qpskdemod.m

Single/Multipath Channel Model Verificaiton EbNo vs. BER/SER under AWGN BPSK vs. QPSK Theory vs.

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% File Name: qpskdemod.m
% Function: Demodulation for QPSK
% Author: 
% Date: 2008.11.27
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

function [demodata]=qpskdemod(idata,qdata,nd,ml)

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% variables %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% idata :input Ich data
% qdata :input Qch data
% nd : Number of data
% ml : Number of modulation levels
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

demodata=zeros(1,ml*nd);
demodata(1,(1:ml:ml*nd-1))=idata(1,(1:nd))>=0;
demodata(1,(2:ml:ml*nd))=qdata(1,(1:nd))>=0;

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% end %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%