An Improvement Project of Roundoff Noise Performance of FIR Filters Based on Structure Optimization

Ling ZHUANG; Juan GUAN; Jingyi MA; Guangyu WANG

doi:10.11999/JEIT180480

Volume 41 Issue 4

Mar. 2019

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Ling ZHUANG, Juan GUAN, Jingyi MA, Guangyu WANG. An Improvement Project of Roundoff Noise Performance of FIR Filters Based on Structure Optimization[J]. Journal of Electronics & Information Technology, 2019, 41(4): 932-938. doi: 10.11999/JEIT180480

Citation:

Ling ZHUANG, Juan GUAN, Jingyi MA, Guangyu WANG. An Improvement Project of Roundoff Noise Performance of FIR Filters Based on Structure Optimization[J]. Journal of Electronics & Information Technology, 2019, 41(4): 932-938. doi: 10.11999/JEIT180480

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An Improvement Project of Roundoff Noise Performance of FIR Filters Based on Structure Optimization

doi: 10.11999/JEIT180480

Key Laboratory of Mobile Communications Technology, Chongqing University of Posts and Telecommunications, Chongqing 400065, China

Funds: The National Science and Technology Major Project (2016ZX03001010), The Scientific and Technological Research Program of Chongqing Municipal Education Commission (KJ1500435)

Received Date: 2018-05-21
Rev Recd Date: 2018-10-12

Available Online: 2018-11-15

Publish Date: 2019-04-01

Abstract

Abstract

For the problem of the finite word length effect of prototype filters in hardware implementation of the filter bank system, this paper studies how to improve the performance of roundoff noise caused by signal quantization for the FIR prototype filter, that is, to reduce the roundoff noise gain. An FIR filter optimization structure is proposed. By analyzing the source of roundoff noise, a polynomial parameterization method is used to derive the roundoff noise gain expression. The simulation example shows that the amplitude-frequency and phase-frequency response of the proposed structure filter are basically consistent with the ideal state under different constraint of word length. Compared with the existing algorithms, the proposed structure has a smaller roundoff noise gain.
- FIR filter,
- Finite word length,
- Roundoff noise gain

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References(15)

References

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