www.gusucode.com > 基于matlab的GUI界面的语音信号端点标定源码程序 > 基于VBLAST-OFDM的MATLAB SIMULATION，图形化界面，并且给出了各仿真图/vblast-ofdm simulation/Q.m

    function [a]=Q(rx_symbol,modulation)


if ~isempty(findstr(modulation, 'BPSK'))
%BPSK
a = real(rx_symbol); 
elseif ~isempty(findstr(modulation, 'QPSK'))
% QPSK
soft_bits = zeros(2*size(rx_symbol,1),size(rx_symbol,2));

bit0 = real(rx_symbol); 
bit1 = imag(rx_symbol);

soft_bits(1:2:size(soft_bits, 1),:) = bit0;
soft_bits(2:2:size(soft_bits, 1),:) = bit1;

a=bit0+j*bit1;

end