ptrkrysik | dac3b2a | 2014-11-06 14:47:33 +0100 | [diff] [blame] | 1 | #!/usr/bin/env python |
| 2 | ################################################## |
| 3 | # Gnuradio Python Flow Graph |
| 4 | # Title: GSM input adaptor |
| 5 | # Author: Piotr Krysik |
| 6 | # 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. |
ptrkrysik | 381253a | 2014-11-19 11:30:53 +0100 | [diff] [blame] | 7 | # Generated: Wed Nov 19 08:23:52 2014 |
ptrkrysik | dac3b2a | 2014-11-06 14:47:33 +0100 | [diff] [blame] | 8 | ################################################## |
| 9 | |
| 10 | from gnuradio import filter |
| 11 | from gnuradio import gr |
| 12 | from gnuradio.filter import firdes |
Piotr Krysik | e3b652d | 2016-01-02 09:14:27 +0100 | [diff] [blame] | 13 | from distutils.version import LooseVersion as version |
ptrkrysik | 3be74a7 | 2014-12-13 10:11:00 +0100 | [diff] [blame] | 14 | import grgsm |
ptrkrysik | dac3b2a | 2014-11-06 14:47:33 +0100 | [diff] [blame] | 15 | |
Piotr Krysik | 8715da0 | 2016-01-06 22:21:09 +0100 | [diff] [blame] | 16 | class gsm_input(grgsm.hier_block): |
ptrkrysik | dac3b2a | 2014-11-06 14:47:33 +0100 | [diff] [blame] | 17 | |
| 18 | def __init__(self, ppm=0, osr=4, fc=940e6, samp_rate_in=1e6): |
Piotr Krysik | 8715da0 | 2016-01-06 22:21:09 +0100 | [diff] [blame] | 19 | grgsm.hier_block.__init__( |
ptrkrysik | dac3b2a | 2014-11-06 14:47:33 +0100 | [diff] [blame] | 20 | self, "GSM input adaptor", |
| 21 | gr.io_signature(1, 1, gr.sizeof_gr_complex*1), |
| 22 | gr.io_signature(1, 1, gr.sizeof_gr_complex*1), |
| 23 | ) |
| 24 | |
| 25 | ################################################## |
| 26 | # Parameters |
| 27 | ################################################## |
| 28 | self.ppm = ppm |
| 29 | self.osr = osr |
| 30 | self.fc = fc |
| 31 | self.samp_rate_in = samp_rate_in |
| 32 | |
| 33 | ################################################## |
ptrkrysik | 381253a | 2014-11-19 11:30:53 +0100 | [diff] [blame] | 34 | # Variables |
| 35 | ################################################## |
| 36 | self.samp_rate_out = samp_rate_out = 1625000.0/6.0*osr |
| 37 | |
| 38 | ################################################## |
ptrkrysik | dac3b2a | 2014-11-06 14:47:33 +0100 | [diff] [blame] | 39 | # Blocks |
| 40 | ################################################## |
Piotr Krysik | cbaf476 | 2016-07-15 13:14:37 +0200 | [diff] [blame] | 41 | self.message_port_register_hier_in("ctrl_in") |
Piotr Krysik | 3a527f8 | 2016-01-01 16:01:26 +0100 | [diff] [blame] | 42 | |
ptrkrysik | dac3b2a | 2014-11-06 14:47:33 +0100 | [diff] [blame] | 43 | self.low_pass_filter_0_0 = filter.fir_filter_ccf(1, firdes.low_pass( |
ptrkrysik | 381253a | 2014-11-19 11:30:53 +0100 | [diff] [blame] | 44 | 1, samp_rate_out, 125e3, 5e3, firdes.WIN_HAMMING, 6.76)) |
Piotr Krysik | cbaf476 | 2016-07-15 13:14:37 +0200 | [diff] [blame] | 45 | self.gsm_clock_offset_corrector_tagged_0 = grgsm.clock_offset_corrector_tagged( |
Piotr Krysik | 18f7690 | 2015-05-29 07:04:08 +0200 | [diff] [blame] | 46 | fc=fc, |
| 47 | ppm=ppm, |
ptrkrysik | dac3b2a | 2014-11-06 14:47:33 +0100 | [diff] [blame] | 48 | samp_rate_in=samp_rate_in, |
ptrkrysik | dac3b2a | 2014-11-06 14:47:33 +0100 | [diff] [blame] | 49 | ) |
ptrkrysik | 381253a | 2014-11-19 11:30:53 +0100 | [diff] [blame] | 50 | self.fractional_resampler_xx_0 = filter.fractional_resampler_cc(0, samp_rate_in/samp_rate_out) |
