gnuradio-examples/python/apps/hf_radio/Makefile \
gnuradio-examples/python/apps/Makefile \
gnuradio-examples/python/audio/Makefile \
- gnuradio-examples/python/dect/Makefile \
gnuradio-examples/python/digital/Makefile \
gnuradio-examples/python/digital_voice/Makefile \
gnuradio-examples/python/digital-bert/Makefile \
SUBDIRS = \
apps \
audio \
- dect \
digital \
digital-bert \
digital_voice \
+++ /dev/null
-#
-# Copyright 2007 Free Software Foundation, Inc.
-#
-# This file is part of GNU Radio
-#
-# GNU Radio is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 3, or (at your option)
-# any later version.
-#
-# GNU Radio is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with GNU Radio; see the file COPYING. If not, write to
-# the Free Software Foundation, Inc., 51 Franklin Street,
-# Boston, MA 02110-1301, USA.
-#
-
-include $(top_srcdir)/Makefile.common
-
-EXTRA_DIST = \
- README \
- dect_receiver.py \
- usrp_source.py \
- usrp_dect.py
-
-ourdatadir = $(exampledir)/dect
-ourdata_DATA = $(EXTRA_DIST)
-
-MOSTLYCLEANFILES = *.pyc *~
+++ /dev/null
-This directory contains a work in progress service monitor for DECT
-digital cordless phone base stations and handsets.
-
-
-Status
-------
-
-2007 Apr 27 - Converted to new hier_block2 format
-2007 Apr 03 - Development on hold.
-2007 Feb 11 - Added GMSK demodulation and option to log to file
-2007 Feb 10 - Able to tune and log filtered baseband to file
-
-
-Files
------
-
-usrp_dect.py - DECT receiver application
-
-dect_receiver.py - Top-level hierarchical block (new type) implementing
- receiver
-
-usrp_source.py - Hierarchical block (new type) implementing a USRP
- complex source, with convenience functions for tuning,
- gain, decimation, etc.
-
-gmsk2.py - Hierarchical block (new type) implementing GMSK
- modulation and demodulation. This will eventually go
- into the core blksimpl directory
-
-DECT Modulation Details
------------------------
-
-In the US, the FCC has allocated four carrier frequencies for DECT usage:
-
-Channel Frequency
-------- ---------
- 1 1921.536 MHz
- 2 1923.264 MHz
- 3 1924.992 MHz
- 4 1926.720 MHz
-
-These are spaced at 1.728 MHz intervals.
-
-The DECT PHY uses GMSK with a 0.5 bandwidth-time product at 1.152 Msym/sec,
-for an occupied bandwidth (99% power) of 1.186 MHz (1.03 x symbol rate.)
-
+++ /dev/null
-#!/usr/bin/env python
-#
-# Copyright 2007 Free Software Foundation, Inc.
-#
-# This file is part of GNU Radio
-#
-# GNU Radio is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 3, or (at your option)
-# any later version.
-#
-# GNU Radio is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with GNU Radio; see the file COPYING. If not, write to
-# the Free Software Foundation, Inc., 51 Franklin Street,
-# Boston, MA 02110-1301, USA.
-#
-
-from gnuradio import gr, optfir, blks2
-from usrp_source import usrp_source_c
-
-_dect_symbol_rate = 1.152e6
-_dect_occupied_bandwidth = _dect_symbol_rate * 1.03 # BT=0.5
-_dect_channel_bandwidth = 1.728e6
-
-# Top-level hierarchical block that implements DECT demodulation and
-# decoding.
