,6 +102,17 @@ def main():
if ok:
n_right += 1
print "ok: %r \t pktno: %d \t n_rcvd: %d \t n_right: %d" % (ok, pktno, n_rcvd, n_right)
+
+ printlst = list()
+ for x in payload[2:]:
+ t = hex(ord(x)).replace('0x', '')
+ if(len(t) == 1):
+ t = '0' + t
+ printlst.append(t)
+ printable = ''.join(printlst)
+
+ print printable
+ print "\n"
parser = OptionParser(option_class=eng_option, conflict_handler="resolve")
expert_grp = parser.add_option_group("Expert")
@@ -137,21 +126,22 @@ def main():
help="set the SNR of the channel in dB [default=%default]")
parser.add_option("", "--frequency-offset", type="eng_float", default=0,
help="set frequency offset introduced by channel [default=%default]")
- parser.add_option("","--discontinuous", action="store_true", default=False,
- help="enable discontinous transmission (bursts of 5 packets)")
+ parser.add_option("", "--clockrate-ratio", type="eng_float", default=1.0,
+ help="set clock rate ratio (sample rate difference) between two systems [default=%default]")
+ parser.add_option("","--discontinuous", type="int", default=0,
+ help="enable discontinous transmission, burst of N packets [Default is continuous]")
+ parser.add_option("","--channel-on", action="store_true", default=True,
+ help="Enables AWGN, freq offset")
+ parser.add_option("","--multipath-on", action="store_true", default=False,
+ help="enable multipath")
transmit_path.add_options(parser, expert_grp)
receive_path.add_options(parser, expert_grp)
- ofdm.ofdm_mod.add_options(parser, expert_grp)
- ofdm.ofdm_demod.add_options(parser, expert_grp)
+ ofdm_pkt.mod_ofdm_pkts.add_options(parser, expert_grp)
+ ofdm_pkt.demod_ofdm_pkts.add_options(parser, expert_grp)
(options, args) = parser.parse_args ()
-
- if(options.mtu < options.size):
- sys.stderr.write("MTU (%.0f) must be larger than the packet size (%.0f)\n"
- % (options.mtu, options.size))
- sys.exit(1)
-
+
# build the graph
fg = my_graph(rx_callback, options)
@@ -167,12 +157,12 @@ def main():
pktno = 0
pkt_size = int(options.size)
-
-
while n < nbytes:
- r = ''.join([chr(random.randint(0,255)) for i in range(pkt_size-2)])
- #pkt_contents = struct.pack('!H', pktno) + (pkt_size - 2) * chr(pktno & 0xff)
- pkt_contents = struct.pack('!H', pktno) + r
+ #r = ''.join([chr(random.randint(0,255)) for i in range(pkt_size-2)])
+ #pkt_contents = struct.pack('!H', pktno) + r
+
+ pkt_contents = struct.pack('!H', pktno) + (pkt_size - 2) * chr(pktno & 0xff)
+
send_pkt(pkt_contents)
n += pkt_size
#sys.stderr.write('.')
diff --git a/gnuradio-examples/python/ofdm/ofdm.py b/gnuradio-examples/python/ofdm/ofdm.py
deleted file mode 100644
index 8b1e616f9..000000000
--- a/gnuradio-examples/python/ofdm/ofdm.py
+++ /dev/null
@@ -1,161 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2004,2005,2006 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
-from optparse import OptionParser
-from ofdm_receiver import ofdm_receiver
-
-class ofdm_mod(gr.hier_block):
- def __init__(self, fg, options):
- self.fg = fg
- self._occupied_tones = options.occupied_tones
- self._fft_length = options.fft_length
- self._cp_length = options.cp_length
- self._mtu = options.mtu
-
- symbol_length = self._fft_length + self._cp_length
-
- if self._fft_length < self._occupied_tones:
- sys.stderr.write("occupied tones must be less than FFT length\n")
- raise SystemExit
- if self._fft_length < self._cp_length:
- sys.stderr.write("cyclic prefix length must be less than FFT length\n")
- raise SystemExit
-
- win = [] #[1 for i in range(self._fft_length)]
-
- # hard-coded known symbol
- #ks = self._occupied_tones*[1,]
- ks1 = known_symbols_200_1
- ks2 = known_symbols_200_2
-
- self.ofdm = gr.ofdm_bpsk_mapper(self._mtu, self._occupied_tones, self._fft_length, ks1, ks2)
- self.ifft = gr.fft_vcc(self._fft_length, False, win, True)
- self.cp_adder = gr.ofdm_cyclic_prefixer(self._fft_length, symbol_length)
-
- if options.verbose:
- self._print_verbage()
-
- self.fg.connect(self.ofdm, self.ifft, self.cp_adder)
- gr.hier_block.__init__(self, self.fg, self.ofdm, self.cp_adder)
-
- def samples_per_symbol(self):
- return 2
-
- def mtu(self):
- return self._mtu
-
