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works with rtl sdr and gnuradio 3.8

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Bastian Bloessl 2013-11-17 20:00:18 +01:00 • committed by Jiří Pinkava
parent 1d569bbd62
commit 0aef6eb648
2 changed files with 17 additions and 72 deletions
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24
src/demod/python/cqpsk.py
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@ -94,7 +94,7 @@ class cqpsk_mod(gr.hier_block2):
raise TypeError, ("sbp must be an integer >= 2, is %d" % samples_per_symbol)
ntaps = 11 * samples_per_symbol
arity = 8
# turn bytes into k-bit vectors
@ -122,10 +122,10 @@ class cqpsk_mod(gr.hier_block2):
if verbose:
self._print_verbage()
if log:
self._setup_logging()
# Connect & Initialize base class
self.connect(self, self.bytes2chunks, self.symbol_mapper, self.diffenc,
self.chunks2symbols, self.rrc_filter, self)
@ -150,7 +150,7 @@ class cqpsk_mod(gr.hier_block2):
self.connect(self.symbol_mapper,
blocks.file_sink(gr.sizeof_char, "tx_graycoder.dat"))
self.connect(self.diffenc,
blocks.file_sink(gr.sizeof_char, "tx_diffenc.dat"))
blocks.file_sink(gr.sizeof_char, "tx_diffenc.dat"))
self.connect(self.chunks2symbols,
blocks.file_sink(gr.sizeof_gr_complex, "tx_chunks2symbols.dat"))
self.connect(self.rrc_filter,
@ -184,7 +184,7 @@ class cqpsk_mod(gr.hier_block2):
class cqpsk_demod(gr.hier_block2):
def __init__(self,
def __init__(self,
samples_per_symbol=_def_samples_per_symbol,
excess_bw=_def_excess_bw,
costas_alpha=_def_costas_alpha,
@ -236,13 +236,13 @@ class cqpsk_demod(gr.hier_block2):
raise TypeError, "sbp must be >= 2, is %d" % samples_per_symbol
arity = pow(2,self.bits_per_symbol())
# Automatic gain control
scale = (1.0/16384.0)
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 = analog.feedforward_agc_cc(16, 2.0)
# RRC data filter
ntaps = 11 * samples_per_symbol
self.rrc_taps = firdes.root_raised_cosine(
@ -251,7 +251,7 @@ class cqpsk_demod(gr.hier_block2):
1.0, # symbol rate
self._excess_bw, # excess bandwidth (roll-off factor)
ntaps)
self.rrc_filter=filter.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}
@ -262,7 +262,7 @@ class cqpsk_demod(gr.hier_block2):
self._costas_beta = 0.25 * self._costas_alpha * self._costas_alpha
fmin = -0.025
fmax = 0.025
if not _def_has_gr_digital:
self.receiver=gr.mpsk_receiver_cc(arity, pi/4.0,
self._costas_alpha, self._costas_beta,
@ -292,10 +292,10 @@ class cqpsk_demod(gr.hier_block2):
if verbose:
self._print_verbage()
if log:
self._setup_logging()
# Connect & Initialize base class
self.connect(self, self.pre_scaler, self.agc, self.rrc_filter, self.receiver,
self.diffdec, self.to_float, self.rescale, self)
@ -331,7 +331,7 @@ class cqpsk_demod(gr.hier_block2):
self.connect(self.receiver,
blocks.file_sink(gr.sizeof_gr_complex, "rx_receiver.dat"))
self.connect(self.diffdec,
blocks.file_sink(gr.sizeof_gr_complex, "rx_diffdec.dat"))
blocks.file_sink(gr.sizeof_gr_complex, "rx_diffdec.dat"))
self.connect(self.to_float,
blocks.file_sink(gr.sizeof_float, "rx_to_float.dat"))
self.connect(self.rescale,