def test_complex_to_arg(self):
src_data = (1+2j, 3-4j, 5+6j, 7-8j, -9+10j)
expected_data = (atan2(2, 1), atan2(-4,3), atan2(6, 5), atan2(-8, 7), atan2(10,-9))
src = blocks.vector_source_c(src_data)
op = blocks.complex_to_arg()
dst = blocks.vector_sink_f()
self.tb.connect(src, op, dst)
self.tb.run()
self.assertFloatTuplesAlmostEqual(expected_data, dst.data(), 2)
def test_complex_to_arg(self):
src_data = (1 + 2j, 3 - 4j, 5 + 6j, 7 - 8j, -9 + 10j)
expected_data = (atan2(2, 1), atan2(-4, 3), atan2(6, 5), atan2(-8, 7),
atan2(10, -9))
src = blocks.vector_source_c(src_data)
op = blocks.complex_to_arg()
dst = blocks.vector_sink_f()
self.tb.connect(src, op, dst)
self.tb.run()
self.assertFloatTuplesAlmostEqual(expected_data, dst.data(), 2)
def do_check_phase_shift(self, type, name):
sps = 2
L = 1
in_bits = (1,) * 20
src = blocks.vector_source_b(in_bits, False)
cpm = digital.cpmmod_bc(type, 0.5, sps, L)
arg = blocks.complex_to_arg()
sink = blocks.vector_sink_f()
self.tb.connect(src, cpm, arg, sink)
self.tb.run()
symbol_phases = numpy.array(sink.data()[sps*L-1::sps])
phase_diff = numpy.mod(numpy.subtract(symbol_phases[1:], symbol_phases[:-1]),
(2*numpy.pi,) * (len(symbol_phases)-1))
self.assertFloatTuplesAlmostEqual(tuple(phase_diff), (0.5 * numpy.pi,) * len(phase_diff), 5,
msg="Phase shift was not correct for CPM method " + name)
def test_001_lgmsk(self):
sps = 2
L = 5
bt = 0.3
in_bits = (1,) * 20
src = blocks.vector_source_b(in_bits, False)
gmsk = digital.gmskmod_bc(sps, L, bt)
arg = blocks.complex_to_arg()
sink = blocks.vector_sink_f()
self.tb.connect(src, gmsk, arg, sink)
self.tb.run()
symbol_phases = numpy.array(sink.data()[sps*L-1::sps])
phase_diff = numpy.mod(numpy.subtract(symbol_phases[1:], symbol_phases[:-1]),
(2*numpy.pi,) * (len(symbol_phases)-1))
self.assertFloatTuplesAlmostEqual(tuple(phase_diff), (0.5 * numpy.pi,) * len(phase_diff), 5,
msg="Phase shift was not correct for GMSK")
def do_check_phase_shift(self, type, name):
sps = 2
L = 1
in_bits = (1, ) * 20
src = blocks.vector_source_b(in_bits, False)
cpm = digital.cpmmod_bc(type, 0.5, sps, L)
arg = blocks.complex_to_arg()
sink = blocks.vector_sink_f()
self.tb.connect(src, cpm, arg, sink)
self.tb.run()
symbol_phases = numpy.array(sink.data()[sps * L - 1::sps])
phase_diff = numpy.mod(
numpy.subtract(symbol_phases[1:], symbol_phases[:-1]),
(2 * numpy.pi, ) * (len(symbol_phases) - 1))
self.assertFloatTuplesAlmostEqual(
tuple(phase_diff), (0.5 * numpy.pi, ) * len(phase_diff),
5,
msg="Phase shift was not correct for CPM method " + name)
def test_001_lgmsk(self):
sps = 2
L = 5
bt = 0.3
in_bits = (1, ) * 20
src = blocks.vector_source_b(in_bits, False)
gmsk = digital.gmskmod_bc(sps, L, bt)
arg = blocks.complex_to_arg()
sink = blocks.vector_sink_f()
self.tb.connect(src, gmsk, arg, sink)
self.tb.run()
symbol_phases = numpy.array(sink.data()[sps * L - 1::sps])
phase_diff = numpy.mod(
numpy.subtract(symbol_phases[1:], symbol_phases[:-1]),
(2 * numpy.pi, ) * (len(symbol_phases) - 1))
self.assertFloatTuplesAlmostEqual(
tuple(phase_diff), (0.5 * numpy.pi, ) * len(phase_diff),
5,
msg="Phase shift was not correct for GMSK")
