qpskmod.asv

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

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% Function:
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function [iout,qout]=qpskmod(paradata,nd,ml)

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% variables %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% paradata : input data
% nd : number of data
% ml : number of modulation levels
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m2=ml./2;

paradata2=paradata.*2-1;
count2=0; %symbol

for jj=1:nd

	isi = zeros(1,1);
	isq = zeros(1,1);

	for ii = 1 : m2 
  		isi = isi + 2.^( m2 - ii ) .* paradata2(1,ii+count2);
  		isq = isq + 2.^( m2 - ii ) .* paradata2(1,m2+ii+count2);
	end

	iout((1:para),jj)=isi;
	qout((1:para),jj)=isq;

	count2=count2+ml;

end

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