402 lines
16 KiB
Python
Executable File
402 lines
16 KiB
Python
Executable File
#!/usr/bin/env python
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# -*- coding: utf-8 -*-
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# @file
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# @author (C) 2015 by Piotr Krysik <ptrkrysik@gmail.com>
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# @author (C) 2015 by Roman Khassraf <rkhassraf@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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from gnuradio import blocks
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from gnuradio import gr
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from gnuradio import eng_notation
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from gnuradio.eng_option import eng_option
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from gnuradio.filter import firdes
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from gnuradio.filter import pfb
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from math import pi
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from optparse import OptionParser
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import grgsm
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import numpy
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import os
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import osmosdr
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import pmt
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import time
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# from wideband_receiver import *
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class receiver_with_decoder(grgsm.hier_block):
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def __init__(self, OSR=4, chan_num=0, fc=939.4e6, ppm=0, samp_rate=0.2e6):
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grgsm.hier_block.__init__(
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self, "Receiver With Decoder",
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gr.io_signature(1, 1, gr.sizeof_gr_complex * 1),
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gr.io_signature(0, 0, 0),
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)
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self.message_port_register_hier_out("bursts")
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self.message_port_register_hier_out("msgs")
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##################################################
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# Parameters
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##################################################
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self.OSR = OSR
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self.chan_num = chan_num
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self.fc = fc
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self.ppm = ppm
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self.samp_rate = samp_rate
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##################################################
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# Variables
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##################################################
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self.samp_rate_out = samp_rate_out = 1625000.0 / 6.0 * OSR
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##################################################
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# Blocks
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##################################################
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self.gsm_receiver_0 = grgsm.receiver(OSR, ([chan_num]), ([]))
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self.gsm_input_0 = grgsm.gsm_input(
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ppm=ppm,
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osr=OSR,
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fc=fc,
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samp_rate_in=samp_rate,
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)
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self.gsm_control_channels_decoder_0 = grgsm.control_channels_decoder()
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self.gsm_clock_offset_control_0 = grgsm.clock_offset_control(fc, samp_rate, osr=4)
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self.gsm_bcch_ccch_demapper_0 = grgsm.gsm_bcch_ccch_demapper(0)
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##################################################
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# Connections
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##################################################
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self.msg_connect(self.gsm_bcch_ccch_demapper_0, 'bursts', self, 'bursts')
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self.msg_connect(self.gsm_bcch_ccch_demapper_0, 'bursts', self.gsm_control_channels_decoder_0, 'bursts')
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self.msg_connect(self.gsm_clock_offset_control_0, 'ctrl', self.gsm_input_0, 'ctrl_in')
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self.msg_connect(self.gsm_control_channels_decoder_0, 'msgs', self, 'msgs')
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self.msg_connect(self.gsm_receiver_0, 'C0', self.gsm_bcch_ccch_demapper_0, 'bursts')
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self.msg_connect(self.gsm_receiver_0, 'measurements', self.gsm_clock_offset_control_0, 'measurements')
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self.connect((self.gsm_input_0, 0), (self.gsm_receiver_0, 0))
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self.connect((self, 0), (self.gsm_input_0, 0))
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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(1625000.0 / 6.0 * self.OSR)
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self.gsm_input_0.set_osr(self.OSR)
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def get_chan_num(self):
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return self.chan_num
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def set_chan_num(self, chan_num):
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self.chan_num = chan_num
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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_input_0.set_fc(self.fc)
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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_input_0.set_ppm(self.ppm)
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def get_samp_rate(self):
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return self.samp_rate
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def set_samp_rate(self, samp_rate):
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self.samp_rate = samp_rate
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self.gsm_input_0.set_samp_rate_in(self.samp_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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class wideband_receiver(grgsm.hier_block):
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def __init__(self, OSR=4, fc=939.4e6, samp_rate=0.4e6):
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grgsm.hier_block.__init__(
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self, "Wideband receiver",
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gr.io_signature(1, 1, gr.sizeof_gr_complex * 1),
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gr.io_signature(0, 0, 0),
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)
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self.message_port_register_hier_out("bursts")
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self.message_port_register_hier_out("msgs")
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self.__init(OSR, fc, samp_rate)
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def __init(self, OSR=4, fc=939.4e6, samp_rate=0.4e6):
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##################################################
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# Parameters
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##################################################
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self.OSR = OSR
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self.fc = fc
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self.samp_rate = samp_rate
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self.channels_num = int(samp_rate / 0.2e6)
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self.OSR_PFB = 2
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##################################################
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# Blocks
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##################################################
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self.pfb_channelizer_ccf_0 = pfb.channelizer_ccf(
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self.channels_num,
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(),
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self.OSR_PFB,
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100)
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self.pfb_channelizer_ccf_0.set_channel_map(([]))
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self.create_receivers()
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##################################################
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# Connections
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##################################################
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self.connect((self, 0), (self.pfb_channelizer_ccf_0, 0))
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for chan in xrange(0, self.channels_num):
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self.connect((self.pfb_channelizer_ccf_0, chan), (self.receivers_with_decoders[chan], 0))
