关鹃,,
马靖怡,
王光宇
重庆邮电大学移动通信技术重点实验室 ??重庆 ??400065
基金项目:国家科技重大专项(2016ZX03001010)，重庆市教委科学技术研究项目(KJ1500435)
详细信息
作者简介:庄陵：女，1978年生，副教授，博士，研究方向为移动通信数字信号处理
关鹃：女，1991年生，硕士生，研究方向为滤波器组系统原型滤波器优化
马靖怡：女，1993年生，硕士生，研究方向为数字信号处理、数字滤波器结构设计
王光宇：男，1964年生，教授，博士，研究方向为高速信号处理、多速率滤波器组理论
通讯作者:关鹃 guan_juan@163.com
中图分类号:TN911.72; TN713计量
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被引次数:0
出版历程
收稿日期:2018-05-21
修回日期:2018-10-12
网络出版日期:2018-11-15
刊出日期:2019-04-01
An Improvement Project of Roundoff Noise Performance of FIR Filters Based on Structure Optimization
Ling ZHUANG,Juan GUAN,,
Jingyi MA,
Guangyu WANG
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)
摘要
摘要:针对滤波器组系统硬件实现时原型滤波器的有限字长效应问题，该文研究如何改善FIR原型滤波器由信号量化引起的舍入噪声，即降低舍入噪声增益，提出一种FIR滤波器优化结构。通过分析舍入噪声来源，利用多项式参数化方法对舍入噪声增益表达式进行推导。仿真实例证明，在不同字长约束条件下所提结构滤波器的幅频相频响应与理想状态基本吻合；通过与现有算法对比，所提结构具有较小的舍入噪声增益。
关键词:FIR滤波器/
有限字长/
舍入噪声增益
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.
Key words:FIR filter/
Finite word length/
Roundoff noise gain
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