random_binary.m

仿真具有三条固定信道的AWGN多径信道的QPSK系统的BER性能

% File:random_binary.m 形成长度为nbits的二进制随机波形
function [x,bits] = random_binary(nbits,nsamples)
x = zeros(1,nbits*nsamples);
bits = round(rand(1,nbits));
for m = 1:nbits
    for n = 1:nsamples
        index = (m-1)*nsamples + n;
        x(1,index) = (-1)^bits(m);
    end
end