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#!/usr/bin/env python
#
# Copyright 2014 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, gr_unittest, blocks
import fec_swig as fec
import numpy
import copy
class test_ber_bf(gr_unittest.TestCase):
def setUp(self):
self.tb = gr.top_block()
def tearDown(self):
self.tb = None
def test_000(self):
# Cause a single bit error out of 8*N bits
# using streaming mode
mode = False
N = 10000
data0 = numpy.random.randint(0, 256, N).tolist()
data1 = copy.deepcopy(data0)
data1[0] ^= 0x01
src0 = blocks.vector_source_b(data0)
src1 = blocks.vector_source_b(data1)
op = fec.ber_bf(mode)
dst = blocks.vector_sink_f()
self.tb.connect(src0, (op, 0))
self.tb.connect(src1, (op, 1))
self.tb.connect(op, dst)
self.tb.run()
data = dst.data()
expected_result = self.log_ber(1., N) # [numpy.log10(1.0 / (8.0 * N)), ]
self.assertFloatTuplesAlmostEqual(expected_result, data, 5)
def test_001(self):
# Cause a single bit error out of 8*N bits
# using test mode
mode = True
N = 1000
data0 = numpy.random.randint(0, 256, N).tolist()
data1 = copy.deepcopy(data0)
data1[0] ^= 0x01
src0 = blocks.vector_source_b(data0)
src1 = blocks.vector_source_b(data1)
op = fec.ber_bf(mode, 1)
dst = blocks.vector_sink_f()
self.tb.connect(src0, (op, 0))
self.tb.connect(src1, (op, 1))
self.tb.connect(op, dst)
self.tb.run()
data = dst.data()
expected_result = self.log_ber(1., N)
self.assertFloatTuplesAlmostEqual(expected_result, data, 5)
def test_002(self):
# Cause 8 bit errors out of 8*N bits
# using test mode
mode = True
N = 1000
data0 = numpy.random.randint(0, 256, N).tolist()
data1 = copy.deepcopy(data0)
data1[0] ^= 0xFF
src0 = blocks.vector_source_b(data0)
src1 = blocks.vector_source_b(data1)
op = fec.ber_bf(mode, 1, -2.0)
dst = blocks.vector_sink_f()
self.tb.connect(src0, (op, 0))
self.tb.connect(src1, (op, 1))
self.tb.connect(op, dst)
self.tb.run()
data = dst.data()
expected_result = self.log_ber(8., N)
self.assertFloatTuplesAlmostEqual(expected_result, data, 5)
def test_003(self):
# Cause a 8 bit errors out of 8*N bits
# using test mode
# Exit if BER < -2.0
mode = True
N = 1000
data0 = numpy.random.randint(0, 256, N).tolist()
data1 = copy.deepcopy(data0)
data1[0] ^= 0xFF
src0 = blocks.vector_source_b(data0)
src1 = blocks.vector_source_b(data1)
op = fec.ber_bf(mode, 10, -2.0)
dst = blocks.vector_sink_f()
self.tb.connect(src0, (op, 0))
self.tb.connect(src1, (op, 1))
self.tb.connect(op, dst)
self.tb.run()
data = dst.data()
expected_result = [-2.0, ]
print data
print expected_result
self.assertFloatTuplesAlmostEqual(expected_result, data, 5)
def test_004(self):
# Cause 16 consecutive bit errors out of 8*N bits
# make sure bytes are only read once.
# using streaming mode
mode = False
N = 10000
data0 = numpy.random.randint(0, 256, N).tolist()
data1 = copy.deepcopy(data0)
data1[0] ^= 0xFF
data1[1] ^= 0xFF
src0 = blocks.vector_source_b(data0)
src1 = blocks.vector_source_b(data1)
op = fec.ber_bf(mode)
dst = blocks.vector_sink_f()
self.tb.connect(src0, (op, 0))
self.tb.connect(src1, (op, 1))
self.tb.connect(op, dst)
self.tb.run()
data = dst.data()
expected_result = self.log_ber(16, N)
self.assertFloatTuplesAlmostEqual(expected_result, data, 5)
def log_ber(self, n_errors, N):
return numpy.log10(1. * n_errors / (8.0 * N)),
if __name__ == '__main__':
gr_unittest.run(test_ber_bf, "test_ber_bf.xml")
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