我想在AWGN中使用RS（240.224）对QPSK进行BER估计，如paper所示。因此，我从类似MATLAB示例的东西开始，我只是做了如下参数更改：

rng(1993);     % Seed random number generator for repeatable results
M = 4;         % Modulation order
bps = log2(M); % Bits per symbol
N = 240;         % RS codeword length
K = 224;         % RS message length
rsEncoder = comm.RSEncoder( ...
    BitInput=true, ...
    CodewordLength=N, ...
    MessageLength=K);
rsDecoder = comm.RSDecoder( ...
    BitInput=true, ...
    CodewordLength=N, ...
    MessageLength=K);
ebnoVec = (3:0.5:8)';
ebnoVecCodingGain = ...
    ebnoVec + 10*log10(K/N); % Account for RS coding gain
errorStats = zeros(length(ebnoVec),3);

for i = 1:length(ebnoVec)
    awgnChannel.EbNo = ebnoVecCodingGain(i);
    reset(errorRate)
    while errorStats(i,2) < 100 && errorStats(i,3) < 1e7
        data = randi([0 1],1500,1);
        encData = rsEncoder(data);
        modData = pskmod(encData,M,InputType='bit');
        rxSig = awgnChannel(modData);
        rxData = pskdemod(rxSig,M,OutputType='bit');
        decData = rsDecoder(rxData);
        errorStats(i,:) = errorRate(data,decData);
    end
end

berCurveFit = berfit(ebnoVecCodingGain,errorStats(:,1));

semilogy(ebnoVecCodingGain,errorStats(:,1),'b*', ...
    ebnoVecCodingGain,berCurveFit,'c-')
ylabel('BER')
xlabel('Eb/No (dB)')
legend('RS coded BER','Curve Fit')
grid

我不断得到这个错误：

Error using comm.RSEncoder/setupImpl
the dimensions of the Input X must be consistent with the BitInput property value, the message and Codeword lengths, and primitive polynomial. ...