Maximum variable size allowed by the program is exceeded.

I am performing ML detection for 4x4 MIMO with 64 QAM modulation. To perform ML, I need to generate the entire symbolset of 4x4 64QAM. I used the following lines of code, which generated the error "Maximum variable size allowed by the program is exceeded."

allBits  = de2bi(0:2^(modOrd*N)-1, 'left-msb')';

Here modOrd = 6 (2^6 = 64) and N = 4.

The following error occurs here :

Maximum variable size allowed by the program is exceeded.

Error in de2bi (line 173)

b = zeros(len_d, n);

Error in algo3 (line 29) allBits = de2bi(0:2^(modOrd*N)-1, 'left-msb')';

I need to generate all Tx'ed signals from 'allBits' as given below

allTxSig = reshape(step(hMod, allBits(:)), N, 2^(modOrd*N));

Pls. suggest a workaround.

Thanks

Answer 1

[Roger Stafford]

Perhaps matlab is objecting to a matrix with 2^26 = 67,108,864 elements. That's a very large matrix.

[varun]

Any solution to this?