Improving the time domain response of fractional order digital differentiators by windowing

被引：2
|
作者：
Peng, Chengyan [1 ]
Ma, Xiaochuan [1 ]
Lin, Geping [1 ]
Wang, Min [1 ]
机构：
[1] Chinese Acad Sci, Inst Acoust, State Key Lab Acoust, Beijing 100190, Peoples R China
来源：
SIGNAL PROCESSING | 2015年 / 107卷
关键词：
Fractional order differentiator; Non-bandlimited signals; Spectrum leakage; Window; INTEGRATORS; DERIVATIVES; SYSTEMS; FILTERS;
D O I：
10.1016/j.sigpro.2014.03.034
中图分类号：
TM [电工技术]; TN [电子技术、通信技术];
学科分类号：
0808 ; 0809 ;
摘要：
In this paper, the limitation of using (j omega)(nu) as the ideal frequency response of fractional order digital differentiators for non-bandlimited signals is discussed. High frequency error enhanced by (j omega)(nu), along with the cause of time domain response degradation, is presented. Windows are proposed, which can help to improve the time domain response of fractional order digital differentiator and greatly reduce the filter order if the differentiator is approximated by finite impulse response (FIR) filter. Simulation results show that windowing the output of fractional order digital differentiator in frequency domain is effective in improving the time domain response of signals. (C) 2014 Elsevier B.V. All rights reserved.
引用
收藏
页码：282 / 289
页数：8
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