multipath_channel.m

OFDM系统的仿真代码MATLAB环境下

% Two_path Rayleigh Channel
function [b1, b2, b3, b4] = maltipath_channel

global sim_consts;

N = 10000;
if ~isempty(findstr(sim_consts.ChannelModel, 'Slow-variable'))  % Slow-variable channel
   p = 0.99;
elseif ~isempty(findstr(sim_consts.ChannelModel, 'Fast-variable')) % Fast-variable channel
   p = 0.1;
end  

% The IIR filter is described by the vectors A and B 
A = [1 -2*p p^2];
B = (1-p)^2;

for i = 1:N
    [white_noise_seq1(i), white_noise_seq2(i), white_noise_seq3(i), white_noise_seq4(i)] = gngauss;
end;
b1 = filter(B,A,white_noise_seq1);
b2 = filter(B,A,white_noise_seq2);
b3 = filter(B,A,white_noise_seq3);
b4 = filter(B,A,white_noise_seq4);