pr7_33.m

Spread Spectrum and CDMA Principles and Applications 书籍和代码

%Problem 7.33;
%calculation of squared distance between two group signals in a synchronous DS CDMA;

S=hadamard(8); S=S(1:8,:); %signature matrix, columns are signatures;
dgn=diag(S'*S); S=S*diag(1./sqrt(dgn)); %normalizing all signatures;
Ro=S'*S; %signature correlation matrix;
K=size(S,2); %number of users;
b=2*unidrnd(2,2,K)-3; %two random users bit patterns;
Eps=b(1,:)-b(2,:); %bit pattern difference vector;
dsq=Eps*Ro*Eps'; %squared distance according to (7.15);
fprintf('\n');
disp('squared distance');
disp(dsq);