kj

1. TASk1
clc
close all
clear all
xn=[1 0 0 1]
xk=fft(xn)
xk1=ifft(xk)
Output:-
xn=
1 0 0 1
xk=
2.0000 1.0000 + 1.0000i 0 1.0000 - 1.0000i
xk1 =
1 0 0 1
TASK2
clc
close all
clear all
xn=[1 0 0 1]
xk=fft(xn)
mag=abs(xk)
pha=angle(xk)
subplot(2,1,1)
plot(mag)
title('magnitude of signal')
xlabel('time')
ylabel('amplitude')

2. subplot(2,1,2)
plot(pha)
title('magnitude of signal')
xlabel('time')
ylabel('amplitude')
TASK3