search_rnd.m

This a framework to test new ideas in transmission technology. Actual development is a LDPC-coder in

function [seq_best] = search_rnd( max_search, M, N, L );
% [seq] = search_rnd( max_search, M, N, L );
% tries out at maximum max_search random sequences and
% searches for the best in it...
% M is the number of sequences (antennas)
% N is the length of the sequences
% L is the length of the channel

if ( N - L + 1 ) < M * L
    disp( 'N - L + 1 < M * L  --> matrix will not be full rank!' );
    return;
end

tr_best = 10000000000000;
seq_best = [];
for ind = 1:max_search
    seq = get_rand_seq( M, N, L, 4 );
    S = seq_to_S( seq, L );
    
    t = abs( trace( inv( S' * S ) ) );
    if t < tr_best
        disp( 'found new best...' );
        disp( t );
        tr_best = t;
        seq_best = seq;
        save 'seq_best' seq_best;
%        seq_to_2( seq );
    end
end