channel.m

THIS matlab code is STTD

% channel

function [Rx_1, Rx_2, Rx, h_1, h_2] = channel(Tx_1, Tx_2, L, bit_n, SNR)

% Tx_1 : transmitted data through the antenna 1
% Tx_2 : transmitted data through the antenna 2

% % variable in MIMO
Rx = zeros(L/bit_n, 2);
Rx_1 = zeros(L/bit_n, 1);
Rx_2 = zeros(L/bit_n, 1);
% 
% % channel 1甫 芭模 单捞磐
% % channel 2甫 芭模 单捞磐
h_1 = zeros(L/bit_n, 1);
h_2 = zeros(L/bit_n, 1);
h_1(1:2:end, 1) = (1/sqrt(2))*(randn((L/bit_n)/2,1) + j*randn((L/bit_n)/2,1));
h_1(2:2:end, 1) = h_1(1:2:end, 1);
h_2(1:2:end, 1) = (1/sqrt(2))*(randn((L/bit_n)/2,1) + j*randn((L/bit_n)/2,1));
h_2(2:2:end, 1) = h_2(1:2:end, 1);

% h_1 = ones(L/bit_n,1);
% h_2 = ones(L/bit_n,1);


Rx_1 = awgn(h_1.*Tx_1, SNR, 'measured'); 
Rx_2 = awgn(h_2.*Tx_2, SNR, 'measured'); 
Rx = [Rx_1 Rx_2];