modulation.m

一些关于空时编码的编码解码仿真程序

function [output] = Modulation(input)

[K,D,N,G,N_t,N_r,L,C]= header;
power_d = 1;
len = length(input);


for k = 1:len/2,
	tp = 2*input(1,2*k-1)+ 1*input(1,2*k);
	if tp ==0,
		%1+j
		output(k) = sqrt(power_d)* exp(-j*pi*3/4);
	elseif tp == 1,
% 		1-j
		output(k) = sqrt(power_d)* exp(j*pi*3/4);
	elseif tp == 2,
% 		-1+j
		output(k) = sqrt(power_d)* exp(-j*pi/4);
	elseif tp == 3,
% 		-1-j
		output(k) = sqrt(power_d)* exp(j*pi/4);
	else
		warning('message:modulation error');
	end
end