SPUC::MOD_PAM Class Reference
[Digital Modulation]

M-ary PAM modulator. More...

#include <modulator.h>

List of all members.

Public Member Functions
	MOD_PAM (int Mary)
	Constructor.
virtual	~MOD_PAM ()
	Destructor.
void	modulate_bits (const bvec &bits, vec &out)
	Modulate bits into PAM symbols.
vec	modulate_bits (const bvec &bits)
	Modulate bits into PAM symbols.
void	demodulate_bits (const vec &signal, bvec &out)
	Demodulation of PAM symbols to bits.
bvec	demodulate_bits (const vec &signal)
	Demodulation of PAM symbols to bits.
void	set_M (int Mary)
	Set the size of the signal constellation.
Protected Attributes
int	k
	Number of bits per modulation symbol.
int	M
	Number of modulation symbols.
bmat	bitmap
	Bit patterns for symbols in order of symbol number.
ivec	bits2symbols
	Bit pattern in decimal form ordered and the corresponding symbols.
vec	symbols
	A vector containing the modulation symbols.
double	average_energy
	The average signal energy of the constallation.
double	scaling_factor
	Scaling factor used to normalize the average energy to 1.

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Detailed Description

M-ary PAM modulator.

Mary-PAM signals . Symbol numbering is from right to left in increasing order. Gray encoded bitmapping is used.

The symbols are normalized so that the average energy is 1. That is, normalized with .

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Constructor & Destructor Documentation

SPUC::MOD_PAM::MOD_PAM (  int  Mary  )  [inline]

Constructor. Here is the call graph for this function:

virtual SPUC::MOD_PAM::~MOD_PAM (   )  [inline, virtual]

Destructor.

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Member Function Documentation

bvec MOD_PAM::demodulate_bits (  const vec &  signal  )

Demodulation of PAM symbols to bits.

void MOD_PAM::demodulate_bits (  const vec &  signal, bvec &  out )

Demodulation of PAM symbols to bits.

vec MOD_PAM::modulate_bits (  const bvec &  bits  )

Modulate bits into PAM symbols.

void MOD_PAM::modulate_bits (  const bvec &  bits, vec &  out )

Modulate bits into PAM symbols.

void MOD_PAM::set_M (  int  Mary  )

Set the size of the signal constellation.

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Member Data Documentation

double SPUC::MOD_PAM::average_energy [protected]

The average signal energy of the constallation.

bmat SPUC::MOD_PAM::bitmap [protected]

Bit patterns for symbols in order of symbol number.

ivec SPUC::MOD_PAM::bits2symbols [protected]

Bit pattern in decimal form ordered and the corresponding symbols.

int SPUC::MOD_PAM::k [protected]

Number of bits per modulation symbol.

int SPUC::MOD_PAM::M [protected]

Number of modulation symbols.

double SPUC::MOD_PAM::scaling_factor [protected]

Scaling factor used to normalize the average energy to 1.

vec SPUC::MOD_PAM::symbols [protected]

A vector containing the modulation symbols.

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The documentation for this class was generated from the following files:

• comm/modulator.h
• comm/modulator.cpp

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