spreading.m

802.15 dsss 物理协议层方针代码

function sp=spreading(data,sp_code)
% sp_code - the spreading code with length 24, 12, 6, 4, 3, 2 or 1
spl=length(sp_code);
for i=1:length(data)
    if data(i)==0
    sp((i-1)*spl+1:(i*spl))=-1;
    else
    sp((i-1)*spl+1:(i*spl))=1  ;
    end
    sp((i-1)*spl+1:(i*spl))=sp((i-1)*spl+1:(i*spl)).*sp_code;
end