awgn_channel.m

TD中扩频的链路级仿真 通过MATLAB实现

%AWGN信道

function [AWGN_Signal]=AWGN_Channel(Send_Signal,Eb_N0);  %Eb/N0 in dB
s=Send_Signal;
n=length(s);            %收到的比特数
eb_n0=10^(Eb_N0/10);
Eb=1;	
n0=Eb/eb_n0;%信道的噪声谱密度 
noise=zeros(1,n);
x=randn(1,n)*n0;
noise=(x+i*x)/sqrt(2);             %加复的噪声
AWGN_Signal=s+noise;