diff options
| author | Ben Reynwar <ben@reynwar.net> | 2013-03-07 23:27:44 -0700 |
|---|---|---|
| committer | Ben Reynwar <ben@reynwar.net> | 2013-03-07 23:27:44 -0700 |
| commit | ae30f247616b6229fb304e30fecf3f82ae09dbf6 (patch) | |
| tree | 74c1d6cd8300b44b6280c56bc4ad257c40390b3e /gr-analog/python/nbfm_tx.py | |
| parent | e8b4e619479dd23d87c3aef042f2452f867a1e18 (diff) | |
analog: Enabling uninstalled python imports.
Diffstat (limited to 'gr-analog/python/nbfm_tx.py')
| -rw-r--r-- | gr-analog/python/nbfm_tx.py | 93 |
1 files changed, 0 insertions, 93 deletions
diff --git a/gr-analog/python/nbfm_tx.py b/gr-analog/python/nbfm_tx.py deleted file mode 100644 index 62b56bae52..0000000000 --- a/gr-analog/python/nbfm_tx.py +++ /dev/null @@ -1,93 +0,0 @@ -# -# Copyright 2005,2012 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. -# - -import math -from gnuradio import gr, filter -from fm_emph import fm_preemph - -try: - from gnuradio import analog -except ImportError: - import analog_swig as analog - -class nbfm_tx(gr.hier_block2): - def __init__(self, audio_rate, quad_rate, tau=75e-6, max_dev=5e3): - """ - Narrow Band FM Transmitter. - - Takes a single float input stream of audio samples in the range [-1,+1] - and produces a single FM modulated complex baseband output. - - Args: - audio_rate: sample rate of audio stream, >= 16k (integer) - quad_rate: sample rate of output stream (integer) - tau: preemphasis time constant (default 75e-6) (float) - max_dev: maximum deviation in Hz (default 5e3) (float) - - quad_rate must be an integer multiple of audio_rate. - """ - - gr.hier_block2.__init__(self, "nbfm_tx", - gr.io_signature(1, 1, gr.sizeof_float), # Input signature - gr.io_signature(1, 1, gr.sizeof_gr_complex)) # Output signature - - # FIXME audio_rate and quad_rate ought to be exact rationals - audio_rate = int(audio_rate) - quad_rate = int(quad_rate) - - if quad_rate % audio_rate != 0: - raise ValueError, "quad_rate is not an integer multiple of audio_rate" - - - do_interp = audio_rate != quad_rate - - if do_interp: - interp_factor = quad_rate / audio_rate - interp_taps = filter.optfir.low_pass(interp_factor, # gain - quad_rate, # Fs - 4500, # passband cutoff - 7000, # stopband cutoff - 0.1, # passband ripple dB - 40) # stopband atten dB - - #print "len(interp_taps) =", len(interp_taps) - self.interpolator = filter.interp_fir_filter_fff (interp_factor, interp_taps) - - self.preemph = fm_preemph(quad_rate, tau=tau) - - k = 2 * math.pi * max_dev / quad_rate - self.modulator = analog.frequency_modulator_fc(k) - - if do_interp: - self.connect(self, self.interpolator, self.preemph, self.modulator, self) - else: - self.connect(self, self.preemph, self.modulator, self) - - -class ctcss_gen_f(gr.hier_block2): - def __init__(self, sample_rate, tone_freq): - gr.hier_block2.__init__(self, "ctcss_gen_f", - gr.io_signature(0, 0, 0), # Input signature - gr.io_signature(1, 1, gr.sizeof_float)) # Output signature - - self.plgen = analog.sig_source_f(sample_rate, analog.GR_SIN_WAVE, - tone_freq, 0.1, 0.0) - self.connect(self.plgen, self) |