- def bits_per_symbol(self=None): # staticmethod that's also callable on an instance
- return 1
- bits_per_symbol = staticmethod(bits_per_symbol) # make it a static method. RTFM
-
- def add_options(normal, expert):
- """
- Adds OFDM-specific options to the Options Parser
- """
- expert.add_option("", "--mtu", type="int", default=1500,
- help="set maximum transmit unit [default=%default]")
- expert.add_option("", "--fft-length", type="intx", default=512,
- help="set the number of FFT bins [default=%default]")
- expert.add_option("", "--occupied-tones", type="intx", default=200,
- help="set the number of occupied FFT bins [default=%default]")
- expert.add_option("", "--cp-length", type="intx", default=128,
- help="set the number of bits in the cyclic prefix [default=%default]")
- # Make a static method to call before instantiation
- add_options = staticmethod(add_options)
-
- def _print_verbage(self):
- """
- Prints information about the OFDM modulator
- """
- print "\nOFDM Modulator:"
- print "FFT length: %3d" % (self._fft_length)
- print "Occupied Tones: %3d" % (self._occupied_tones)
- print "CP length: %3d" % (self._cp_length)
-
-
-class ofdm_demod(gr.hier_block):
- def __init__(self, fg, options):
- self.fg = fg
- self._occupied_tones = options.occupied_tones
- self._fft_length = options.fft_length
- self._cp_length = options.cp_length
- self._snr = options.snr
-
- symbol_length = self._fft_length + self._cp_length
-
- win = [1 for i in range(self._fft_length)]
-
- # hard-coded known symbol
- ks1 = known_symbols_200_1
- ks2 = known_symbols_200_2
-
- # ML Sync
- self.ofdm_sync = ofdm_receiver(self.fg, self._fft_length, symbol_length, self._snr)
-
- # OFDM Demod
- self.fft_demod = gr.fft_vcc(self._fft_length, True, win, True)
- self.ofdm_corr = gr.ofdm_correlator(self._occupied_tones, self._fft_length,
- self._cp_length, ks1, ks2)
- self.ofdm_demod = gr.ofdm_bpsk_demapper(self._occupied_tones)
-
-
- if options.verbose:
- self._print_verbage()
-
- self.fg.connect(self.ofdm_sync, self.fft_demod, self.ofdm_corr, self.ofdm_demod)
- gr.hier_block.__init__(self, self.fg, self.ofdm_sync, self.ofdm_demod)
-
- def bits_per_symbol(self=None): # staticmethod that's also callable on an instance
- return 1
- bits_per_symbol = staticmethod(bits_per_symbol) # make it a static method. RTFM
-
- def add_options(normal, expert):
- """
- Adds OFDM-specific options to the Options Parser
- """
- expert.add_option("", "--fft-length", type="intx", default=512,
- help="set the number of FFT bins [default=%default]")
- expert.add_option("", "--occupied-tones", type="intx", default=200,
- help="set the number of occupied FFT bins [default=%default]")
- expert.add_option("", "--cp-length", type="intx", default=128,
- help="set the number of bits in the cyclic prefix [default=%default]")
- # Make a static method to call before instantiation
- add_options = staticmethod(add_options)
-
- def _print_verbage(self):
- """
- Prints information about the OFDM demodulator
- """
- print "\nOFDM Demodulator:"
- print "FFT length: %3d" % (self._fft_length)
- print "Occupied Tones: %3d" % (self._occupied_tones)
- print "CP length: %3d" % (self._cp_length)
-
-
-# generated in python using:
-# import random
-# pn = [2.0*random.randint(0,1)-1.0 for i in range(self._occupied_tones)]
-
-known_symbols_200_1 = [1.0, 1.0, -1.0, 1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, 1.0, -1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, -1.0, 1.0, -1.0, 1.0, -1.0, -1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, -1.0, -1.0, -1.0, -1.0, 1.0, -1.0, -1.0, -1.0, -1.0, 1.0, -1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, 1.0, -1.0, 1.0, 1.0, -1.0, 1.0, -1.0, -1.0, -1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, -1.0, 1.0, -1.0, -1.0, -1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, -1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, -1.0, -1.0, -1.0, -1.0, 1.0, -1.0, -1.0, -1.0, 1.0, -1.0, -1.0, -1.0, 1.0, 1.0, -1.0, 1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, 1.0, 1.0, -1.0]
-
