channel.m

汪裕民的OFDM关键技术与应用中仿真MIMO-OFDM的源代码

function y = channel(sig2,Mt,Mr,x,H,N);
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%   将信道作用于OFDM帧
%   输入：
%       sig2    噪声
%       Mt      发射天线数
%       Mr      接收天线数
%       x       复数形式的输入信号
%       H       频率选择性信道
%   输出：
%       y       信道输出
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%   产生噪声序列（行代表不同天线，列代表时间）噪声是空间时间独立的高斯白噪声
noise = sqrt(sig2)*1/sqrt(2)*(randn(Mt*N,1)+j*randn(Mt*N,1));

y = H*x+noise;