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/* -*- Mode:C++; c-basic-offset:8; tab-width:8; indent-tabs-mode:t -*- */
/*
* Copyright (c) 1997 Regents of the University of California.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the Computer Systems
* Engineering Group at Lawrence Berkeley Laboratory.
* 4. Neither the name of the University nor of the Laboratory may be used
* to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
/* Ported from CMU/Monarch's code, nov'98 -Padma.*/
#include <math.h>
#include <stdlib.h>
#include <random.h>
//#include <debug.h>
#include <modulation.h>
/* ======================================================================
Binary Phase Shift Keying
====================================================================== */
BPSK::BPSK()
{
Rs = 0;
}
BPSK::BPSK(int S)
{
Rs = S;
}
int
BPSK::BitError(double Pr)
{
double Pe; // probability of error
double x;
int nbit = 0; // number of bit errors tolerated
if(nbit == 0) {
Pe = ProbBitError(Pr);
}
else {
Pe = ProbBitError(Pr, nbit);
}
// quick check
if(Pe == 0.0)
return 0; // no bit errors
// scale the error probabilty
Pe *= 1e3;
x = (double)(((int)Random::uniform()) % 1000);
if(x < Pe)
return 1; // bit error
else
return 0; // no bit errors
}
double
BPSK::ProbBitError(double)
{
double Pe = 0.0;
return Pe;
}
double
BPSK::ProbBitError(double, int)
{
double Pe = 0.0;
return Pe;
}
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