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#!/usr/bin/env python
#
# Copyright 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, blocks
import math
def sig_source_f(samp_rate, freq, amp, N):
t = [float(x) / samp_rate for x in range(N)]
y = [amp * math.cos(2. * math.pi * freq * x) for x in t]
return y
def sig_source_c(samp_rate, freq, amp, N):
t = [float(x) / samp_rate for x in range(N)]
y = [amp * math.cos(2. * math.pi * freq * x) +
1j * amp * math.sin(2. * math.pi * freq * x) for x in t]
return y
class test_rms(gr_unittest.TestCase):
def setUp(self):
self.tb = gr.top_block()
def tearDown(self):
self.tb = None
def test_ff(self):
amp = 2
src_data = sig_source_f(1, 0.01, amp, 200)
N = 750000
expected_data = amp / math.sqrt(2.0)
src = blocks.vector_source_f(src_data, True)
head = blocks.head(gr.sizeof_float, N)
op = blocks.rms_ff(0.0001)
dst = blocks.vector_sink_f()
self.tb.connect(src, head, op, dst)
self.tb.run()
dst_data = dst.data()
self.assertAlmostEqual(dst_data[-1], expected_data, 4)
def test_cf(self):
amp = 4
src_data = sig_source_c(1, 0.01, amp, 200)
N = 750000
expected_data = amp
src = blocks.vector_source_c(src_data, True)
head = blocks.head(gr.sizeof_gr_complex, N)
op = blocks.rms_cf(0.0001)
dst = blocks.vector_sink_f()
self.tb.connect(src, head, op, dst)
self.tb.run()
dst_data = dst.data()
self.assertAlmostEqual(dst_data[-1], expected_data, 4)
if __name__ == '__main__':
gr_unittest.run(test_rms)
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