%% 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.%   Copyright 1996-2004 The MathWorks, Inc.%   $Revision: 1.1.4.1 $  $Date: 2004/06/30 23:03:11 $% Generate a PSK signalif (firstRun)    msg = randint(nBits, 1, M, dataState);else    msg = randint(nBits, 1, M);endtxSig = pskmod(msg, M);% Pass the signal through the channel[filtSig, chanState] = filter(chnl, 1, txSig, chanState);% Add AWGN to the signalSNR = EbNo(EbNoIdx) + 10*log10(Rb/Fs);if (firstRun)    noisySig = awgn(filtSig, SNR, 'measured', noiseState);    firstRun = false;else    noisySig = awgn(filtSig, SNR, 'measured');end