3 * Copyright 2002 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 #include <cppunit/TestAssert.h>
24 #include <qa_gri_mmse_fir_interpolator.h>
25 #include <gri_mmse_fir_interpolator.h>
29 #define NELEM(x) (sizeof (x) / sizeof (x[0]))
33 test_fcn (double index)
35 return (2 * sin (index * 0.25 * 2 * M_PI + 0.125 * M_PI)
36 + 3 * sin (index * 0.077 * 2 * M_PI + 0.3 * M_PI));
41 qa_gri_mmse_fir_interpolator::t1 ()
43 static const unsigned N = 100;
46 for (unsigned i = 0; i < NELEM(input); i++)
47 input[i] = test_fcn ((double) i);
49 gri_mmse_fir_interpolator intr;
50 float inv_nsteps = 1.0 / intr.nsteps ();
52 for (unsigned i = 0; i < N; i++){
53 for (unsigned imu = 0; imu <= intr.nsteps (); imu += 1){
54 float expected = test_fcn ((i + 3) + imu * inv_nsteps);
55 float actual = intr.interpolate (&input[i], imu * inv_nsteps);
57 CPPUNIT_ASSERT_DOUBLES_EQUAL (expected, actual, 0.004);
58 // printf ("%9.6f %9.6f %9.6f\n", expected, actual, expected - actual);