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updated uhd-tetra_demod.py and cqpsk.py for GNU Radio v3.74 compatibility

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This commit is contained in:
Mike Jameson 2014-08-25 14:33:49 +01:00
parent 6430bdeb5f
commit 5429a1e3ab
2 changed files with 29 additions and 27 deletions
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45
src/demod/python/cqpsk.py
View file

@ -27,7 +27,8 @@
differential PI/4 CQPSK modulation and demodulation.
"""
from gnuradio import gr, gru
from gnuradio import gr, gru, blocks, analog, filter, digital
from gnuradio.filter import firdes
from math import pi, sqrt
#import psk
import cmath
@ -110,14 +111,14 @@ class cqpsk_mod(gr.hier_block2):
self.chunks2symbols = gr.chunks_to_symbols_bc(psk.constellation[arity])
# pulse shaping filter
self.rrc_taps = gr.firdes.root_raised_cosine(
self.rrc_taps = firdes.root_raised_cosine(
self._samples_per_symbol, # gain (sps since we're interpolating by sps)
self._samples_per_symbol, # sampling rate
1.0, # symbol rate
self._excess_bw, # excess bandwidth (roll-off factor)
ntaps)
self.rrc_filter = gr.interp_fir_filter_ccf(self._samples_per_symbol, self.rrc_taps)
self.rrc_filter = filter.interp_fir_filter_ccf(self._samples_per_symbol, self.rrc_taps)
if verbose:
self._print_verbage()
@ -145,15 +146,15 @@ class cqpsk_mod(gr.hier_block2):
def _setup_logging(self):
print "Modulation logging turned on."
self.connect(self.bytes2chunks,
gr.file_sink(gr.sizeof_char, "tx_bytes2chunks.dat"))
blocks.file_sink(gr.sizeof_char, "tx_bytes2chunks.dat"))
self.connect(self.symbol_mapper,
gr.file_sink(gr.sizeof_char, "tx_graycoder.dat"))
blocks.file_sink(gr.sizeof_char, "tx_graycoder.dat"))
self.connect(self.diffenc,
gr.file_sink(gr.sizeof_char, "tx_diffenc.dat"))
blocks.file_sink(gr.sizeof_char, "tx_diffenc.dat"))
self.connect(self.chunks2symbols,
gr.file_sink(gr.sizeof_gr_complex, "tx_chunks2symbols.dat"))
blocks.file_sink(gr.sizeof_gr_complex, "tx_chunks2symbols.dat"))
self.connect(self.rrc_filter,
gr.file_sink(gr.sizeof_gr_complex, "tx_rrc_filter.dat"))
blocks.file_sink(gr.sizeof_gr_complex, "tx_rrc_filter.dat"))
def add_options(parser):
"""
@ -238,19 +239,19 @@ class cqpsk_demod(gr.hier_block2):
# Automatic gain control
scale = (1.0/16384.0)
self.pre_scaler = gr.multiply_const_cc(scale) # scale the signal from full-range to +-1
self.pre_scaler = blocks.multiply_const_cc(scale) # scale the signal from full-range to +-1
#self.agc = gr.agc2_cc(0.6e-1, 1e-3, 1, 1, 100)
self.agc = gr.feedforward_agc_cc(16, 2.0)
self.agc = analog.feedforward_agc_cc(16, 2.0)
# RRC data filter
ntaps = 11 * samples_per_symbol
self.rrc_taps = gr.firdes.root_raised_cosine(
self.rrc_taps = firdes.root_raised_cosine(
1.0, # gain
self._samples_per_symbol, # sampling rate
1.0, # symbol rate
self._excess_bw, # excess bandwidth (roll-off factor)
ntaps)
self.rrc_filter=gr.interp_fir_filter_ccf(1, self.rrc_taps)
self.rrc_filter=filter.interp_fir_filter_ccf(1, self.rrc_taps)
if not self._mm_gain_mu:
sbs_to_mm = {2: 0.050, 3: 0.075, 4: 0.11, 5: 0.125, 6: 0.15, 7: 0.15}
@ -281,13 +282,13 @@ class cqpsk_demod(gr.hier_block2):
self.receiver.set_beta(self._costas_beta)
# Perform Differential decoding on the constellation
self.diffdec = gr.diff_phasor_cc()
self.diffdec = digital.diff_phasor_cc()
# take angle of the difference (in radians)
self.to_float = gr.complex_to_arg()
self.to_float = blocks.complex_to_arg()
# convert from radians such that signal is in -3/-1/+1/+3
self.rescale = gr.multiply_const_ff( 1 / (pi / 4) )
self.rescale = blocks.multiply_const_ff( 1 / (pi / 4) )
if verbose:
self._print_verbage()
@ -322,19 +323,19 @@ class cqpsk_demod(gr.hier_block2):
def _setup_logging(self):
print "Modulation logging turned on."
self.connect(self.pre_scaler,
gr.file_sink(gr.sizeof_gr_complex, "rx_prescaler.dat"))
blocks.file_sink(gr.sizeof_gr_complex, "rx_prescaler.dat"))
self.connect(self.agc,
gr.file_sink(gr.sizeof_gr_complex, "rx_agc.dat"))
blocks.file_sink(gr.sizeof_gr_complex, "rx_agc.dat"))
self.connect(self.rrc_filter,
gr.file_sink(gr.sizeof_gr_complex, "rx_rrc_filter.dat"))
blocks.file_sink(gr.sizeof_gr_complex, "rx_rrc_filter.dat"))
self.connect(self.receiver,
gr.file_sink(gr.sizeof_gr_complex, "rx_receiver.dat"))
blocks.file_sink(gr.sizeof_gr_complex, "rx_receiver.dat"))
self.connect(self.diffdec,
gr.file_sink(gr.sizeof_gr_complex, "rx_diffdec.dat"))
blocks.file_sink(gr.sizeof_gr_complex, "rx_diffdec.dat"))
self.connect(self.to_float,
gr.file_sink(gr.sizeof_float, "rx_to_float.dat"))
blocks.file_sink(gr.sizeof_float, "rx_to_float.dat"))
self.connect(self.rescale,
gr.file_sink(gr.sizeof_float, "rx_rescale.dat"))
blocks.file_sink(gr.sizeof_float, "rx_rescale.dat"))
def add_options(parser):
"""

