modulation.h
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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.*/
- #ifndef __modulation_h__
- #define __modulation_h__
- /* ======================================================================
- Modulation Schemes
- Using the receive power and information about the modulation
- scheme, amount of forward error correction, etc., this class
- computes whether or not a packet was received correctly or with
- few enough errors that they can be tolerated.
- ====================================================================== */
- class Modulation {
- public:
- virtual ~Modulation () {}
- virtual int BitError(double) = 0; // success reception?
- protected:
- int Rs; // symbol rate per second
- private:
- // Probability of 1 bit error
- virtual double ProbBitError(double) = 0;
- // Probability of n bit errors
- virtual double ProbBitError(double, int) = 0;
- };
- class BPSK : public Modulation {
- public:
- BPSK(void);
- BPSK(int);
- virtual ~BPSK () {}
- virtual int BitError(double Pr);
- private:
- virtual double ProbBitError(double Pr);
- virtual double ProbBitError(double Pr, int n);
- };
- #endif /* __modulation_h__ */