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#!/usr/bin/env python
#
# Copyright 2012 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
import analog_swig as analog
import math
def avg_mag_sqrd_c(x, alpha):
y = [0,]
for xi in x:
tmp = alpha*(xi.real*xi.real + xi.imag*xi.imag) + (1-alpha)*y[-1]
y.append(tmp)
return y
def avg_mag_sqrd_f(x, alpha):
y = [0,]
for xi in x:
tmp = alpha*(xi*xi) + (1-alpha)*y[-1]
y.append(tmp)
return y
class test_probe_avg_mag_sqrd(gr_unittest.TestCase):
def setUp(self):
self.tb = gr.top_block()
def tearDown(self):
self.tb = None
def test_c_001(self):
alpha = 0.0001
src_data = [1.0+1.0j, 2.0+2.0j, 3.0+3.0j, 4.0+4.0j, 5.0+5.0j,
6.0+6.0j, 7.0+7.0j, 8.0+8.0j, 9.0+9.0j, 10.0+10.0j]
expected_result = avg_mag_sqrd_c(src_data, alpha)[-1]
src = gr.vector_source_c(src_data)
op = analog.probe_avg_mag_sqrd_c(0, alpha)
self.tb.connect(src, op)
self.tb.run()
result_data = op.level()
self.assertAlmostEqual(expected_result, result_data, 5)
def test_cf_002(self):
alpha = 0.0001
src_data = [1.0+1.0j, 2.0+2.0j, 3.0+3.0j, 4.0+4.0j, 5.0+5.0j,
6.0+6.0j, 7.0+7.0j, 8.0+8.0j, 9.0+9.0j, 10.0+10.0j]
expected_result = avg_mag_sqrd_c(src_data, alpha)[0:-1]
src = gr.vector_source_c(src_data)
op = analog.probe_avg_mag_sqrd_cf(0, alpha)
dst = gr.vector_sink_f()
self.tb.connect(src, op)
self.tb.connect(op, dst)
self.tb.run()
result_data = dst.data()
self.assertComplexTuplesAlmostEqual(expected_result, result_data, 5)
def test_f_003(self):
alpha = 0.0001
src_data = [1.0, 2.0, 3.0, 4.0, 5.0,
6.0, 7.0, 8.0, 9.0, 10.0]
expected_result = avg_mag_sqrd_f(src_data, alpha)[-1]
src = gr.vector_source_f(src_data)
op = analog.probe_avg_mag_sqrd_f(0, alpha)
self.tb.connect(src, op)
self.tb.run()
result_data = op.level()
self.assertAlmostEqual(expected_result, result_data, 5)
if __name__ == '__main__':
gr_unittest.run(test_probe_avg_mag_sqrd, "test_probe_avg_mag_sqrd.xml")
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