11
src/demod/python/uhd-tetra_demod.py
View file

@ -2,8 +2,9 @@
import sys
import math
from gnuradio import gr, gru, audio, eng_notation, blks2, optfir
from gnuradio import gr, gru, audio, eng_notation, filter, blocks
from gnuradio import uhd
from gnuradio.filter import firdes
from gnuradio.eng_option import eng_option
from optparse import OptionParser
@ -63,9 +64,9 @@ class my_top_block(gr.top_block):
sys.stderr.write('Failed to set center frequency\n')
raise SystemExit, 1
channel_taps = gr.firdes.low_pass(1.0, sample_rate, options.low_pass, options.low_pass * 0.1, gr.firdes.WIN_HANN)
channel_taps = firdes.low_pass(1.0, sample_rate, options.low_pass, options.low_pass * 0.1, firdes.WIN_HANN)
FILTER = gr.freq_xlating_fir_filter_ccf(1, channel_taps, options.calibration, sample_rate)
FILTER = filter.freq_xlating_fir_filter_ccf(1, channel_taps, options.calibration, sample_rate)
sys.stderr.write("sample rate: %d\n" %(sample_rate))
@ -78,11 +79,11 @@ class my_top_block(gr.top_block):
log=options.log,
verbose=options.verbose)
OUT = gr.file_sink(gr.sizeof_float, options.output_file)
OUT = blocks.file_sink(gr.sizeof_float, options.output_file)
r = float(sample_rate) / float(new_sample_rate)
INTERPOLATOR = gr.fractional_interpolator_cc(0, r)
INTERPOLATOR = filter.fractional_interpolator_cc(0, r)
self.connect(self._u, FILTER, INTERPOLATOR, DEMOD, OUT)