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self.msg_connect(self.receivers_with_decoders[chan], 'bursts', self, 'bursts')
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self.msg_connect(self.receivers_with_decoders[chan], 'msgs', self, 'msgs')
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def create_receivers(self):
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self.receivers_with_decoders = {}
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for chan in xrange(0, self.channels_num):
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self.receivers_with_decoders[chan] = receiver_with_decoder(fc=self.fc, OSR=self.OSR, chan_num=chan,
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samp_rate=self.OSR_PFB * 0.2e6)
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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.create_receivers()
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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.create_receivers()
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def get_samp_rate(self):
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return self.samp_rate
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class wideband_scanner(gr.top_block):
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def __init__(self, rec_len=3, sample_rate=2e6, carrier_frequency=939e6, gain=24, ppm=0, args=""):
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gr.top_block.__init__(self, "Wideband Scanner")
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self.rec_len = rec_len
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self.sample_rate = sample_rate
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self.carrier_frequency = carrier_frequency
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self.ppm = ppm
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# if no file name is given process data from rtl_sdr source
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print "Args=", args
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self.rtlsdr_source = osmosdr.source(args="numchan=" + str(1) + " " + args)
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self.rtlsdr_source.set_min_output_buffer(int(sample_rate*rec_len))
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self.rtlsdr_source.set_sample_rate(sample_rate)
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# capture half of GSM channel lower than channel center (-0.1MHz)
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# this is needed when even number of channels is captured in order to process full captured bandwidth
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self.rtlsdr_source.set_center_freq(carrier_frequency - 0.1e6, 0)
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# correction of central frequency
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# if the receiver has large frequency offset
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# the value of this variable should be set close to that offset in ppm
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self.rtlsdr_source.set_freq_corr(ppm, 0)
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self.rtlsdr_source.set_dc_offset_mode(2, 0)
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self.rtlsdr_source.set_iq_balance_mode(0, 0)
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self.rtlsdr_source.set_gain_mode(True, 0)
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self.rtlsdr_source.set_bandwidth(sample_rate, 0)
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self.rtlsdr_source.set_gain(gain, 0)
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self.rtlsdr_source.set_if_gain(32, 0)
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self.rtlsdr_source.set_bb_gain(30, 0)
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self.head = blocks.head(gr.sizeof_gr_complex * 1, int(rec_len * sample_rate))
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# shift again by -0.1MHz in order to align channel center in 0Hz
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self.blocks_rotator_cc = blocks.rotator_cc(-2 * pi * 0.1e6 / sample_rate)
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self.wideband_receiver = wideband_receiver(OSR=4, fc=carrier_frequency, samp_rate=sample_rate)
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self.gsm_extract_system_info = grgsm.extract_system_info()
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self.connect((self.rtlsdr_source, 0), (self.head, 0))
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self.connect((self.head, 0), (self.blocks_rotator_cc, 0))
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self.connect((self.blocks_rotator_cc, 0), (self.wideband_receiver, 0))
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self.msg_connect(self.wideband_receiver, 'msgs', self.gsm_extract_system_info, 'msgs')
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def set_carrier_frequency(self, carrier_frequency):
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self.carrier_frequency = carrier_frequency
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self.rtlsdr_source.set_center_freq(carrier_frequency - 0.1e6, 0)
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class channel_info(object):
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def __init__(self, arfcn, freq, cid, lac, mcc, mnc, ccch_conf, power, neighbours, cell_arfcns):
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self.arfcn = arfcn
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self.freq = freq
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self.cid = cid
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self.lac = lac
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self.mcc = mcc
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self.mnc = mnc
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self.ccch_conf = ccch_conf
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self.power = power
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self.neighbours = neighbours
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self.cell_arfcns = cell_arfcns
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def get_verbose_info(self):
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i = " |---- Configuration: %s\n" % self.get_ccch_conf()
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i += " |---- Cell ARFCNs: " + ", ".join(map(str, self.cell_arfcns)) + "\n"
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i += " |---- Neighbour Cells: " + ", ".join(map(str, self.neighbours)) + "\n"
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return i
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def get_ccch_conf(self):
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if self.ccch_conf == 0:
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return "1 CCCH, not combined"
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elif self.ccch_conf == 1:
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return "1 CCCH, combined"
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elif self.ccch_conf == 2:
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return "2 CCCH, not combined"
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elif self.ccch_conf == 4:
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return "3 CCCH, not combined"
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elif self.ccch_conf == 6:
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return "4 CCCH, not combined"
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else:
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return "Unknown"
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def getKey(self):
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return self.arfcn
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def __cmp__(self, other):
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if hasattr(other, 'getKey'):
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return self.getKey().__cmp__(other.getKey())
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def __repr__(self):
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return "ARFCN: %4u, Freq: %6.1fM, CID: %5u, LAC: %5u, MCC: %3u, MNC: %3u, Pwr: %3i" % (
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self.arfcn, self.freq / 1e6, self.cid, self.lac, self.mcc, self.mnc, self.power)
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if __name__ == '__main__':
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parser = OptionParser(option_class=eng_option, usage="%prog: [options]")
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bands_list = ", ".join(grgsm.arfcn.get_bands())
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parser.add_option("-b", "--band", dest="band", default="P-GSM",
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help="Specify the GSM band for the frequency.\nAvailable bands are: " + bands_list)
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parser.add_option("-s", "--samp-rate", dest="samp_rate", type="float", default=2e6,
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help="Set sample rate [default=%default] - allowed values even_number*0.2e6")
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parser.add_option("-p", "--ppm", dest="ppm", type="intx", default=0,
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help="Set frequency correction in ppm [default=%default]")
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parser.add_option("-g", "--gain", dest="gain", type="eng_float", default=24.0,
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help="Set gain [default=%default]")
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parser.add_option("", "--args", dest="args", type="string", default="",
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help="Set device arguments [default=%default]")
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parser.add_option("--speed", dest="speed", type="intx", default=4,
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help="Scan speed [default=%default]. Value range 0-5.")