-known_symbols_200_2 = [-1.0, -1.0, -1.0, 1.0, 1.0, 1.0, -1.0, -1.0, -1.0, 1.0, 1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, -1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, -1.0, -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, 1.0, -1.0, -1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, -1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, 1.0, -1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, -1.0, -1.0, -1.0, -1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, -1.0, -1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, 1.0, -1.0, -1.0, 1.0, 1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, 1.0, 1.0, 1.0, -1.0, 1.0, 1.0, -1.0, 1.0, -1.0, -1.0, -1.0, 1.0, 1.0, -1.0, -1.0, 1.0, 1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, -1.0, -1.0, 1.0, -1.0, -1.0, -1.0, 1.0, 1.0, 1.0, -1.0, -1.0, 1.0, -1.0, 1.0, -1.0, 1.0, -1.0, -1.0, -1.0, -1.0, -1.0, 1.0, -1.0, -1.0, -1.0, 1.0, 1.0, 1.0]
diff --git a/gnuradio-examples/python/ofdm/ofdm_mod_demod_test.py b/gnuradio-examples/python/ofdm/ofdm_mod_demod_test.py
new file mode 100755
index 000000000..5fe81a538
--- /dev/null
+++ b/gnuradio-examples/python/ofdm/ofdm_mod_demod_test.py
@@ -0,0 +1,179 @@
+#!/usr/bin/env python
+#
+# 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, ofdm_packet_utils
+import gnuradio.gr.gr_threading as _threading
+from gnuradio import eng_notation
+from gnuradio.eng_option import eng_option
+from optparse import OptionParser
+
+import random, time, struct, sys, math, os
+
+class my_graph(gr.flow_graph):
+ def __init__(self, callback, options):
+ gr.flow_graph.__init__(self)
+
+ # hard-coded known symbol
+ ks1 = known_symbols_4512_1[0:options.occupied_tones]
+ ks2 = known_symbols_4512_2[0:options.occupied_tones]
+
+ self._rcvd_pktq = gr.msg_queue()
+
+ # accepts messages from the outside world
+ self.ofdm_mapper = gr.ofdm_bpsk_mapper(4, options.occupied_tones, options.fft_length, ks1, ks2)
+ self.ofdm_corr = gr.ofdm_correlator(options.occupied_tones, options.fft_length, 0, ks1, ks2)
+ self.ofdm_framer = gr.ofdm_frame_sink(self._rcvd_pktq, options.occupied_tones)
+
+ if 0: # set to 1 to put the correlator in the path to take over the signalling
+ self.connect((self.ofdm_mapper, 0), (self.ofdm_corr, 0))
+ self.connect((self.ofdm_corr, 0), (self.ofdm_framer, 0))
+ self.connect((self.ofdm_corr, 1), (self.ofdm_framer, 1))
+
+ self.connect((self.ofdm_mapper,0), gr.file_sink(gr.sizeof_gr_complex*options.fft_length, "ofdm_mapper.dat"))
+ self.connect((self.ofdm_corr,0), gr.file_sink(gr.sizeof_gr_complex*options.occupied_tones, "ofdm_corr.dat"))
+ self.connect((self.ofdm_corr,1), gr.file_sink(gr.sizeof_char, "ofdm_sig.dat"))
+
+ else:
+ self.connect((self.ofdm_mapper, 0), (self.ofdm_framer, 0))
+ self.connect((self.ofdm_mapper, 1), (self.ofdm_framer, 1))
+
+ self.connect((self.ofdm_mapper,0), gr.file_sink(gr.sizeof_gr_complex*options.fft_length, "ofdm_mapper.dat"))
+ self.connect((self.ofdm_mapper,1), gr.file_sink(gr.sizeof_char, "ofdm_sig.dat"))
+
+ self._watcher = _queue_watcher_thread(self._rcvd_pktq, callback)
+
+ def send_pkt(self, payload='', eof=False):
+ if eof:
+ msg = gr.message(1)
+ else:
+ pkt = ofdm_packet_utils.make_packet(payload, 1, 1, False, whiten=False)
+ msg = gr.message_from_string(pkt)
+ self.ofdm_mapper.msgq().insert_tail(msg)
+
+class _queue_watcher_thread(_threading.Thread):
+ def __init__(self, rcvd_pktq, callback):
+ _threading.Thread.__init__(self)
+ self.setDaemon(1)
+ self.rcvd_pktq = rcvd_pktq
+ self.callback = callback
+ self.keep_running = True
+ self.start()
+
+ def run(self):
+ while self.keep_running:
+ msg = self.rcvd_pktq.delete_head()
+ ok, payload = ofdm_packet_utils.unmake_packet(msg.to_string(), whiten=False)
+ if self.callback:
+ self.callback(ok, payload)
+
+# /////////////////////////////////////////////////////////////////////////////
+# main
+# /////////////////////////////////////////////////////////////////////////////
+
+def main():
+ ''' Use this program to tie the OFDM modulators straight into the frame sink, with or without
+ the correlator in between. This is for testing of the modulators and demodulators only without
+ receiver and sync functionality.'''
