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The anti-symmetric condition with M even is not used in the design of which of the following linear-phase FIR filter?

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The anti-symmetric condition with M even is not used in the design of which of the following linear-phase FIR filter?

(a) Low pass

(b) High pass

(c) Band pass

(d) Bans stop

The question was posed to me during an interview.

This key question is from Design of FIR Filters in chapter Digital Filters Design of Digital Signal Processing

1 Answer

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Best answer
The correct answer is (a) Low pass

Explanation: When h(n)=-h(M-1-n) and M is even, we know that H(0)=0. Thus it is not used in the design of a low pass linear phase FIR filter.

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