What is the frequency response of a system with input h(n) and window – McqOptions

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1.	What is the frequency response of a system with input h(n) and window length of M?
A.	( sum_{n=0}^{M-1} h(n)e^{j n} )
B.	( sum_{n=0}^{M} h(n)e^{j n} )
C.	( sum_{n=0}^M h(n)e^{-j n} )
D.	( sum_{n=0}^{M-1} h(n)e^{-j n} )
Answer» E.

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