performance improvement courtesy of Scott

max-skip-test
Max 9 years ago
parent 2a724df16b
commit 50aa71e6b1
  1. 7
      op25/gr-op25_repeater/apps/scope.py

@ -314,7 +314,8 @@ class p25_rx_block (stdgui2.std_top_block):
self.lo = analog.sig_source_c (channel_rate, analog.GR_SIN_WAVE, self.lo_freq, 1.0, 0)
self.mixer = blocks.multiply_cc()
lpf_coeffs = filter.firdes.low_pass(1.0, self.channel_rate, 15000, 1500, filter.firdes.WIN_HANN)
self.lpf = filter.fir_filter_ccf(1, lpf_coeffs)
decimation = int(capture_rate / 96000)
self.lpf = filter.fir_filter_ccf(decimation, lpf_coeffs)
self.to_real = blocks.complex_to_real()
@ -322,8 +323,10 @@ class p25_rx_block (stdgui2.std_top_block):
frac_bw = 0.25
rs_taps = filter.firdes.low_pass(nphases, nphases, frac_bw, 0.5-frac_bw)
resampled_rate = float(capture_rate) / float(decimation) # rate at output of self.lpf
self.arb_resampler = filter.pfb.arb_resampler_ccf(
float(self.basic_rate)/float(capture_rate))
float(self.basic_rate) / resampled_rate)
fm_demod_gain = self.basic_rate / (2.0 * pi * self.symbol_deviation)
self.fm_demod = analog.quadrature_demod_cf(fm_demod_gain)

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