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Diffstat (limited to 'gnuradio-examples/python/digital/pick_bitrate2.py')
| -rw-r--r-- | gnuradio-examples/python/digital/pick_bitrate2.py | 154 |
1 files changed, 0 insertions, 154 deletions
diff --git a/gnuradio-examples/python/digital/pick_bitrate2.py b/gnuradio-examples/python/digital/pick_bitrate2.py deleted file mode 100644 index 92539560c..000000000 --- a/gnuradio-examples/python/digital/pick_bitrate2.py +++ /dev/null @@ -1,154 +0,0 @@ -# -# Copyright 2010 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 eng_notation - -_default_bitrate = 500e3 -_sps_min = 2 -_sps_max = 100 - -def _pick_bitrate(bitrate, bits_per_symbol, samples_per_symbol, - xrate, converter_rate, xrates): - """ - @returns tuple (bitrate, samples_per_symbol, interp_rate_or_decim_rate) - """ - - if not isinstance(bits_per_symbol, int) or bits_per_symbol < 1: - raise ValueError, "bits_per_symbol must be an int >= 1" - - converter_rate = float(converter_rate) - bits_per_symbol = float(bits_per_symbol) - - # completely determined; if bitrate is specified, this overwrites it - if (samples_per_symbol is not None) and (xrate is not None): - bitrate = converter_rate / bits_per_symbol / xrate / samples_per_symbol - - # If only SPS is given - if (bitrate is None) and (samples_per_symbol is not None) and (xrate is None): - xrate = max(xrates) - bitrate = converter_rate / bits_per_symbol / xrate / samples_per_symbol - - # If only xrate is given, just set SPS to 2 and calculate bitrate - if (bitrate is None) and (samples_per_symbol is None) and (xrate is not None): - samples_per_symbol = 2.0 - bitrate = converter_rate / bits_per_symbol / xrate / samples_per_symbol - - # If no parameters are give, use the default bit rate - if (bitrate is None) and (samples_per_symbol is None) and (xrate is None): - bitrate = _default_bitrate - - # If only bitrate is specified, return max xrate and appropriate - # samples per symbol (minimum of 2.0) to reach bit rate - if (samples_per_symbol is None) and (xrate is None): - xrates.sort() - for i in xrange(len(xrates)): - if((converter_rate / bits_per_symbol / xrates[i]) >= 2*bitrate): - rate = xrates[i] - else: - break - - try: - xrate = rate - except UnboundLocalError: - raise ValueError("Requested bitrate out of bounds") - - samples_per_symbol = converter_rate / bits_per_symbol / rate / bitrate - bitrate = converter_rate / bits_per_symbol / xrate / samples_per_symbol - - # If bitrate and xrate are specified - if(samples_per_symbol is None): - samples_per_symbol = converter_rate / xrate / bits_per_symbol / bitrate - - # If bitrate and SPS are specified - if(xrate is None): - xrate = converter_rate / samples_per_symbol / bits_per_symbol / bitrate - if((xrate in xrates) == False): - # Find the closest avaiable rate larger than the calculated one - xrates.sort() - for x in xrates: - if(x > xrate): - xrate = x - break - if(xrate > max(xrates)): - xrate = max(xrates) - - bitrate = converter_rate / bits_per_symbol / xrate / samples_per_symbol - print "Could not find suitable rate for specified SPS and Bitrate" - print "Using rate = %d for bitrate of %sbps" % \ - (xrate, (eng_notation.num_to_str(bitrate))) - - if((xrate in xrates) == False): - raise ValueError(("Invalid rate (rate = %d)" % xrate)) - if((samples_per_symbol < _sps_min) or (samples_per_symbol > _sps_max)): - raise ValueError(("Invalid samples per symbol (sps = %.2f). Must be in [%.0f, %.0f]." \ - % (samples_per_symbol, _sps_min, _sps_max))) - - return (bitrate, samples_per_symbol, int(xrate)) - - -def pick_tx_bitrate(bitrate, bits_per_symbol, samples_per_symbol, - interp_rate, converter_rate, possible_interps): - """ - Given the 4 input parameters, return at configuration that matches - - @param bitrate: desired bitrate or None - @type bitrate: number or None - @param bits_per_symbol: E.g., BPSK -> 1, QPSK -> 2, 8-PSK -> 3 - @type bits_per_symbol: integer >= 1 - @param samples_per_symbol: samples/baud (aka samples/symbol) - @type samples_per_symbol: number or None - @param interp_rate: USRP interpolation factor - @type interp_rate: integer or None - @param converter_rate: converter sample rate in Hz - @type converter_rate: number - @param possible_interps: a list of possible rates - @type possible_interps: a list of integers - - @returns tuple (bitrate, samples_per_symbol, interp_rate) - """ - - return _pick_bitrate(bitrate, bits_per_symbol, samples_per_symbol, - interp_rate, converter_rate, possible_interps) - - -def pick_rx_bitrate(bitrate, bits_per_symbol, samples_per_symbol, - decim_rate, converter_rate, possible_decims): - """ - Given the 4 input parameters, return at configuration that matches - - @param bitrate: desired bitrate or None - @type bitrate: number or None - @param bits_per_symbol: E.g., BPSK -> 1, QPSK -> 2, 8-PSK -> 3 - @type bits_per_symbol: integer >= 1 - @param samples_per_symbol: samples/baud (aka samples/symbol) - @type samples_per_symbol: number or None - @param decim_rate: USRP decimation factor - @type decim_rate: integer or None - @param converter_rate: converter sample rate in Hz - @type converter_rate: number - @param possible_decims: a list of possible rates - @type possible_decims: a list of integers - - @returns tuple (bitrate, samples_per_symbol, decim_rate) - """ - - return _pick_bitrate(bitrate, bits_per_symbol, samples_per_symbol, - decim_rate, converter_rate, possible_decims) |