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#!/usr/bin/env python
#
# Copyright 2004,2007,2010-2012 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
class test_pll_freqdet(gr_unittest.TestCase):
def setUp (self):
self.tb = gr.top_block()
def tearDown (self):
self.tb = None
def test_pll_freqdet(self):
expected_result = (0.0,
4.33888922882e-08,
0.367369994515,
1.08135249597,
2.10983253908,
3.42221529438,
4.98940390402,
6.78379190842,
8.77923286024,
10.9510106794,
13.2758363182,
15.7317829127,
18.2982902299,
20.9561068599,
23.6755271122,
26.452952094,
29.2731265301,
32.1219053479,
34.9862418188,
37.8540971414,
40.7144315483,
43.5571390869,
46.3730179743,
49.1537231663,
51.8917218889,
54.58026103,
57.2015358514,
59.7513664199,
62.2380533124,
64.657612252,
67.006640002,
69.2822432184,
71.4820384499,
73.6041047056,
75.6469478817,
77.6094829742,
79.4909866472,
81.2911031615,
83.0097850853,
84.6355598352,
86.1820937186,
87.6504420946,
89.0418441206,
90.3577286819,
91.5996432431,
92.7692775646,
93.8684162704,
94.8989269904,
95.8627662892,
96.7619381633,
97.598505899,
98.362769679,
99.0579904444,
99.6992633875,
100.288805948,
100.828805921,
101.321421457,
101.76878699,
102.17300138,
102.536116055,
102.860158727,
103.147085962,
103.398830608,
103.617254366,
103.792467691,
103.939387906,
104.060030865,
104.15631756,
104.230085975,
104.283067372,
104.316933727,
104.333238432,
104.333440018,
104.318914008,
104.290941063,
104.250742554,
104.187634452,
104.103822339,
104.013227468,
103.916810336,
103.815448432,
103.709936239,
103.600997093,
103.489283183,
103.375351833,
103.259712936,
103.142828952,
103.025091195,
102.90686726,
102.776726069,
102.648078982,
102.521459607,
102.397294831,
102.275999684,
102.157882471,
102.043215927,
101.93218978,
101.824958181,
101.72159228,
101.622151366)
sampling_freq = 10e3
freq = sampling_freq / 100
loop_bw = math.pi/100.0
maxf = 1
minf = -1
src = gr.sig_source_c(sampling_freq, gr.GR_COS_WAVE, freq, 1.0)
pll = analog.pll_freqdet_cf(loop_bw, maxf, minf)
head = gr.head(gr.sizeof_float, int (freq))
dst = gr.vector_sink_f()
self.tb.connect(src, pll, head)
self.tb.connect(head, dst)
self.tb.run()
dst_data = dst.data()
# convert it from normalized frequency to absolute frequency (Hz)
dst_data = [i*(sampling_freq/(2*math.pi)) for i in dst_data]
self.assertFloatTuplesAlmostEqual(expected_result, dst_data, 3)
if __name__ == '__main__':
gr_unittest.run(test_pll_freqdet, "test_pll_freqdet.xml")
|