+
+ global n_rcvd, n_right
+
+ n_rcvd = 0
+ n_right = 0
+
+ def send_pkt(payload='', eof=False):
+ return fg.send_pkt(payload, eof)
+
+ def rx_callback(ok, payload):
+ global n_rcvd, n_right
+ n_rcvd += 1
+ (pktno,) = struct.unpack('!H', payload[0:2])
+ if ok:
+ n_right += 1
+ print "ok: %r \t pktno: %d \t n_rcvd: %d \t n_right: %d" % (ok, pktno, n_rcvd, n_right)
+
+ printlst = list()
+ for x in payload[2:]:
+ t = hex(ord(x)).replace('0x', '')
+ if(len(t) == 1):
+ t = '0' + t
+ printlst.append(t)
+ printable = ''.join(printlst)
+
+ print printable
+ print "\n"
+
+ parser = OptionParser(option_class=eng_option, conflict_handler="resolve")
+ expert = parser.add_option_group("Expert")
+ parser.add_option("-s", "--size", type="eng_float", default=1450,
+ help="set packet size [default=%default]")
+ parser.add_option("-M", "--megabytes", type="eng_float", default=1.0,
+ help="set megabytes to transmit [default=%default]")
+ expert.add_option("", "--fft-length", type="intx", default=512,
+ help="set the number of FFT bins [default=%default]")
+ expert.add_option("", "--occupied-tones", type="intx", default=200,
+ help="set the number of occupied FFT bins [default=%default]")
+ expert.add_option("", "--cp-length", type="intx", default=128,
+ help="set the number of bits in the cyclic prefix [default=%default]")
+ expert.add_option("", "--fft-length", type="intx", default=512,
+ help="set the number of FFT bins [default=%default]")
+ expert.add_option("", "--occupied-tones", type="intx", default=200,
+ help="set the number of occupied FFT bins [default=%default]")
+ expert.add_option("", "--cp-length", type="intx", default=128,
+ help="set the number of bits in the cyclic prefix [default=%default]")
+
+ (options, args) = parser.parse_args ()
+
+ # build the graph
+ fg = my_graph(rx_callback, options)
+
+ fg.start() # start flow graph
+
+ # generate and send packets
+ nbytes = int(1e6 * options.megabytes)
+ n = 0
+ pktno = 0
+ pkt_size = int(options.size)
+
+ while n < nbytes:
+ #r = ''.join([chr(random.randint(0,255)) for i in range(pkt_size-2)])
+ #pkt_contents = struct.pack('!H', pktno) + r
+
+ pkt_contents = struct.pack('!H', pktno) + (pkt_size - 2) * chr(pktno & 0xff)
+
+ send_pkt(pkt_contents)
+ n += pkt_size
+ pktno += 1
+
+ send_pkt(eof=True)
+ fg.wait() # wait for it to finish
+
+known_symbols_4512_1 = [-1, 1, 1, 1, -1, -1, 1, -1, 1, -1, 1, 1, 1, 1, 1, -1, -1, 1, 1, -1, -1, 1, 1, -1, 1, -1, 1, -1, 1, 1, -1, -1, 1, 1, 1, 1, -1, 1, 1, -1, -1, 1, 1, -1, -1, 1, -1, 1, -1, -1, 1, -1, 1, 1, 1, 1, 1, 1, 1, -1, -1, -1, 1, -1, 1, 1, -1, 1, 1, 1, 1, 1, -1, -1, -1, 1, 1, -1, -1, 1, -1, -1, 1, 1, -1, 1, -1, -1, -1, -1, 1, 1, -1, 1, 1, 1, 1, 1, -1, 1, -1, -1, -1, 1, 1, -1, 1, -1, 1, 1, -1, 1, -1, 1, 1, -1, 1, 1, 1, -1, -1, -1, 1, -1, -1, -1, 1, 1, 1, -1, -1, -1, -1, 1, -1, 1, 1, -1, 1, -1, 1, -1, -1, -1, -1, -1, -1, -1, 1, 1, -1, 1, -1, -1, -1, 1, -1, 1, -1, 1, -1, 1, -1, -1, -1, -1, 1, -1, -1, -1, 1, -1, -1, -1, -1, -1, -1, -1, 1, 1, -1, -1, 1, 1, -1, 1, -1, -1, -1, 1, 1, 1, -1, 1, -1, 1, -1, 1, -1, 1, 1, -1, -1, 1, 1, 1, -1, -1, 1, 1, -1, 1, -1, -1, 