-class dect_receiver(gr.top_block):
- def __init__(self, options):
- gr.top_block.__init__(self, "dect_receiver")
- self._options = options
-
- # Need greater than 2 samples per symbol. This makes a decimation
- # rate of 26 and a samples per symbol of 2.136752
- if_rate = 2.461538e6
- self._usrp = usrp_source_c(which=0,
- subdev_spec=options.rx_subdev_spec,
- if_rate=if_rate,
- gain=options.gain,
- freq=options.freq,
- calibration=options.calibration,
- verbose=options.verbose)
-
- # Filter baseband to 1.186 MHz passband, 1.728 MHz stopband
- chan_taps = optfir.low_pass(1.0, # Gain
- if_rate, # Sample rate
- _dect_occupied_bandwidth/2, # One sided modulation bandwidth
- _dect_channel_bandwidth/2, # One sided channel bandwidth
- 1.0, # Passband ripple (db)
- 60) # Stopband attenuation (db)
- if self._options.verbose:
- print "Channel filter has", len(chan_taps), "taps"
- self._channel_filter = gr.freq_xlating_fir_filter_ccf(1, # Decimation rate
- chan_taps, # Filter taps
- 0.0, # Offset frequency
- if_rate) # Sample rate
-
- self._demod = blks2.gmsk_demod(samples_per_symbol=if_rate/_dect_symbol_rate,
- verbose=options.verbose)
-
- self._sink = gr.null_sink(gr.sizeof_char)
- self.connect(self._usrp, self._channel_filter, self._demod, self._sink)
-
- # Log baseband to file if requested
- if options.log_baseband is not None:
- if options.verbose:
- print "Logging baseband to file", options.log_baseband
- self.baseband_log = gr.file_sink(gr.sizeof_gr_complex, options.log_baseband)
- self.connect(self._channel_filter, self.baseband_log)
-
- # Log demodulator output to file if requested
- if options.log_demod is not None:
- if options.verbose:
- print "Logging demodulator to file", options.log_demod
- self.demod_log = gr.file_sink(gr.sizeof_char, options.log_demod)
- self.connect(self._demod, self.demod_log)
+++ /dev/null
-#!/usr/bin/env python
-#
-# Copyright 2007 Free Software Foundation, Inc.
-#
-# This file is part of GNU Radio
-#
-# GNU Radio is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 3, or (at your option)
-# any later version.
-#
-# GNU Radio is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with GNU Radio; see the file COPYING. If not, write to
-# the Free Software Foundation, Inc., 51 Franklin Street,
-# Boston, MA 02110-1301, USA.
-#
-
-from gnuradio import gr, eng_notation
-from gnuradio.eng_option import eng_option
-from optparse import OptionParser
-from dect_receiver import dect_receiver
-import sys
-
-def main():
- parser = OptionParser(option_class=eng_option)
- parser.add_option("-R", "--rx-subdev-spec", type="subdev", default=None,
- help="select USRP Rx side A or B (default=first one with a daughterboard)")
- parser.add_option("-f", "--freq", type="eng_float", default=None,
- help="set frequency to FREQ", metavar="FREQ")
- parser.add_option("", "--calibration", type="eng_float", default=0.0,
- help="set frequency calibration offset to FREQ")
- parser.add_option("-g", "--gain", type="eng_float", default=None,
- help="set gain in dB (default is midpoint)")
- parser.add_option("-v", "--verbose", action="store_true", default=False,
- help="print extra debugging info")
- parser.add_option("", "--log-baseband", default=None,
- help="log filtered baseband to file")
- parser.add_option("", "--log-demod", default=None,
- help="log demodulator output to file")
- (options, args) = parser.parse_args()
-
- if len(sys.argv) == 1 or len(args) != 0:
- parser.print_help()
- sys.exit(1)
-
- # Create an instance of a hierarchical block
- top_block = dect_receiver(options)
-
- try:
- # Run forever
- top_block.run()
- except KeyboardInterrupt:
- # Ctrl-C exits
- pass
-
-if __name__ == '__main__':
- main ()
+++ /dev/null
-#!/usr/bin/env python
-#
-# Copyright 2007 Free Software Foundation, Inc.
-#
-# This file is part of GNU Radio
-#
-# GNU Radio is free software; you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation; either version 3, or (at your option)
-# any later version.
