despreading.m

这是一个TD-SCDMA系统的RAKE接收模型

function ts=deSpreading( chip ,id)   

    global sys_consts;
    
    ts=zeros(1,44);
    for i = 1:sys_consts.Lh
        if sys_consts.h(i) ~= 0
            temp = zeros(1,704);
            temp(1:352) = chip(i:352+i-1);
            temp(353:704) = chip(497+i-1:848+i-1);
            z = ones(44, 1)*scramble.*(ones(44, 1)*ovsf(id))*reshape(temp,16,44);
            x = reshape(diag(z)/16,1,44);
            ts = ts+x;
        end
    end
    
return;


 %Lm = length(ovsf(id));
    %pn = scramble.*ovsf(id);
    %for i = 1:22
    %    for j = 1:sys_consts.Lh
    %        ts(i) = ts(i) + sum(chip((i-1)*16+j:(i-1)*16+Lm+j-1).*pn);
    %    end
    %end
    %for i = 23:44
    %    for j = 1:sys_consts.Lh
    %        ts(i) = ts(i) + sum(chip(144+(i-1)*16+j:144+(i-1)*16+Lm+j-1).*pn);
    %    end
    %end
    
    %ts = ts/Lm;