inputfcn1.m

用BP神经网络实现的第三代移动通信CDMA多用户检测算法

function [filterout,truedata]=inputfcn1(snr_in_dB,Rx,usernum,tempdata,dataleg)
%snr=10^(snr_in_dB/10);
snr=10.^(snr_in_dB/10);
sgma=1;
%Eb=2*sgma^2*snr;  %达到SNR时的Eb
%E_chip=Eb/Lc;
Eb=2*sgma^2*snr;
mag=sqrt(Eb);
datanum=dataleg;
truedata=tempdata;
noise=randn(4,datanum);
magmatx=[mag(1,1) 0 0 0;
   0 mag(2,1) 0 0;
   0 0 mag(3,1) 0;
   0 0 0 mag(4,1)];
filterout=Rx*magmatx*truedata+noise;
for i=1:datanum
   for j=1:usernum
     filterout(j,i)=filterout(j,i)/max(abs(filterout(:,i)));
   end
end