1, 1, -1, -1, 1, -1, -1, -1, 1, -1, 1, -1, 1, 1, -1, 1, 1, 1, 1, -1, 1, 1, -1, 1, -1, 1, 1, -1, -1, 1, -1, -1, 1, -1, 1, -1, 1, -1, 1, 1, -1, -1, 1, 1, 1, -1, 1, -1, 1, 1, 1, 1, 1, 1, -1, 1, -1, 1, -1, -1, -1, 1, -1, 1, -1, 1, 1, -1, 1, -1, 1, -1, -1, -1, 1, -1, 1, -1, 1, -1, -1, -1, -1, 1, -1, -1, -1, 1, 1, 1, -1, 1, 1, 1, -1, -1, 1, 1, -1, -1, -1, 1, -1, -1, -1, -1, -1, -1, 1, -1, 1, -1, 1, -1, 1, -1, -1, -1, 1, -1, -1, 1, 1, -1, 1, 1, 1, 1, 1, 1, -1, 1, -1, -1, 1, -1, -1, 1, 1, 1, -1, 1, 1, 1, 1, 1, -1, 1, -1, -1, -1, -1, -1, -1, 1, 1, 1, 1, 1, -1, 1, 1, 1, 1, -1, -1, -1, 1, -1, -1, 1, 1, -1, -1, 1, -1, -1, -1, 1, -1, 1, -1, -1, 1, 1, -1, 1, 1, 1, -1, 1, 1, 1, -1, -1, -1, -1, -1, -1, -1, 1, 1, -1, 1, 1, -1, 1, 1, -1, 1, -1, 1, -1, -1, -1, -1, -1, 1, -1, 1, 1, 1, 1, -1, 1, -1, 1, -1, -1, 1, 1, -1, 1, -1, 1, 1, 1, 1, 1, 1, -1, 1, 1, -1, 1, 1, 1, 1, 1, 1, -1, 1, 1, 1, -1, -1, 1, -1, -1, 1, 1, 1, 1, 1, -1, -1, -1, 1, -1, -1, -1, 1, 1, 1, 1, -1, 1, 1, 1, 1, 1, 1, 1, -1, 1, -1, 1, -1, 1, -1, 1, -1, 1, 1, -1, 1, 1, 1, 1, 1, 1, -1, -1, 1, 1, 1, -1, -1, 1, -1, -1, -1, 1, -1, -1, 1, 1, -1, -1, -1, -1, 1, 1, 1, -1, -1, 1, 1, -1, -1, 1, 1, 1, 1, 1, -1, 1, -1, -1, 1, 1, 1, 1, -1, -1, -1, -1, -1, 1, -1, 1, -1, -1, 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-1, -1, -1, 1, 1, -1, -1, 1, 1, 1, 1, -1, -1, -1, -1, -1, 1, -1, 1, -1, -1, 1, -1, -1, -1, -1, -1, 1, -1, -1, -1, 1, -1, -1, -1, 1, -1, 1, -1, 1, 1, -1, -1, 1, -1, 1, 1, 1, 1, -1, -1, -1, 1, 1, 1, -1, 1, -1, -1, 1, -1, 1, -1, -1, -1, -1, -1, -1, -1, -1, 1, -1, 1, -1, -1, -1, -1, -1, -1, 1, -1, 1, -1, 1, 1, 1, -1, -1, 1, -1, -1, 1, 1, -1, -1, 1, 1, -1, -1, -1, 1, 1, 1, -1, 1, 1, 1, 1, 1, 1, -1, 1, 1, -1, 1, -1, 1, -1, 1, -1, -1, 1, -1, -1, 1, -1, -1, 1, 1, 1, -1, -1, 1, -1, -1, -1, -1, -1, 1, 1, 1, 1, -1, -1, -1, 1, -1, -1, 1, 1, 1, 1, -1, 1, 1, 1, 1, -1, 1, 1, -1, -1, -1, 1, -1, 1, -1, -1, 1, -1, -1, 1, 1, -1, 1, -1, 1, -1, 1, 1, -1, -1, -1, -1, -1, -1, -1, 1, -1, -1, 1, -1, 1, -1, 1, 1, 1, 1, -1, -1, -1, 1, 1, -1, -1, 1, 1, 1, 1, 1, 1, -1, -1, 1, -1, 1, 1, 1, 1, 1, 1, -1, -1, 1, -1, -1, 1, 1, -1, 1, 1, 1, 1, 1, -1, 1, 1, 1, 1, -1, 1, -1, -1, 1, 1, -1, -1, -1, -1, -1, -1, 1, -1, 1, -1, 1, 1, 1, -1, -1, 1, -1, 1, 1, 1, 1, 1, 1, 1, -1, 1, 1, 1, 1, 1, -1, -1, 1, -1, 1, 1, -1, 1, -1, 1, 1, -1, 1, 1, -1, -1, 1, -1, -1, -1, -1, -1, 1, -1, 1, -1, 1, 1, -1, 1, -1, 1, -1, -1, -1, 1, -1, 1, -1, -1, -1, -1, 1, -1, 1, 1, -1, 1, -1, -1, 1, -1, -1, -1, 1, 1, -1, -1, -1, -1, 1, -1, -1, 1, 1, 1, 1, -1, -1, -1, 1, -1, -1, -1, -1, 1, 1, 1, 1, 1, -1, -1, 1, 1, -1, -1, 1, 1, -1, 1, 1, -1, -1, -1, 1, -1, -1, -1, -1, -1, -1, 1, -1, -1, 1, 1, -1, -1, -1, -1, -1, 1, 1, -1, 1, 1, 1, 1, -1, 1, -1, -1, -1, 1, 1, -1, 1, -1, 1, 1, -1, -1, 1, -1, 1, 1, -1, 1, 1, 1, 1, 1, 1, -1, -1, -1, 1, -1, -1, 1, 1, -1, -1, -1, -1, -1, -1, -1, 1, -1, -1, 1, -1, 1, -1, 1, -1, 1, 1, 1, 1, -1, -1, -1, 1, 1, -1, 1, -1, -1, -1, -1, -1, 1, 1, 1, 1, 1, -1, -1, 1, -1, 1, -1, -1, -1, -1, -1, 1, 1, -1, -1, 1, 1, -1, -1, 1, -1, 1, 1, 1, 1, -1, -1, 1, 1, -1, -1, -1, 1, -1, -1, -1, 1, 1, 1, 1, -1, -1]
+
+
+if __name__ == '__main__':
