diff options
Diffstat (limited to 'gr-analog/python/analog/wfm_rcv_pll.py')
| -rw-r--r-- | gr-analog/python/analog/wfm_rcv_pll.py | 47 |
1 files changed, 25 insertions, 22 deletions
diff --git a/gr-analog/python/analog/wfm_rcv_pll.py b/gr-analog/python/analog/wfm_rcv_pll.py index 282e2b14be..b6ca7fe7c2 100644 --- a/gr-analog/python/analog/wfm_rcv_pll.py +++ b/gr-analog/python/analog/wfm_rcv_pll.py @@ -19,16 +19,19 @@ # Boston, MA 02110-1301, USA. # +from __future__ import absolute_import +from __future__ import division +from __future__ import unicode_literals + +import math + from gnuradio import gr from gnuradio import blocks from gnuradio import filter -from fm_emph import fm_deemph -import math -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 wfm_rcv_pll(gr.hier_block2): def __init__(self, demod_rate, audio_decimation): @@ -42,9 +45,9 @@ class wfm_rcv_pll(gr.hier_block2): demod_rate: input sample rate of complex baseband input. (float) audio_decimation: how much to decimate demod_rate to get to audio. (integer) """ - gr.hier_block2.__init__(self, "wfm_rcv_pll", - gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature - gr.io_signature(2, 2, gr.sizeof_float)) # Output signature + gr.hier_block2.__init__(self, "wfm_rcv_pll", + gr.io_signature(1, 1, gr.sizeof_gr_complex), # Input signature + gr.io_signature(2, 2, gr.sizeof_float)) # Output signature bandwidth = 250e3 audio_rate = demod_rate / audio_decimation @@ -92,8 +95,8 @@ class wfm_rcv_pll(gr.hier_block2): stereo_dsbsc_filter_coeffs = \ filter.firdes.complex_band_pass(20.0, demod_rate, - 38000-15000/2, - 38000+15000/2, + 38000-15000 / 2, + 38000+15000 / 2, width_of_transition_band, filter.firdes.WIN_HAMMING) #print "len stereo dsbsc filter = ",len(stereo_dsbsc_filter_coeffs) @@ -120,12 +123,12 @@ class wfm_rcv_pll(gr.hier_block2): #print "stereo dsbsc filter ", stereo_dsbsc_filter_coeffs # construct overlap add filter system from coefficients for stereo carrier - self.rds_signal_filter = \ + self.rds_signal_filter = \ filter.fir_filter_fcc(audio_decimation, stereo_rds_filter_coeffs) - self.rds_carrier_generator = blocks.multiply_cc(); - self.rds_signal_generator = blocks.multiply_cc(); - self_rds_signal_processor = blocks.null_sink(gr.sizeof_gr_complex); + self.rds_carrier_generator = blocks.multiply_cc(); + self.rds_signal_generator = blocks.multiply_cc(); + self_rds_signal_processor = blocks.null_sink(gr.sizeof_gr_complex); loop_bw = 2*math.pi/100.0 max_freq = -2.0*math.pi*18990/audio_rate; @@ -169,15 +172,15 @@ class wfm_rcv_pll(gr.hier_block2): #take the same real part of the DSBSC baseband signal and send it to negative side of a subtracter self.connect(self.LmR_real,(self.Make_Right,1)) - # Make rds carrier by taking the squared pilot tone and multiplying by pilot tone - self.connect(self.stereo_basebander,(self.rds_carrier_generator,0)) + # Make rds carrier by taking the squared pilot tone and multiplying by pilot tone + self.connect(self.stereo_basebander,(self.rds_carrier_generator,0)) self.connect(self.stereo_carrier_pll_recovery,(self.rds_carrier_generator,1)) - # take signal, filter off rds, send into mixer 0 channel - self.connect(self.fm_demod,self.rds_signal_filter,(self.rds_signal_generator,0)) + # take signal, filter off rds, send into mixer 0 channel + self.connect(self.fm_demod,self.rds_signal_filter,(self.rds_signal_generator,0)) # take rds_carrier_generator output and send into mixer 1 channel - self.connect(self.rds_carrier_generator,(self.rds_signal_generator,1)) - # send basebanded rds signal and send into "processor" which for now is a null sink - self.connect(self.rds_signal_generator,self_rds_signal_processor) + self.connect(self.rds_carrier_generator,(self.rds_signal_generator,1)) + # send basebanded rds signal and send into "processor" which for now is a null sink + self.connect(self.rds_signal_generator,self_rds_signal_processor) if 1: |