channel.m

对Vblast—oFdm系统地仿真

function re_symbol= channel(H, tr_symbol,sig2,last_symbol,Nr,Nt,pdp);

% 把发送数据符号排成一列向量，每个发送天线的发送符号各占连续的一段
% 每个发送天线发送符号所占一段的长度为frame_length+length(pdp)-1
% 认为加入CP后可完全ISI，每行的开始补上个号的length(pdp)-1

clear j;
frame_length=size(tr_symbol,2);

tr_symbol=[last_symbol tr_symbol];

noise=sqrt(sig2)*1/sqrt(2)*(randn(Nr*frame_length,1) + j*randn(Nr*frame_length,1));
    
tr_symbol=tr_symbol.';

tr_symbol=reshape(tr_symbol,Nt*(frame_length+length(pdp)-1),1);

re_symbol1=H*tr_symbol+noise;
re_symbol=reshape(re_symbol1,frame_length,Nr).';