Please answer in as much detail as possible. Thank you. Question 4 Match the exp

Question

Please answer in as much detail as possible. Thank you.

Question 4 Match the expression to the frequency parameter description Where: fis the frequency in Hz . fs is the sampling frequency in Hz .N is the number of points in the DFT or frequency response O is the discrete time normalized frequency used in Matlab in pi rads/sample W is the discrete-time normalized frequency as described in the textbook. Repetition Interval (Aliasing) ( XT rads /sample ) Discrete-time normalized frequency is 1.? 2. 1 Frequency Variable 3. 2 ( XT rads /sample ) 4. 2 Wrapped frequency axis range is between _ 5 2 (xT rads/sample) fs

Explanation / Answer

1.

Repition interval(Aliasing)=(2f/fs)

because in aliasing we deal with two frequencies

2.

Discrete normalized frequency=(2/N)

Since Normalized frequency is a unit of measurement of frequency equivalent to cycles/sample

3.

       2

Frequency variable = (2)*pi rad/sample

4.

       1

Frequency range axis should be in between +pi to -pi. Then only the frequency variable will become 2*pi

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