www.gusucode.com > 基于matlab的GUI界面的语音信号端点标定源码程序 > 基于VBLAST-OFDM的MATLAB SIMULATION，图形化界面，并且给出了各仿真图/vblast-ofdm simulation/LoadSimConsts.m

    function SimulationConstants = LoadSimConsts(SimulationParameters)

global SimulationConstants;

fft_length=SimulationParameters.FFTPoints;

NumDataSubc=SimulationParameters.DataCarriers;
%if there is a zeropad option
if SimulationParameters.ZeroPad==1
    if NumDataSubc<16
        errordlg('Number of packets cannot be less than 10','Invalid input', 'modal');
    else
% make even # of carriers
    if rem(NumDataSubc,2) ~= 0
        NumDataSubc=NumDataSubc-1;
    end
    numdatasubc=NumDataSubc;
    end
else
    numdatasubc=SimulationParameters.FFTPoints;
end

%if there is a zeropad option
if SimulationParameters.ZeroPad
    long_tr_symbols=sign(randn(1,sum(numdatasubc)));
else
    switch (fft_length)
        case 64
            long_tr_symbols=sign(randn(1,64));
        case 128
            long_tr_symbols=sign(randn(1,128));
        case 256
            long_tr_symbols=sign(randn(1,256));
        case 512
            long_tr_symbols=sign(randn(1,512));
    end
end



SimulationConstants = struct('SamplingFrequency' , 20e6, ...
    'ConvCodeGenPoly', [1 0 1 1 0 1 1;1 1 1 1 0 0 1 ], ...
    'NumDataSubc',numdatasubc, ...
    'LongTrainingSymbols',long_tr_symbols);