Differential Phase Shift Keying (DPSK)

How to convert PSK coding to DPSK code

for i=1:6

for j=(i-1)*100:i*100

if(n(i)==1)

s(j+1)=y1(j+1);

else

s(j+1)=y2(j+1);

end

end

end

Answer 1

[Swetha Polemoni]

Hi AHMAD SAUFUDIN,Â

It is my understanding that you want to modulate your data using DPSK.

1. If you have your message data, feel free to use "dpskmod"Â inbulit matlab function.
2. If you have access to PSK modulated data, use "pskdemod" for demodulating it first and use dpskmod to get dpsk modulated data.
3. Else if you want to do it from scratch, look into the following code snippet

N=10;
x=randi(2,N,1)-1;
delaybit=1;
y=zeros(N,1);
for i=1:N
    y(i)=~xor(x(i),delaybit);
    delaybit=y(i);
end

Further you can multiply carrier to y to get DPSK.