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parser.add_option("-v", "--verbose", action="store_true",
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help="If set, verbose information output is printed: ccch configuration, cell ARFCN's, neighbour ARFCN's")
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"""
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Dont forget: sudo sysctl kernel.shmmni=32000
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"""
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(options, args) = parser.parse_args()
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if options.band not in grgsm.arfcn.get_bands():
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parser.error("Invalid GSM band\n")
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if options.speed < 0 or options.speed > 5:
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parser.error("Invalid scan speed.\n")
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if (options.samp_rate / 0.2e6) % 2 != 0:
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parser.error("Invalid sample rate. Sample rate must be an even numer * 0.2e6")
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channels_num = int(options.samp_rate / 0.2e6)
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print ""
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for arfcn_range in grgsm.arfcn.get_arfcn_ranges(options.band):
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first_arfcn = arfcn_range[0]
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last_arfcn = arfcn_range[1]
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last_center_arfcn = last_arfcn - int((channels_num / 2) - 1)
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current_freq = grgsm.arfcn.arfcn2downlink(first_arfcn + int(channels_num / 2) - 1, options.band)
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last_freq = grgsm.arfcn.arfcn2downlink(last_center_arfcn, options.band)
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stop_freq = last_freq + 0.2e6 * channels_num
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while current_freq < stop_freq:
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# silence rtl_sdr output:
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# open 2 fds
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null_fds = [os.open(os.devnull, os.O_RDWR) for x in xrange(2)]
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# save the current file descriptors to a tuple
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save = os.dup(1), os.dup(2)
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# put /dev/null fds on 1 and 2
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os.dup2(null_fds[0], 1)
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os.dup2(null_fds[1], 2)
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# instantiate scanner and processor
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scanner = wideband_scanner(rec_len=6 - options.speed,
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sample_rate=options.samp_rate,
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carrier_frequency=current_freq,
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ppm=options.ppm, gain=options.gain, args=options.args)
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# start recording
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scanner.start()
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scanner.wait()
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scanner.stop()
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freq_offsets = numpy.fft.ifftshift(
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numpy.array(range(int(-numpy.floor(channels_num / 2)), int(numpy.floor((channels_num + 1) / 2)))) * 2e5)
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detected_c0_channels = scanner.gsm_extract_system_info.get_chans()
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found_list = []
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if detected_c0_channels:
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chans = numpy.array(scanner.gsm_extract_system_info.get_chans())
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found_freqs = current_freq + freq_offsets[(chans)]
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cell_ids = numpy.array(scanner.gsm_extract_system_info.get_cell_id())
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lacs = numpy.array(scanner.gsm_extract_system_info.get_lac())
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mccs = numpy.array(scanner.gsm_extract_system_info.get_mcc())
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mncs = numpy.array(scanner.gsm_extract_system_info.get_mnc())
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ccch_confs = numpy.array(scanner.gsm_extract_system_info.get_ccch_conf())
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powers = numpy.array(scanner.gsm_extract_system_info.get_pwrs())
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for i in range(0, len(chans)):
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cell_arfcn_list = scanner.gsm_extract_system_info.get_cell_arfcns(chans[i])
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neighbour_list = scanner.gsm_extract_system_info.get_neighbours(chans[i])
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info = channel_info(grgsm.arfcn.downlink2arfcn(found_freqs[i], options.band), found_freqs[i],
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cell_ids[i], lacs[i], mccs[i], mncs[i], ccch_confs[i], powers[i],
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neighbour_list, cell_arfcn_list)
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found_list.append(info)
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scanner = None
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# restore file descriptors so we can print the results
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os.dup2(save[0], 1)
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os.dup2(save[1], 2)
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# close the temporary fds
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os.close(null_fds[0])
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os.close(null_fds[1])
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for info in sorted(found_list):
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print info
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if options.verbose:
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print info.get_verbose_info()
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current_freq += channels_num * 0.2e6
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