www.pudn.com > qpskmod&demod.rar > qpskdemod.m

%Program 3-10 
%qpskdemod.m 
%Function to perform QPSK demodulation 
function [demodata]=qpskdemod(idata,qdata,para,nd,ml) 
 
%*****************************variables****************************** 
%idata: input Ich data 
%qdata: input Qch data 
%demodata: demodulated data (para-by-nd matrix) 
%para: Number of parallel channels 
%nd: Number of data 
%m1: Number of modulation levels 
%(QPSK-2 16QAM-4) 
 
%******************************************************************** 
demodata=zeros(para,ml*nd); 
demodata((1:para),(1:ml:ml*nd-1))=idata((1:para),... 
    (1:nd))>=0; 
demodata((1:para),(2:ml:ml*nd))=qdata((1:para),... 
    (1:nd))>=0; 
 
%***************************end of file******************************