Simplified method of designing FIR filter with controllable center frequency

Xiangdong Huang; Jinghui Chu; Wei Lü; Haitao Cui; Zhaohua Wang

doi:10.1007/s12209-010-1154-3

Transactions of Tianjin University ›› 2010, Vol. 16 ›› Issue (4) : 262 -266. DOI: 10.1007/s12209-010-1154-3

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Simplified method of designing FIR filter with controllable center frequency

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Abstract

A novel simplified method is presented to design FIR filter with controllable center frequency. The properties of transfer curves for all-phase filters are illustrated under 3 windowing conditions. By combining single-window all-phase filter design steps and double phase-shift combination, a series of design formulas for point-pass filter, notch filter, band-pass filter and band-stop filter are derived, thus the design computation complexity is greatly reduced. Experiments prove that the center frequency of all the filters can be accurately specified at arbitrary position by adjusting frequency parameters m and λ.

Keywords

filter design / all-phase / double phase-shift combination / center frequency

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Xiangdong Huang, Jinghui Chu, Wei Lü, Haitao Cui, Zhaohua Wang. Simplified method of designing FIR filter with controllable center frequency. Transactions of Tianjin University, 2010, 16(4): 262-266 DOI:10.1007/s12209-010-1154-3

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