Adding convolutional coding in "LTE PHY Downlink with Spatial Multiplexing"

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sumit kumar 2013-8-1

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https://ww2.mathworks.cn/matlabcentral/answers/83785-adding-convolutional-coding-in-lte-phy-downlink-with-spatial-multiplexing

评论： hussain ali 2013-12-10

Ia m using MATLAB 2013a(64bit WIN7). In the matlab code for LTE PHY Downlink with Spatial Multiplexing, I tried to add a convolution coder decoder by putting first

    hConEnc = comm.ConvolutionalEncoder;
    hDec = comm.ViterbiDecoder('InputFormat','Hard');
    encodedData1 = step(hConEnc,scramOut1);
    encodedData2 = step(hConEnc,scramOut2);
    modOut1 = step(hMod, encodedData1);
    modOut2 = step(hMod, encodedData2);

At the demodulator side I did

    decodedData1 = step(hDec,demodOut_1);
    decodedData2 = step(hDec,demodOut_2);
    demodOut1 = step(hDemod, cwOut1, nVar1);
    demodOut2 = step(hDemod, cwOut2, nVar2);

But when I am running it. it throws following error

Subscripted assignment dimension mismatch.

Error in lteREMapper (line 165) tmp(dtIdx_subframe, :) = in;

Error in commExamplePrivate (line 128) [varargout{1:nargout}] = lteREMapper(varargin{2:end});

Error in dwnlink_LTE_ADEL (line 296) txGrid = commExamplePrivate('lteREMapper', preOut, csr, nS, ...

I tried digging the code of lteREMapper but no success so far.

What dimensions I need to change ?