MATLAB PROGRAM FOR Delta Modulation Sine Wave

 Delta Modulation Sine Wave

 The operation of a delta modulator is to periodically sample the input message, to make a comparison of the current sample with that preceding it, and to output a single bit which indicates the sign of the difference between the two samples.

Matlab program for Delta Modulation

subplot(212)

hold on

m1=sin(2*pi*t)

plot(m1,'black')

title('sin wave')

xlabel('time')

ylabel('amplitude')

d=2*pi/100

for n=1:1:100

    if n==1

        e1(n)=m1(n)

        eq1(n)=d*sign(e1(n))

        mq1(n)=eq1(n)

    else

        e1(n)=m1(n)-mq1(n-1)

        eq1(n)=d*sign(e1(n))

        mq1(n)=mq1(n-1)+eq1(n)

    end

end

stairs(mq1,'black')

hleg=legend('original signal','stair case approximated signal')

hold off