119 lines
4.6 KiB
Python
119 lines
4.6 KiB
Python
#!/usr/bin/env python2
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# -*- coding: utf-8 -*-
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# @file
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# @author (C) 2016 by Piotr Krysik <ptrkrysik@gmail.com>
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# @section LICENSE
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#
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# Gr-gsm is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 3, or (at your option)
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# any later version.
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#
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# Gr-gsm is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with gr-gsm; see the file COPYING. If not, write to
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# the Free Software Foundation, Inc., 51 Franklin Street,
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# Boston, MA 02110-1301, USA.
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#
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##################################################
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# GNU Radio Python Flow Graph
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# Title: Clock Offset Corrector Tagged
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# Author: Piotr Krysik
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# Description: Clock offset corrector with blocks that use tags to switch offsets
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# Generated: Wed Jul 20 20:07:11 2016
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##################################################
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from gnuradio import gr
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from gnuradio.filter import firdes
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import grgsm
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import math
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class clock_offset_corrector_tagged(gr.hier_block2):
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def __init__(self, fc=936.6e6, osr=4, ppm=0, samp_rate_in=1625000.0/6.0*4.0):
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gr.hier_block2.__init__(
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self, "Clock Offset Corrector Tagged",
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gr.io_signature(1, 1, gr.sizeof_gr_complex*1),
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gr.io_signature(1, 1, gr.sizeof_gr_complex*1),
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)
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self.message_port_register_hier_in("ctrl")
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##################################################
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# Parameters
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##################################################
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self.fc = fc
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self.osr = osr
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self.ppm = ppm
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self.samp_rate_in = samp_rate_in
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##################################################
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# Variables
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##################################################
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self.gsm_symb_rate = gsm_symb_rate = 1625000.0/6.0
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self.samp_rate_out = samp_rate_out = osr*gsm_symb_rate
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##################################################
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# Blocks
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##################################################
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self.gsm_msg_to_tag_0 = grgsm.msg_to_tag()
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self.gsm_controlled_rotator_cc_0 = grgsm.controlled_rotator_cc(ppm/1.0e6*2*math.pi*fc/samp_rate_out)
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self.gsm_controlled_fractional_resampler_cc_0 = grgsm.controlled_fractional_resampler_cc(0, (1-ppm/1.0e6)*(samp_rate_in/samp_rate_out))
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##################################################
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# Connections
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##################################################
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self.msg_connect((self, 'ctrl'), (self.gsm_msg_to_tag_0, 'msg'))
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self.connect((self.gsm_controlled_fractional_resampler_cc_0, 0), (self.gsm_controlled_rotator_cc_0, 0))
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self.connect((self.gsm_controlled_rotator_cc_0, 0), (self, 0))
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self.connect((self.gsm_msg_to_tag_0, 0), (self.gsm_controlled_fractional_resampler_cc_0, 0))
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self.connect((self, 0), (self.gsm_msg_to_tag_0, 0))
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def get_fc(self):
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return self.fc
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def set_fc(self, fc):
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self.fc = fc
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self.gsm_controlled_rotator_cc_0.set_phase_inc(self.ppm/1.0e6*2*math.pi*self.fc/self.samp_rate_out)
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def get_osr(self):
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return self.osr
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def set_osr(self, osr):
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self.osr = osr
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self.set_samp_rate_out(self.osr*self.gsm_symb_rate)
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def get_ppm(self):
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return self.ppm
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def set_ppm(self, ppm):
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self.ppm = ppm
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self.gsm_controlled_rotator_cc_0.set_phase_inc(self.ppm/1.0e6*2*math.pi*self.fc/self.samp_rate_out)
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self.gsm_controlled_fractional_resampler_cc_0.set_resamp_ratio((1-self.ppm/1.0e6)*(self.samp_rate_in/self.samp_rate_out))
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def get_samp_rate_in(self):
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return self.samp_rate_in
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def set_samp_rate_in(self, samp_rate_in):
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self.samp_rate_in = samp_rate_in
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self.gsm_controlled_fractional_resampler_cc_0.set_resamp_ratio((1-self.ppm/1.0e6)*(self.samp_rate_in/self.samp_rate_out))
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def get_gsm_symb_rate(self):
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return self.gsm_symb_rate
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def set_gsm_symb_rate(self, gsm_symb_rate):
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self.gsm_symb_rate = gsm_symb_rate
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self.set_samp_rate_out(self.osr*self.gsm_symb_rate)
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def get_samp_rate_out(self):
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return self.samp_rate_out
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def set_samp_rate_out(self, samp_rate_out):
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self.samp_rate_out = samp_rate_out
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self.gsm_controlled_rotator_cc_0.set_phase_inc(self.ppm/1.0e6*2*math.pi*self.fc/self.samp_rate_out)
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self.gsm_controlled_fractional_resampler_cc_0.set_resamp_ratio((1-self.ppm/1.0e6)*(self.samp_rate_in/self.samp_rate_out))
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