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op25-legacy
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add options for AGC, dibit output, 6k symbol rate 

git-svn-id: http://op25.osmocom.org/svn/trunk@318 65a5c917-d112-43f1-993d-58c26a4786be
master
max 2013-06-16 15:49:51 +00:00
parent 73e2f68fc6
commit f84a4ff655
1 changed files with 15 additions and 3 deletions
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18
python/cqpsk-demod-file.py
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@ -28,6 +28,7 @@ class my_top_block(gr.top_block):
parser = OptionParser(option_class=eng_option)
parser.add_option("-1", "--one-channel", action="store_true", default=False, help="software synthesized Q channel")
parser.add_option("-a", "--agc", action="store_true", default=False, help="automatic gain control (overrides --gain)")
parser.add_option("-c", "--calibration", type="eng_float", default=0, help="freq offset")
parser.add_option("-d", "--debug", action="store_true", default=False, help="allow time at init to attach gdb")
parser.add_option("-C", "--costas-alpha", type="eng_float", default=0.125, help="Costas alpha")
@ -37,13 +38,18 @@ class my_top_block(gr.top_block):
parser.add_option("-L", "--low-pass", type="eng_float", default=6.5e3, help="low pass cut-off", metavar="Hz")
parser.add_option("-o", "--output-file", type="string", default="out.dat", help="specify the output file")
parser.add_option("-p", "--polarity", action="store_true", default=False, help="use reversed polarity")
parser.add_option("-r", "--raw-symbols", type="string", default=None, help="dump decoded symbols to file")
parser.add_option("-s", "--sample-rate", type="int", default=96000, help="input sample rate")
parser.add_option("-t", "--tone-detect", action="store_true", default=False, help="use experimental tone detect algorithm")
parser.add_option("-v", "--verbose", action="store_true", default=False, help="additional output")
parser.add_option("-6", "--k6k", action="store_true", default=False, help="use 6K symbol rate")
(options, args) = parser.parse_args()
sample_rate = options.sample_rate
symbol_rate = 4800
if options.k6k:
symbol_rate = 6000
else:
symbol_rate = 4800
samples_per_symbol = sample_rate // symbol_rate
IN = gr.file_source(gr.sizeof_gr_complex, options.input_file)
@ -57,8 +63,10 @@ class my_top_block(gr.top_block):
MIXER = gr.multiply_cc()
# get signal into normalized range (-1.0 - +1.0)
# FIXME: add AGC
AMP = gr.multiply_const_cc(options.gain)
if options.agc:
AMP = gr.feedforward_agc_cc(16, 1.0)
else:
AMP = gr.multiply_const_cc(options.gain)
lpf_taps = gr.firdes.low_pass(1.0, sample_rate, options.low_pass, options.low_pass * 0.1, gr.firdes.WIN_HANN)
@ -130,6 +138,10 @@ class my_top_block(gr.top_block):
self.connect(LO, (MIXER, 1))
self.connect(MIXER, AMP, DECIM, DEMOD, DIFF, TOFLOAT, RESCALE, POLARITY, SLICER, DECODER, OUT)
if options.raw_symbols:
SINKC = gr.file_sink(gr.sizeof_char, options.raw_symbols)
self.connect(SLICER, SINKC)
if options.debug:
print 'Ready for GDB to attach (pid = %d)' % (os.getpid(),)
raw_input("Press 'Enter' to continue...")