+ try:
+ main()
+ except KeyboardInterrupt:
+ pass
+
diff --git a/gnuradio-examples/python/ofdm/ofdm_receiver.py b/gnuradio-examples/python/ofdm/ofdm_receiver.py
deleted file mode 100644
index 467e3af05..000000000
--- a/gnuradio-examples/python/ofdm/ofdm_receiver.py
+++ /dev/null
@@ -1,147 +0,0 @@
-#!/usr/bin/env python
-#
-# Copyright 2004,2005,2006 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.
-#
-
-import math
-from gnuradio import gr
-from gnuradio import audio
-from gnuradio.eng_option import eng_option
-from optparse import OptionParser
-
-class ofdm_receiver(gr.hier_block):
- def __init__(self, fg, fft_length, symbol_length, snr):
- self.input = gr.add_const_cc(0) # Kluge that goes away with hier_block2
-
- self.fg = fg
-
- cpsize = symbol_length - fft_length;
-
- SNR = 10.0**(snr/10.0)
- rho = SNR / (SNR + 1.0)
-
- # ML Sync
-
- # Energy Detection from ML Sync
-
- # Create a delay line
- delayline = [0.0 for i in range(fft_length+1)]
- delayline[fft_length] = 1.0
- self.delay = gr.fir_filter_ccf(1,delayline)
- self.fg.connect(self.input, self.delay)
-
- # magnitude squared blocks
- self.magsqrd1 = gr.complex_to_mag_squared()
- self.magsqrd2 = gr.complex_to_mag_squared()
- self.adder = gr.add_ff()
-
- moving_sum_taps = [rho/2 for i in range(cpsize)]
- self.moving_sum_filter = gr.fir_filter_fff(1,moving_sum_taps)
-
- self.fg.connect(self.input,self.magsqrd1)
- self.fg.connect(self.delay,self.magsqrd2)
- self.fg.connect(self.magsqrd1,(self.adder,0))
- self.fg.connect(self.magsqrd2,(self.adder,1))
- self.fg.connect(self.adder,self.moving_sum_filter)
-
-
- # Correlation from ML Sync
- self.conjg = gr.conjugate_cc();
- self.mixer = gr.multiply_cc();
-
- movingsum2_taps = [1.0 for i in range(cpsize)]
- self.movingsum2 = gr.fir_filter_ccf(1,movingsum2_taps)
-
-
- # Correlator data handler
- self.c2mag = gr.complex_to_mag()
- self.angle = gr.complex_to_arg()
- self.fg.connect(self.input,(self.mixer,1))
- self.fg.connect(self.delay,self.conjg,(self.mixer,0))
- self.fg.connect(self.mixer,self.movingsum2,self.c2mag)
- self.fg.connect(self.movingsum2,self.angle)
-
- # ML Sync output arg, need to find maximum point of this
- self.diff = gr.sub_ff()
- self.fg.connect(self.c2mag,(self.diff,0))
- self.fg.connect(self.moving_sum_filter,(self.diff,1))
-
- #ML measurements input to sampler block and detect
- nco_sensitivity = 1.0/fft_length
- self.f2c = gr.float_to_complex()
- self.sampler = gr.ofdm_sampler(fft_length,symbol_length)
- self.pkt_detect = gr.peak_detector_ff(0.2, 0.25, 30, 0.0001)
- self.dpll = gr.dpll_ff(float(symbol_length),0.01)
- self.sample_and_hold = gr.sample_and_hold_ff()
- self.nco = gr.frequency_modulator_fc(nco_sensitivity)
- self.inv = gr.multiply_const_ff(-1)
- self.sigmix = gr.multiply_cc()
-
- # Mix the signal with an NCO controlled by the sync loop
- self.fg.connect(self.input, (self.sigmix,0))
- self.fg.connect(self.nco, (self.sigmix,1))
- self.fg.connect(self.sigmix, (self.sampler,0))
-
- sample_trigger = 0
- if sample_trigger:
- # for testing
- peak_null = gr.null_sink(gr.sizeof_float)
- data = 640*[0,]
