despread_spectrum.m

程序对盲信号分离空时多用户检测器的仿真 但在程序中A用了随机矩阵

function rec_seq=despread_spectrum(seq_spread,pn_seq,len_seq,len_chip)
for m=1:4
    for i=1:len_seq
          n_start=len_chip*(i-1)+1;
          n_end=len_chip*i;
        for j=n_start:n_end;
            temp1=seq_spread(m,n_start:n_end);
            temp2=pn_seq(m,:);
            temp=temp1.*temp2;
            decision=sum(temp);
        if decision>0;
            rec_seq(m,i)=1;
        else
            rec_seq(m,i)=-1;
        end
      end
    end
end