Circular Time Delay in signal, effect on phase spectra of DFT

1. What is circular shift in DFT?
2. What is circular time shift sequence?
3. How do you find the phase angle in DFT?

What is circular shift in DFT?

Circular Frequency Shift

The multiplication of the sequence xn with the complex exponential sequence ej2Πkn/N is equivalent to the circular shift of the DFT by L units in frequency.

What is circular time shift sequence?

Circular Time Shifting is very similar to regular, linear time shifting, except that as the items are shifted past a certain point, they are looped around to the other end of the sequence.

How do you find the phase angle in DFT?

Fs=1e3; t=linspace(0,1,Fs); f=1; x=sin(2*pi*f*t); X=fft(x); Xphase=angle(X); Xmag=abs(X);