qa_gr_fxpt_vco.cc

这是用python语言写的一个数字广播的信号处理工具包。利用它

/* -*- c++ -*- */
/*
 * Copyright 2004,2005 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.
 */

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif
#include <qa_gr_fxpt_vco.h>
#include <gr_fxpt_vco.h>
#include <gr_vco.h>
#include <cppunit/TestAssert.h>
#include <iostream>
#include <stdio.h>
#include <unistd.h>
#include <math.h>

static const float SIN_COS_TOLERANCE = 1e-5;

static const float SIN_COS_K = 0.42;
static const float SIN_COS_AMPL = 0.8;

static const int SIN_COS_BLOCK_SIZE = 100000;

static double max_d(double a, double b)
{
  return fabs(a) > fabs(b) ? a : b;
}

void
qa_gr_fxpt_vco::t0 ()
{
  gr_vco<float,float>	ref_vco;
  gr_fxpt_vco		new_vco;
  double max_error = 0, max_phase_error = 0;
  float			input[SIN_COS_BLOCK_SIZE];

  for (int i = 0; i < SIN_COS_BLOCK_SIZE; i++){
	  input[i] = sin(i);
  }

  for (int i = 0; i < SIN_COS_BLOCK_SIZE; i++){
    float ref_cos = ref_vco.cos ();
    float new_cos = new_vco.cos ();
    CPPUNIT_ASSERT_DOUBLES_EQUAL (ref_cos, new_cos, SIN_COS_TOLERANCE);

    max_error = max_d (max_error, ref_cos-new_cos);

    ref_vco.adjust_phase (input[i]);
    new_vco.adjust_phase (input[i]);

    CPPUNIT_ASSERT_DOUBLES_EQUAL (ref_vco.get_phase(), new_vco.get_phase(), SIN_COS_TOLERANCE);

    max_phase_error = max_d (max_phase_error, ref_vco.get_phase()-new_vco.get_phase());
  }
  // printf ("Fxpt  max error %.9f, max phase error %.9f\n", max_error, max_phase_error);
}


void
qa_gr_fxpt_vco::t1 ()
{
  gr_vco<float,float>	ref_vco;
  gr_fxpt_vco		new_vco;
  float			ref_block[SIN_COS_BLOCK_SIZE];
  float			new_block[SIN_COS_BLOCK_SIZE];
  float			input[SIN_COS_BLOCK_SIZE];
  double max_error = 0;

  for (int i = 0; i < SIN_COS_BLOCK_SIZE; i++){
	  input[i] = sin(i);
  }

  ref_vco.cos (ref_block, input, SIN_COS_BLOCK_SIZE, SIN_COS_K, SIN_COS_AMPL);
  new_vco.cos (new_block, input, SIN_COS_BLOCK_SIZE, SIN_COS_K, SIN_COS_AMPL);

  for (int i = 0; i < SIN_COS_BLOCK_SIZE; i++){
    CPPUNIT_ASSERT_DOUBLES_EQUAL (ref_block[i], new_block[i], SIN_COS_TOLERANCE);
    max_error = max_d (max_error, ref_block[i]-new_block[i]);
  }
  CPPUNIT_ASSERT_DOUBLES_EQUAL (ref_vco.get_phase(), new_vco.get_phase(), SIN_COS_TOLERANCE);
  // printf ("Fxpt  max error %.9f, max phase error %.9f\n", max_error, ref_vco.get_phase()-new_vco.get_phase());
}

void
qa_gr_fxpt_vco::t2 ()
{
}

void
qa_gr_fxpt_vco::t3 ()
{
}