mc_spreading.m

mc-cdma matlab下的性能仿真

% spreading.m
%
% Function to perform spreading codes
%
% Programmed by SP.Feng
%

function [S]=mc_spreading(inputData,numUser,numData,cSpread,spreadLength)

%****************** variables *************************
% inputData : input data (numUser-by-numData matrix)
% numUser : Number of paralell users
% numData : Number of data
% spreadLength : length of spreading codes
% *****************************************************


% cSpread=[1 1 1 1 1 1 1 1;1 -1 1 -1 1 -1 1 -1;...
%         1 1 -1 -1 1 1 -1 -1;1 -1 -1 1 1 -1 -1 1;...
%         1 1 1 1 -1 -1 -1 -1;1 -1 1 -1 -1 1 -1 1;...
%         1 1 -1 -1 -1 -1 1 1;1 -1 -1 1 -1 1 1 -1];
S = zeros(numUser,numData*spreadLength);


for n=1:numData
    for k=1:spreadLength
        tempS(k) = cSpread(k)*inputData(:,n);
    end
        S(:,(n-1)*spreadLength+1:n*spreadLength) = tempS;
end