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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.

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Authors and Affiliations

  1. School of Electronics and Information Engineering, Tianjin University, Tianjin, 300072, China

    Xiangdong Huang  (黄翔东), Jinghui Chu  (褚晶辉), Wei Lü  (吕 卫), Haitao Cui  (崔海涛) & Zhaohua Wang  (王兆华)

Authors
  1. Xiangdong Huang  (黄翔东)
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  2. Jinghui Chu  (褚晶辉)
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  3. Wei Lü  (吕 卫)
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  4. Haitao Cui  (崔海涛)
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  5. Zhaohua Wang  (王兆华)
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Corresponding author

Correspondence to Xiangdong Huang  (黄翔东).

Additional information

Supported by National Natural Science Foundation of China (No. 60802048) and New Teacher PhD Programs Foundation of Ministry of Education of China (No. 200700056105).

HUANG Xiangdong, born in 1979, male, Dr, associate Prof.

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Huang, X., Chu, J., Lü, W. et al. Simplified method of designing FIR filter with controllable center frequency. Trans. Tianjin Univ. 16, 262–266 (2010). https://doi.org/10.1007/s12209-010-1154-3

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  • DOI: https://doi.org/10.1007/s12209-010-1154-3

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