EQBER_SIGGEN - Generate a noisy, channel-filtered signal to be equalized

This script generates a noisy, channel-filtered signal to be processed by a linear equalizer, a DFE equalizer, and an MLSE equalizer. The channel state information is retained between blocks of signal data. The script also sets the state of the data and noise generators for its first run, then allows the states to update automatically.

% Generate a PSK signal
if (firstRun)
    msg = randint(nBits, 1, M, dataState);
else
    msg = randint(nBits, 1, M);
end
txSig = pskmod(msg, M);

% Pass the signal through the channel
[filtSig, chanState] = filter(chnl, 1, txSig, chanState);

% Add AWGN to the signal
SNR = EbNo(EbNoIdx) + 10*log10(Rb/Fs);
if (firstRun)
    noisySig = awgn(filtSig, SNR, 'measured', noiseState);
    firstRun = false;
else
    noisySig = awgn(filtSig, SNR, 'measured');
end

Copyright 1996-2004 The MathWorks, Inc.
Published with MATLAB® 7.0