what does if(s(j+1)==y1(j+1)) mean?
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%Demodulation process
for i=1:6
for j=(i-1)*100:i*100
if(s(j+1)==y1(j+1))
x(j+1)=1;
else
x(j+1)=0;
end
end
end
%plot ASK Demodulated Signal
subplot(4,1,4);
plot(
t,x,'r');
title('ASK Demodulated Signal');
xlabel('time(s)');
ylabel('amplitude');
回答(1 个)
SaiDileep Kola
2021-1-15
Ask modulation is simply multiplying data sequence(0,1) with a continuous wave, so you get signal at places of 1's and get no signal at 0's, the reverse is done at demodulation to check if the signal is present and assign as 1 and others as 0.
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