comb2.m

此程序为DS-CDMA链路中加入基于子空间的PASTd多用户检测方法。系统中采用m序列阔频

% Program 5-11
% comb2.m
% Function to add white gaussian noise.
% Programmed by yixiongshu.2006.8.9

function [iout,qout]=comb2(idata,qdata,attn)
% %
% % attn: attenuation level causedby ebno or C/N
% %
v=length(idata);
h=length(attn);

iout=zeros(h,v);
qout=zeros(h,v);
%**********************************************************
for ii=1:h
    iout(ii,:)=idata+randn(1,v)*attn(ii);
    qout(ii,:)=qdata+randn(1,v)*attn(ii);
end 
%end of file.

% %**********************************************************
% % for ii=1:user
% % iout(ii,:) = idata+normrnd(0,attn(ii),1,v);
% % qout(ii,:) = qdata+normrnd(0,attn(ii),1,v);
% % end
% 
% %**********************************************************
% for ii=1:user
% iout(ii,:)=awgn(idata,ebno,spow(ii));
% qout(ii,:)=awgn(qdata,ebno,spow(ii));
% end