ovsf_generator.m

wcdma下行扰码和OVSF码的matlab仿真程序

% ======OVSF generator=======
function [OVSF_Codes]=OVSF_Generator(Spread_Factor, Code_Number)
% Code_Number=-1 means generating all OVSF codes when SF=Spread_Factor
OVSF_Codes=1;
if Spread_Factor==1
return;
end
for i=1:1:log2(Spread_Factor)
    Temp=OVSF_Codes;
    for j=1:1:size(OVSF_Codes,1)
        if j==1
            OVSF_Codes=[Temp(j,:),Temp(j,:);Temp(j,:),(-1)*Temp(j,:)];
        else
            OVSF_Codes=[OVSF_Codes;Temp(j,:),Temp(j,:);Temp(j,:),(-1)*Temp(j,:)];
        end
    end
end
if Code_Number>-1
OVSF_Codes=OVSF_Codes((Code_Number+1),:);
end
end