A Sequential Partial Optimization Algorithm for Design of Near Linear-Phase IIR Digital Differentiators

• 作者: LAI Xiaoping MENG Hailong YI Huoping
• 来源期刊: 中国电子杂志（英文版）
• 年，卷（期）: 2019,（5）
• 页码范围: 968-977
• 页数: 10页
• 语种: 英文
• DOI: 10.1049/cje.2019.06.017

摘要

The linear phase is a major characteristic of digital differentiators in many signal processing applications.This study presents a sequential partial optimization method for designing a fullband infinite impulse response digital differentiator with a near linear phase.To achieve a near linear phase,the group delay is treated as an optimization variable,and the maximum phase error is minimized within a constrained domain.During each iteration of the algorithm,in addition to the whole numerator and group delay,only one second-order denominator factor is optimized.The necessary and sufficient stability triangles are applied to insure the stability of the differentiators,and the Gauss-Newton strategy is used to handle the nonconvexity of the design problems.Design examples show that the proposed method outperforms several state-of-the-art methods in terms of the maximum phase deviation from the desired linear phase.

作者信息

序号	姓名	单位	发文数	被引次数	H指数	G指数
1	MENG Hailong		1	0	0.0	0.0
2	LAI Xiaoping		1	0	0.0	0.0
3	YI Huoping		1	0	0.0	0.0