userseq_gen.asv

运用群操作进行多用户检测

function [user_seq max_corr] = userseq_gen(user_num);
N = 63;
goldseq = zeros(65,63);
for i = 1:65,
    goldseq(i,:) = goldseq_gen(i);
    goldseqbal(i) = sum(goldseq(i,:)*2-1);
end
goldseq_index = find(goldseqbal == 1);
goldseq_length = length(goldseq_index);

% 任意取12个
Nu = user_num;
user_seq = goldseq(goldseq_index(1:Nu),:);
user_seq = goldseq(goldseq_index(1:Nu),:);
max_c = 0;
for i = 1:Nu,
    for j = i+1:Nu,
        a = 2*user_seq(i,:)-1;b = 2*user_seq(j,:)-1;
        for p = 1:N,
            c = [a(1+p:N) a(1:p)];
            v(p) = c*b';
        end
        if (max(v)>max_c)
            max_c = max(v);
        end
    end
end
max_corr = max_c;