?? p417-example04.m
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% MATLAB script for Illustrative Problem 4, Chapter 9.
echo on
Lc=20; % Number of chips per bit
A1=3; % amplitude of the first sinusoidal interference
A2=7; % amplitude of the second sinusoidal interference
A3=12; % amplitude of the third sinusoidal interference
A4=0; % fourth case: no interference
w0=1; % frequency of the sinusoidal interference in radians
SNRindB=0:2:30;
for i=1:length(SNRindB),
% measured error rates
smld_err_prb1(i)=ss_Pe94(SNRindB(i),Lc,A1,w0);
smld_err_prb2(i)=ss_Pe94(SNRindB(i),Lc,A2,w0);
smld_err_prb3(i)=ss_Pe94(SNRindB(i),Lc,A3,w0);
echo off ;
end;
echo on ;
SNRindB4=0:1:8;
for i=1:length(SNRindB4),
% measured error rate when there is no interference
smld_err_prb4(i)=ss_Pe94(SNRindB4(i),Lc,A4,w0);
echo off ;
end;
echo on ;
% Plotting commands follow
semilogy(SNRindB,smld_err_prb1,'*');
hold
semilogy(SNRindB,smld_err_prb2,'o');
semilogy(SNRindB,smld_err_prb3,'o');
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