diff options
Diffstat (limited to 'gr-analog/python/analog/nbfm_rx.py')
| -rw-r--r-- | gr-analog/python/analog/nbfm_rx.py | 30 |
1 files changed, 17 insertions, 13 deletions
diff --git a/gr-analog/python/analog/nbfm_rx.py b/gr-analog/python/analog/nbfm_rx.py index 38fbf803c8..3e8dcd5287 100644 --- a/gr-analog/python/analog/nbfm_rx.py +++ b/gr-analog/python/analog/nbfm_rx.py @@ -19,15 +19,19 @@ # Boston, MA 02110-1301, USA. # +from __future__ import print_function +from __future__ import absolute_import +from __future__ import division +from __future__ import unicode_literals + import math + from gnuradio import gr from gnuradio import filter -from fm_emph import fm_deemph -try: - from gnuradio import analog -except ImportError: - import analog_swig as analog +from . import analog_swig as analog +from .fm_emph import fm_deemph + class nbfm_rx(gr.hier_block2): def __init__(self, audio_rate, quad_rate, tau=75e-6, max_dev=5e3): @@ -52,22 +56,22 @@ class nbfm_rx(gr.hier_block2): audio_filter """ - gr.hier_block2.__init__(self, "nbfm_rx", - gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature - gr.io_signature(1, 1, gr.sizeof_float)) # Output signature + gr.hier_block2.__init__(self, "nbfm_rx", + gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature + gr.io_signature(1, 1, gr.sizeof_float)) # Output signature # FIXME audio_rate and quad_rate ought to be exact rationals self._audio_rate = audio_rate = int(audio_rate) self._quad_rate = quad_rate = int(quad_rate) if quad_rate % audio_rate != 0: - raise ValueError, "quad_rate is not an integer multiple of audio_rate" + raise ValueError("quad_rate is not an integer multiple of audio_rate") - squelch_threshold = 20 # dB + squelch_threshold = 20 # dB #self.squelch = analog.simple_squelch_cc(squelch_threshold, 0.001) # FM Demodulator input: complex; output: float - k = quad_rate/(2*math.pi*max_dev) + k = quad_rate / (2*math.pi*max_dev) self.quad_demod = analog.quadrature_demod_cf(k) # FM Deemphasis IIR filter @@ -81,7 +85,7 @@ class nbfm_rx(gr.hier_block2): 0.5e3, # Transition band filter.firdes.WIN_HAMMING) # filter type - print "len(audio_taps) =", len(audio_taps) + print("len(audio_taps) =", len(audio_taps)) # Decimating audio filter # input: float; output: float; taps: float @@ -90,5 +94,5 @@ class nbfm_rx(gr.hier_block2): self.connect(self, self.quad_demod, self.deemph, self.audio_filter, self) def set_max_deviation(self, max_dev): - k = self._quad_rate/(2*math.pi*max_dev) + k = self._quad_rate / (2*math.pi*max_dev) self.quad_demod.set_gain(k) |