3 # Copyright 2004,2007 Free Software Foundation, Inc.
5 # This file is part of GNU Radio
7 # GNU Radio is free software; you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation; either version 3, or (at your option)
12 # GNU Radio is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with GNU Radio; see the file COPYING. If not, write to
19 # the Free Software Foundation, Inc., 51 Franklin Street,
20 # Boston, MA 02110-1301, USA.
23 from gnuradio import gr, gr_unittest
27 return math.cos(x) + math.sin(x) * 1j
30 class test_frequency_modulator (gr_unittest.TestCase):
33 self.tb = gr.top_block ()
38 def test_fm_001 (self):
41 src_data = (1.0/4, 1.0/2, 1.0/4, -1.0/4, -1.0/2, -1/4.0)
42 running_sum = (pi/16, 3*pi/16, pi/4, 3*pi/16, pi/16, 0)
43 expected_result = tuple ([sincos (x) for x in running_sum])
44 src = gr.vector_source_f (src_data)
45 op = gr.frequency_modulator_fc (sensitivity)
46 dst = gr.vector_sink_c ()
47 self.tb.connect (src, op)
48 self.tb.connect (op, dst)
50 result_data = dst.data ()
51 self.assertComplexTuplesAlmostEqual (expected_result, result_data)
54 if __name__ == '__main__':