goldcodegenerator.m

The program generates Gold Codes.

function [c1n_out_bipolar,c2n_out_bipolar]= GoldCodeGenerator(L)

n=25;
x=ones(1,n);
x_c2n=0;
y_c1n=0;
Length_max=(2^n)-1;

for i=1:L                                   % it should be equal to Length_max to generate all possible Gold codes
    y=dec2bin(i,n);
    for j=1:24576                           % Length_max
        c1n(i,j)=mod(x(25)+y(25),2);        % considering x(25) to be the LSB, or the bit associated to degree 0
        c2n(i,j)=mod(x_c2n+y_c1n,2);        % somehow inverting the ordering of the schema in IAS
        x=[mod(x(25)+x(22),2) x(1:n-1)];
        x_c2n=mod(x(7)+x(18)+x(21),2);
        y=[mod(y(25)+y(24)+y(23)+y(22),2) y(1:n-1)];
        y_c1n=mod(y(8)+y(19)+y(21),2);
    end
end

% for index=1:32
%     AutoCorrC1n=xcorr(c1n(index,:),c1n(index,:));
%     AutoCorrC2n=xcorr(c2n(index,:),c2n(index,:));
% end


c1n_out_bipolar(:,:)=2*c1n(:,:)-1;
c2n_out_bipolar(:,:)=2*c2n(:,:)-1;


% AutoCorrC1n_out=AutoCorrC1n;
% AutoCorrC2n_out=AutoCorrC2n;