-#
-# GNU Radio is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with GNU Radio; see the file COPYING. If not, write to
-# the Free Software Foundation, Inc., 51 Franklin Street,
-# Boston, MA 02110-1301, USA.
-#
-
-from gnuradio import gr, usrp, eng_notation
-n2s = eng_notation.num_to_str
-
-# Hierarchical block implementing a USRP source for complex floats,
-# with convenience functions for gain, tune, decimation, etc.
-#
-class usrp_source_c(gr.hier_block2):
- """
- Create a USRP source object supplying complex floats.
- """
- def __init__(self, which=0, subdev_spec=None, gain=None, if_rate=None,
- freq=0.0, calibration=0.0, verbose=False):
- # Call hierarchical block constructor
- gr.hier_block2.__init__(self,
- "usrp_source_c", # Block typename
- gr.io_signature(0,0,0), # Input signature
- gr.io_signature(1,1,gr.sizeof_gr_complex)) # Output signature
-
- self._verbose = verbose
- self._u = usrp.source_c(which)
- if self._verbose:
- print 'ADC sample rate is', n2s(self._u.adc_rate()), "sps"
- self.set_subdev(subdev_spec)
- self.set_if_rate(if_rate)
- self.set_gain(gain)
- self.set_calibration(calibration)
- self.tune(freq)
- self.connect(self._u, self)
-
- def set_subdev(self, subdev_spec):
- if subdev_spec is None:
- subdev_spec = self.pick_subdevice()
- self._subdev = usrp.selected_subdev(self._u, subdev_spec)
- self._u.set_mux(usrp.determine_rx_mux_value(self._u, subdev_spec))
- if self._verbose:
- print 'RX using', self._subdev.name(), 'daughterboard'
-
- def pick_subdevice(self):
- """
- The user didn't specify a subdevice.
- If there's a daughterboard on A, select A.
- If there's a daughterboard on B, select B.
- Otherwise, select A.
- """
- if self._u.db(0, 0).dbid() >= 0: # dbid is < 0 if there's no d'board or a problem
- return (0, 0)
- if self._u.db(1, 0).dbid() >= 0:
- return (1, 0)
- return (0, 0)
-
- def set_if_rate(self, if_rate):
- # If no IF rate specified, set to maximum decimation
- if if_rate is None:
- self._decim = 256
- else:
- self._decim = int(self._u.adc_rate()/if_rate)
-
- self._u.set_decim_rate(self._decim)
- self._if_rate = self._u.adc_rate()/self._decim
-
- if self._verbose:
- print "USRP decimation rate is", self._decim
- print "USRP IF rate is", n2s(self._if_rate), "sps"
-
- def set_gain(self, gain):
- # If no gain specified, set to midrange
- if gain is None:
- g = self._subdev.gain_range()
- gain = (g[0]+g[1])/2.0
- self._gain = gain
- self._subdev.set_gain(self._gain)
-
- def set_calibration(self, calibration):
- self._cal = calibration
- if self._verbose:
- print "Using frequency calibration offset of", n2s(calibration), "Hz"
-
- def tune(self, freq):
- """
- Set the center frequency we're interested in.
-
- @param target_freq: frequency in Hz
- @type: bool
-
- Tuning is a two step process. First we ask the front-end to
- tune as close to the desired frequency as it can. Then we use
- the result of that operation and our target_frequency to
- determine the value for the digital down converter.
- """
- self._tune_result = usrp.tune(self._u, 0, self._subdev, freq+self._cal)
- if self._tune_result:
- if self._verbose:
- print "Baseband frequency is", n2s(self._tune_result.baseband_freq), "Hz"
- print "DXC frequency is", n2s(self._tune_result.dxc_freq), "Hz"
- print "Center frequency is", n2s(freq), "Hz"
- print "Residual frequency is", n2s(self._tune_result.residual_freq), "Hz"
- return True
-
- return False
-
-if __name__ == '__main__':
- src = usrp_source_c(verbose=True)
projects / debian / gnuradio / commitdiff