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#!/usr/bin/env python
#
# Copyright 2006,2007,2010,2011,2013 Free Software Foundation, Inc.
#
# This file is part of GNU Radio
#
# SPDX-License-Identifier: GPL-3.0-or-later
#
#
from gnuradio import gr, gr_unittest, digital, blocks
class test_lms_dd_equalizer(gr_unittest.TestCase):
def setUp(self):
self.tb = gr.top_block()
def tearDown(self):
self.tb = None
def transform(self, src_data, gain, const):
SRC = blocks.vector_source_c(src_data, False)
EQU = digital.lms_dd_equalizer_cc(4, gain, 1, const.base())
DST = blocks.vector_sink_c()
self.tb.connect(SRC, EQU, DST)
self.tb.run()
return DST.data()
def test_001_identity(self):
# Constant modulus signal so no adjustments
const = digital.constellation_qpsk()
src_data = const.points() * 1000
N = 100 # settling time
expected_data = src_data[N:]
result = self.transform(src_data, 0.1, const)[N:]
N = -500
self.assertComplexTuplesAlmostEqual(expected_data[N:], result[N:], 5)
if __name__ == "__main__":
gr_unittest.run(test_lms_dd_equalizer)
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