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Which of the following is not a characteristic of FIR filter?(a) Many zeroes(b) Poles only at z=0(c) Transfer function is a polynomial of z-1(d) Many polesThe question was posed to me during an interview.My doubt stems from Equalization Techniques topic in chapter Equalization, Diversity and Channel Coding of Wireless/Mobile |
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Answer» RIGHT option is (d) Many poles Explanation: Finite IMPULSE response FILTER (FIR) has many zeroes but poles only at z=0. The transfer FUNCTION of the filter is a polynomial of z-1. It is also referred to as transversal filter. |
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