具有系数相关性的可变分数时延滤波器设计方法
Method for the design of variable fractional delay filters with coefficient-dependence relation
庄陵 1刘莹 2宋诗苇2
作者信息
- 1. 重庆邮电大学通信与信息工程学院,重庆 400065;移动通信教育部工程研究中心,重庆 400065;移动通信技术重庆市重点实验室,重庆 400065
- 2. 重庆邮电大学通信与信息工程学院,重庆 400065
- 折叠
摘要
针对可变分数时延滤波器设计中的复杂度问题提出一种设计方法,将时域插值与泰勒级数展开相结合对Farrow结构进行系数配置,推导出相应的滤波器系数相关公式.该方法设计出的滤波器具有系数相关性,可使近一半滤波器系数独立,并得到低复杂度的滤波器实现结构.从复杂度、幅频响应及群时延、误差方面进行理论推导和仿真验证,分析结果表明,所提方法能有效降低可变分数时延滤波器的复杂度和计算成本.
Abstract
Aiming at the complexity problem in the design of variable fractional delay filters,a design method was con-sidered.Time-domain interpolation and Taylor series expansion were integrated to configure the coefficient of Farrow structure,and the corresponding filter related formula was derived.The designed filter had coefficient-dependence rela-tion,nearly half of the filter coefficients were independent,and an implemented structure of low-complexity filter was obtained.Theoretical derivation and simulation verification were conducted from the aspects of complexity,magnitude response,group delay,and error.The analysis shows that the proposed method can effectively reduce the complexity and computational cost of variable fractional delay filters.
关键词
可变分数时延滤波器/时域插值/系数相关性/复杂度Key words
variable fractional delay filter/time-domain interpolation/coefficient-dependence relation/complexity引用本文复制引用
基金项目
重庆市教委科学技术研究计划(KJQN202200617)
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据