- data[639] = 1
- peak_trigger = gr.vector_source_f(data, True)
-
- self.fg.connect(self.pkt_detect, peak_null)
- self.fg.connect(peak_trigger, self.f2c, (self.sampler,1))
- self.fg.connect(peak_trigger, (self.sample_and_hold,1))
-
- # use the sync loop values to set the sampler and the NCO
- # self.diff = theta
- # self.angle = epsilon
-
- self.fg.connect(self.diff, self.pkt_detect)
- use_dpll = 1
- if not sample_trigger:
- if use_dpll:
- self.fg.connect(self.pkt_detect, self.dpll,self.f2c, (self.sampler,1))
- self.fg.connect(self.dpll, (self.sample_and_hold,1))
- if not use_dpll:
- self.fg.connect(self.pkt_detect, self.f2c, (self.sampler,1))
- self.fg.connect(self.pkt_detect, (self.sample_and_hold,1))
-
- self.fg.connect(self.angle, (self.sample_and_hold,0))
- self.fg.connect(self.sample_and_hold, self.inv, self.nco)
-
-
- if 0:
- self.fg.connect(self.diff, gr.file_sink(gr.sizeof_float, "theta_f.dat"))
- self.fg.connect(self.angle, gr.file_sink(gr.sizeof_float, "epsilon_f.dat"))
- if use_dpll:
- self.fg.connect(self.dpll, gr.file_sink(gr.sizeof_float, "dpll_pulses.dat"))
- if sample_trigger:
- self.fg.connect(peak_trigger, gr.file_sink(gr.sizeof_float, "peaks_f.dat"))
- else:
- self.fg.connect(self.pkt_detect, gr.file_sink(gr.sizeof_float, "peaks_f.dat"))
-
- self.fg.connect(self.sample_and_hold, gr.file_sink(gr.sizeof_float, "sample_and_hold_f.dat"))
- self.fg.connect(self.nco, gr.file_sink(gr.sizeof_gr_complex, "nco_c.dat"))
- self.fg.connect(self.input, gr.file_sink(gr.sizeof_gr_complex, "input_c.dat"))
- self.fg.connect(self.sigmix, gr.file_sink(gr.sizeof_gr_complex, "output_c.dat"))
-
- gr.hier_block.__init__(self, fg, self.input, self.sampler)
diff --git a/gnuradio-examples/python/ofdm/ofdm_sync.m b/gnuradio-examples/python/ofdm/ofdm_sync.m
new file mode 100644
index 000000000..d5df42137
--- /dev/null
+++ b/gnuradio-examples/python/ofdm/ofdm_sync.m
@@ -0,0 +1,28 @@
+%
+
+function [theta, g, g1, k, h] = ofdm_sync(signal,SNR,FFTSIZE,CPLEN)
+
+ rho = SNR/(SNR+1);
+
+ d = abs(signal).^2;
+ g = [ zeros(1,FFTSIZE) signal(1:max(size(signal))-FFTSIZE) ];
+ g1 = conj(g);
+ f = abs(g).^2;
+ c = d + f;
+ moving_sum_taps = rho/2 * ones(1,CPLEN);
+ b = conv(c,moving_sum_taps);
+ b = b(1:max(size(signal)));
+ %b = b(CPLEN:max(size(b)));
+
+ k = g1 .* signal;
+
+ moving_sum_taps2 = ones(1, CPLEN);
+ h = conv(k,moving_sum_taps2);
+ h = h(1:max(size(signal)));
+ %h = h(CPLEN:max(size(h)));
+
+ a = abs(h);
+
+ theta = a-b;
+
+endfunction
diff --git a/gnuradio-examples/python/ofdm/receive_path.py b/gnuradio-examples/python/ofdm/receive_path.py
index 1c9c23844..0e44ffde0 100644
--- a/gnuradio-examples/python/ofdm/receive_path.py
+++ b/gnuradio-examples/python/ofdm/receive_path.py
@@ -28,7 +28,6 @@ import sys
# from current dir
from pick_bitrate import pick_rx_bitrate
-import ofdm
# /////////////////////////////////////////////////////////////////////////////
# receive path
@@ -43,40 +42,22 @@ class receive_path(gr.hier_block):
self._log = options.log
self._rx_callback = rx_callback # this callback is fired when there's a packet available
- if 0:
-
