ch_noise.m

关于MIMO-OFDM的matlab和simulink仿真程序或模型（有OFDM的simulink仿真模型

% ch_noise (operate on recv)
% random noise defined by noise_level amplitude
if already_made_noise == 0	% only generate once and use for both QAM and OFDM
	noise = (rand(1,length(recv))-0.5)*2*noise_level;
	already_made_noise = 1;
end
recv = recv + noise;