diff options
Diffstat (limited to 'gnuradio-core/src/examples/pfb/fmtest.py')
| -rwxr-xr-x | gnuradio-core/src/examples/pfb/fmtest.py | 36 |
1 files changed, 18 insertions, 18 deletions
diff --git a/gnuradio-core/src/examples/pfb/fmtest.py b/gnuradio-core/src/examples/pfb/fmtest.py index 635ee4e9e..b9dd9b382 100755 --- a/gnuradio-core/src/examples/pfb/fmtest.py +++ b/gnuradio-core/src/examples/pfb/fmtest.py @@ -1,24 +1,24 @@ #!/usr/bin/env python # # Copyright 2009 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 3, 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, blks2 import sys, math, time @@ -45,7 +45,7 @@ class fmtx(gr.hier_block2): gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature fmtx = blks2.nbfm_tx (audio_rate, if_rate, max_dev=5e3, tau=75e-6) - + # Local oscillator lo = gr.sig_source_c (if_rate, # sample rate gr.GR_SIN_WAVE, # waveform type @@ -53,7 +53,7 @@ class fmtx(gr.hier_block2): 1.0, # amplitude 0) # DC Offset mixer = gr.multiply_cc () - + self.connect (self, fmtx, (mixer, 0)) self.connect (lo, (mixer, 1)) self.connect (mixer, self) @@ -93,7 +93,7 @@ class fmtest(gr.top_block): bw = chspacing/2.0 t_bw = chspacing/10.0 self._chan_rate = self._if_rate / self._M - self._taps = gr.firdes.low_pass_2(1, self._if_rate, bw, t_bw, + self._taps = gr.firdes.low_pass_2(1, self._if_rate, bw, t_bw, attenuation_dB=100, window=gr.firdes.WIN_BLACKMAN_hARRIS) tpc = math.ceil(float(len(self._taps)) / float(self._M)) @@ -101,11 +101,11 @@ class fmtest(gr.top_block): print "Number of taps: ", len(self._taps) print "Number of channels: ", self._M print "Taps per channel: ", tpc - + self.pfb = blks2.pfb_channelizer_ccf(self._M, self._taps) - + self.connect(self.channel, self.pfb) - + # Create a file sink for each of M output channels of the filter and connect it self.fmdet = list() self.squelch = list() @@ -153,8 +153,8 @@ def main(): X_in = 10.0*scipy.log10(abs(fftpack.fftshift(X))) f_in = scipy.arange(-fs/2.0, fs/2.0, fs/float(X_in.size)) p1_f = sp1_f.plot(f_in, X_in, "b") - sp1_f.set_xlim([min(f_in), max(f_in)+1]) - sp1_f.set_ylim([-120.0, 20.0]) + sp1_f.set_xlim([min(f_in), max(f_in)+1]) + sp1_f.set_ylim([-120.0, 20.0]) sp1_f.set_title("Input Signal", weight="bold") sp1_f.set_xlabel("Frequency (Hz)") @@ -162,7 +162,7 @@ def main(): Ts = 1.0/fs Tmax = len(d)*Ts - + t_in = scipy.arange(0, Tmax, Ts) x_in = scipy.array(d) sp1_t = fig1.add_subplot(2, 1, 2) @@ -194,8 +194,8 @@ def main(): #f_o = scipy.arange(-fs_o/2.0, fs_o/2.0, fs_o/float(X_o.size)) f_o = scipy.arange(0, fs_o/2.0, fs_o/2.0/float(X_o.size)) p2_f = sp2_f.plot(f_o, X_o, "b") - sp2_f.set_xlim([min(f_o), max(f_o)+0.1]) - sp2_f.set_ylim([-120.0, 20.0]) + sp2_f.set_xlim([min(f_o), max(f_o)+0.1]) + sp2_f.set_ylim([-120.0, 20.0]) sp2_f.grid(True) sp2_f.set_title(("Channel %d" % i), weight="bold") @@ -211,8 +211,8 @@ def main(): sp2_t = fig3.add_subplot(Nrows, Ncols, 1+i) p2_t = sp2_t.plot(t_o, x_t.real, "b") p2_t = sp2_t.plot(t_o, x_t.imag, "r") - sp2_t.set_xlim([min(t_o), max(t_o)+1]) - sp2_t.set_ylim([-1, 1]) + sp2_t.set_xlim([min(t_o), max(t_o)+1]) + sp2_t.set_ylim([-1, 1]) sp2_t.set_xlabel("Time (s)") sp2_t.set_ylabel("Amplitude") |