awgn_noise.m

OFDM信道估计和均衡的仿真程序

%+----------------------------------------------------------------+
%|                                                                |
%|  Name: AWGN_noise.m                                            |
%|  Author: James Shen                                            |
%|  Description: Takes a signal and a SNR to output a noise       |
%|  sequence as a row vector.                                     |
%|                                                                |
%+----------------------------------------------------------------+

function[noise] = AWGN_noise(input, SNR);

% SNR = 10*log10(var(input)/var(noise))

noise = crand(1, length(input))*( var(input)/(10^(SNR/10)) );