diff options
author | Piotr Krysik <ptrkrysik@gmail.com> | 2017-06-11 17:39:05 +0200 |
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committer | Piotr Krysik <ptrkrysik@gmail.com> | 2017-06-11 17:39:05 +0200 |
commit | d455c1438a661ccf6887742f3f372d96c6658f82 (patch) | |
tree | 1614f25caea433c9507cbc19b23d118e16b16be5 /python/receiver | |
parent | 3caf1a76f0a7540e1292623cea4a7b3e51735794 (diff) |
Removed wideband_input_adaptor
Diffstat (limited to 'python/receiver')
-rw-r--r-- | python/receiver/gsm_wideband_input.py | 122 |
1 files changed, 0 insertions, 122 deletions
diff --git a/python/receiver/gsm_wideband_input.py b/python/receiver/gsm_wideband_input.py deleted file mode 100644 index 962d7b0..0000000 --- a/python/receiver/gsm_wideband_input.py +++ /dev/null @@ -1,122 +0,0 @@ -#!/usr/bin/env python -################################################## -# Gnuradio Python Flow Graph -# Title: GSM wideband input adaptor -# Author: Piotr Krysik -# Co-author: Pieter Robyns -# Description: Adaptor of input stream for the GSM receiver. Contains frequency ofset corrector doing also resampling to integer multiplies of GSM sample rate and LP filter filtering GSM channel. -################################################## - -from gnuradio import filter -from gnuradio import gr -from gnuradio import eng_notation -from gnuradio.filter import firdes -import grgsm.arfcn as arfcn -import grgsm - -class gsm_wideband_input(grgsm.hier_block): - def __init__(self, ppm=0, osr=4, fc=925.2e6, samp_rate_in=20e6, ca=[], band='P-GSM'): - self.num_streams = len(ca) - grgsm.hier_block.__init__( - self, "GSM wideband input adaptor", - gr.io_signature(1, 1, gr.sizeof_gr_complex*1), - gr.io_signature(self.num_streams, self.num_streams, gr.sizeof_gr_complex*1), - ) - - ################################################## - # Parameters - ################################################## - self.ppm = ppm - self.osr = osr - self.fc = fc - self.samp_rate_in = samp_rate_in - self.ca = ca - self.blocks_fir_filters = {} - self.blocks_resamplers = {} - self.blocks_ocs = {} - self.band = band - - ################################################## - # Variables - ################################################## - self.samp_rate_out = samp_rate_out = 1625000.0/6.0*osr - - ################################################## - # Blocks - ################################################## - self.ppm_in = None - self.message_port_register_hier_in("ppm_in") - #self.lpf = firdes.low_pass(1, samp_rate_out, 125e3, 5e3, firdes.WIN_HAMMING, 6.76) - self.lpf = firdes.low_pass(1, samp_rate_in, 125e3, 75e3, firdes.WIN_HAMMING, 6.76) - self.gsm_clock_offset_corrector_0 = grgsm.clock_offset_corrector( - fc=fc, - ppm=ppm, - samp_rate_in=samp_rate_in, - ) - - center_arfcn = arfcn.downlink2arfcn(fc, band) - fc_str = eng_notation.num_to_str(fc) - print("Extracting channels %s, given center frequency at %sHz (ARFCN %d)" % (str(ca), fc_str, center_arfcn)) - - self.connect((self, 0), (self.gsm_clock_offset_corrector_0, 0)) - - output_port = 0 - for channel in ca: - channel_freq = arfcn.arfcn2downlink(channel, band) - if channel_freq is None: - print("Warning: invalid ARFCN %d for band %s" % (channel, band)) - continue - freq_diff = channel_freq - fc - freq_diff_str = "+" if 0 <= freq_diff else "" - freq_diff_str += eng_notation.num_to_str(freq_diff) - print("ARFCN %d is at %sHz %sHz" % (channel, fc_str, freq_diff_str)) - - self.blocks_resamplers[channel] = filter.fractional_resampler_cc(0, samp_rate_in/samp_rate_out) - self.blocks_fir_filters[channel] = filter.freq_xlating_fir_filter_ccc(1, self.lpf, freq_diff, samp_rate_in) - self.connect((self.gsm_clock_offset_corrector_0, 0), (self.blocks_fir_filters[channel], 0)) - self.connect((self.blocks_fir_filters[channel], 0), (self.blocks_resamplers[channel], 0)) - self.connect((self.blocks_resamplers[channel], 0), (self, output_port)) - output_port += 1 - - ################################################## - # Asynch Message Connections - ################################################## - self.msg_connect(self, "ppm_in", self.gsm_clock_offset_corrector_0, "ppm_in") - - def get_ppm(self): - return self.ppm - - def set_ppm(self, ppm): - self.ppm = ppm - self.gsm_clock_offset_corrector_0.set_ppm(self.ppm) - - def get_fc(self): - return self.fc - - def set_fc(self, fc): - self.fc = fc - self.gsm_clock_offset_corrector_0.set_fc(self.fc) - - def get_osr(self): - return self.osr - - def set_osr(self, osr): - self.osr = osr - self.set_samp_rate_out(1625000.0/6.0*self.osr) - - def get_samp_rate_in(self): - return self.samp_rate_in - - def set_samp_rate_in(self, samp_rate_in): - self.samp_rate_in = samp_rate_in - for channel in self.blocks_resamplers: - self.blocks_resamplers[channel].set_resamp_ratio(self.samp_rate_in / self.samp_rate_out) - self.gsm_clock_offset_corrector_0.set_samp_rate_in(self.samp_rate_in) - - def get_samp_rate_out(self): - return self.samp_rate_out - - def set_samp_rate_out(self, samp_rate_out): - self.samp_rate_out = samp_rate_out - for channel in self.blocks_resamplers: - self.blocks_resamplers[channel].set_resamp_ratio(self.samp_rate_in / self.samp_rate_out) |