Input of CRC when the input is random in matlab

Question

I have this code for CRC code in MATLAB, msg is the data and poly is the generator function.

msg=[1 0 1 1 0 0 1 0 1 ]; 
poly=[1 0 1 1]; 
[M, N]=size(poly);
mseg=[msg zeros(1,N-1)];
[q, r]=deconv(mseg,poly);
r=abs(r); 
for i=1:length(r)
        a=r(i);
        if ( mod(a,2)== 0 )
            r(i)=0;
        else
            r(i)=1;
        end end

    crc=r(length(msg)+1:end) frame = bitor(mseg,r)

It works well but I want to do it for random msg with size of 7. I used this but it has error.

msg = randi([0, 1], 7,1);

The error is:

Error using horzcat Dimensions of matrices being concatenated are not consistent.

please help me with this problem.

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score 2 · Accepted Answer · edited Apr 13 '18 at 15:37

2

Have you tried: msg = randi([0, 1], 1, 7); ?

Notice the switching of the 7, 1 to 1, 7. Please see if this solves your problem.

edited Apr 13 '18 at 15:37

Alex Zavatone

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answered Apr 13 '18 at 14:32

farbiondriven

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Input of CRC when the input is random in matlab

1 Answers1