- chan_coeffs = gr.firdes.low_pass (1.0, # gain
- 2.0, # sampling rate
- bw, # midpoint of trans. band
- 1*bw, # width of trans. band
- gr.firdes.WIN_KAISER) # filter type
- else:
- chan_coeffs = [ 1.0, 0.0, 0 ]
- self.chan_filt = gr.fft_filter_ccc(1, chan_coeffs)
-
- self.ofdm_demod = ofdm.ofdm_demod(fg, options)
-
# receiver
- self.packet_receiver = \
- blks.demod_ofdm_pkts(fg,
- self.ofdm_demod,
- access_code=None,
- callback=self._rx_callback,
- threshold=-1)
+ self.ofdm_receiver = \
+ blks.demod_ofdm_pkts(fg, options,
+ callback=self._rx_callback)
# Carrier Sensing Blocks
- alpha = 0.001
- thresh = 30 # in dB, will have to adjust
- self.probe = gr.probe_avg_mag_sqrd_c(thresh,alpha)
- fg.connect(self.chan_filt, self.probe)
+ #alpha = 0.001
+ #thresh = 30 # in dB, will have to adjust
+ #self.probe = gr.probe_avg_mag_sqrd_c(thresh,alpha)
+ #fg.connect(self.chan_filt, self.probe)
# Display some information about the setup
if self._verbose:
self._print_verbage()
- fg.connect(self.chan_filt, self.packet_receiver)
- #fg.connect(self.chan_filt, gr.file_sink(gr.sizeof_gr_complex, "ofdmrx_chflt.dat"))
- gr.hier_block.__init__(self, fg, self.chan_filt, None)
+ gr.hier_block.__init__(self, fg, self.ofdm_receiver, None)
def carrier_sensed(self):
"""
diff --git a/gnuradio-examples/python/ofdm/transmit_path.py b/gnuradio-examples/python/ofdm/transmit_path.py
index 308ec0851..e684c442c 100644
--- a/gnuradio-examples/python/ofdm/transmit_path.py
+++ b/gnuradio-examples/python/ofdm/transmit_path.py
@@ -26,9 +26,6 @@ from gnuradio import eng_notation
import copy
import sys
-# from current dir
-import ofdm
-
# /////////////////////////////////////////////////////////////////////////////
# transmit path
# /////////////////////////////////////////////////////////////////////////////
@@ -44,13 +41,11 @@ class transmit_path(gr.hier_block):
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 = \
+ self.ofdm_transmitter = \
blks.mod_ofdm_pkts(fg,
- self.ofdm_mod,
- access_code=None,
+ options,
msgq_limit=4,
- pad_for_usrp=True)
+ pad_for_usrp=False)
self.amp = gr.multiply_const_cc(1)
self.set_tx_amplitude(self._tx_amplitude)
@@ -60,7 +55,7 @@ class transmit_path(gr.hier_block):
self._print_verbage()
# Create and setup transmit path flow graph
- fg.connect(self.packet_transmitter, self.amp)
+ fg.connect(self.ofdm_transmitter, self.amp)
gr.hier_block.__init__(self, fg, None, self.amp)
def set_tx_amplitude(self, ampl):
@@ -75,7 +70,7 @@ class transmit_path(gr.hier_block):
"""
Calls the transmitter method to send a packet
"""
- return self.packet_transmitter.send_pkt(payload, eof)
+ return self.ofdm_transmitter.send_pkt(payload, eof)
def bitrate(self):
return self._bitrate
@@ -87,7 +82,7 @@ class transmit_path(gr.hier_block):
"""
Adds transmitter-specific options to the Options Parser
"""
- normal.add_option("", "--tx-amplitude", type="eng_float", default=12000, metavar="AMPL",
+ normal.add_option("", "--tx-amplitude", type="eng_float", default=1, 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,
generated by cgit (git 2.34.1) at 2024-12-21 10:05:28 +0000