ptrkrysik | dac3b2a | 2014-11-06 14:47:33 +0100 | [diff] [blame] | 51 | |
| 52 | ################################################## |
| 53 | # Connections |
| 54 | ################################################## |
| 55 | self.connect((self.low_pass_filter_0_0, 0), (self, 0)) |
ptrkrysik | 381253a | 2014-11-19 11:30:53 +0100 | [diff] [blame] | 56 | self.connect((self.fractional_resampler_xx_0, 0), (self.low_pass_filter_0_0, 0)) |
Piotr Krysik | cbaf476 | 2016-07-15 13:14:37 +0200 | [diff] [blame] | 57 | self.connect((self.gsm_clock_offset_corrector_tagged_0, 0), (self.fractional_resampler_xx_0, 0)) |
| 58 | self.connect((self, 0), (self.gsm_clock_offset_corrector_tagged_0, 0)) |
ptrkrysik | dac3b2a | 2014-11-06 14:47:33 +0100 | [diff] [blame] | 59 | |
| 60 | ################################################## |
| 61 | # Asynch Message Connections |
| 62 | ################################################## |
Piotr Krysik | cbaf476 | 2016-07-15 13:14:37 +0200 | [diff] [blame] | 63 | self.msg_connect((self, 'ctrl_in'), (self.gsm_clock_offset_corrector_tagged_0, 'ctrl')) |
ptrkrysik | dac3b2a | 2014-11-06 14:47:33 +0100 | [diff] [blame] | 64 | |
Piotr Krysik | cbaf476 | 2016-07-15 13:14:37 +0200 | [diff] [blame] | 65 | def set_fc(self, fc): |
| 66 | self.fc = fc |
| 67 | self.gsm_clock_offset_corrector_tagged_0.set_fc(self.fc) |
ptrkrysik | dac3b2a | 2014-11-06 14:47:33 +0100 | [diff] [blame] | 68 | |
| 69 | def get_osr(self): |
| 70 | return self.osr |
| 71 | |
| 72 | def set_osr(self, osr): |
| 73 | self.osr = osr |
ptrkrysik | 381253a | 2014-11-19 11:30:53 +0100 | [diff] [blame] | 74 | self.set_samp_rate_out(1625000.0/6.0*self.osr) |
ptrkrysik | dac3b2a | 2014-11-06 14:47:33 +0100 | [diff] [blame] | 75 | |
Piotr Krysik | cbaf476 | 2016-07-15 13:14:37 +0200 | [diff] [blame] | 76 | def get_ppm(self): |
| 77 | return self.ppm |
ptrkrysik | dac3b2a | 2014-11-06 14:47:33 +0100 | [diff] [blame] | 78 | |
Piotr Krysik | cbaf476 | 2016-07-15 13:14:37 +0200 | [diff] [blame] | 79 | def set_ppm(self, ppm): |
| 80 | self.ppm = ppm |
| 81 | self.gsm_clock_offset_corrector_tagged_0.set_ppm(self.ppm) |
ptrkrysik | dac3b2a | 2014-11-06 14:47:33 +0100 | [diff] [blame] | 82 | |
| 83 | def get_samp_rate_in(self): |
| 84 | return self.samp_rate_in |
| 85 | |
| 86 | def set_samp_rate_in(self, samp_rate_in): |
| 87 | self.samp_rate_in = samp_rate_in |
Piotr Krysik | cbaf476 | 2016-07-15 13:14:37 +0200 | [diff] [blame] | 88 | self.gsm_clock_offset_corrector_tagged_0.set_samp_rate_in(self.samp_rate_in) |
ptrkrysik | 381253a | 2014-11-19 11:30:53 +0100 | [diff] [blame] | 89 | self.fractional_resampler_xx_0.set_resamp_ratio(self.samp_rate_in/self.samp_rate_out) |
ptrkrysik | dac3b2a | 2014-11-06 14:47:33 +0100 | [diff] [blame] | 90 | |
ptrkrysik | 381253a | 2014-11-19 11:30:53 +0100 | [diff] [blame] | 91 | def get_samp_rate_out(self): |
| 92 | return self.samp_rate_out |
| 93 | |
| 94 | def set_samp_rate_out(self, samp_rate_out): |
| 95 | self.samp_rate_out = samp_rate_out |
ptrkrysik | 381253a | 2014-11-19 11:30:53 +0100 | [diff] [blame] | 96 | self.fractional_resampler_xx_0.set_resamp_ratio(self.samp_rate_in/self.samp_rate_out) |
Piotr Krysik | cbaf476 | 2016-07-15 13:14:37 +0200 | [diff] [blame] | 97 | self.low_pass_filter_0_0.set_taps(firdes.low_pass(1, self.samp_rate_out, 125e3, 5e3, firdes.WIN_HAMMING, 6.76)) |