A 2ND-ORDER HYPERSTABLE ADAPTIVE FILTER FOR FREQUENCY ESTIMATION

被引：7

作者：

PADMANABHAN, M ^{[1
]}

MARTIN, K ^{[1
]}

机构：

[1] UNIV CALIF LOS ANGELES, INTEGRATED CIRCUITS & SYST LAB, LOS ANGELES, CA 90024 USA

来源：

IEEE TRANSACTIONS ON CIRCUITS AND SYSTEMS II-EXPRESS BRIEFS | 1993年 / 40卷 / 06期

基金：

美国国家科学基金会;

关键词：

D O I：

10.1109/82.277892

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：

A second-order adaptive filter structure is proposed here that can be used for frequency estimation and enhancement of an input sinusoid. Unlike other gradient based adaptive line enhancement schemes, this filter has the advantage that it can be made to converge arbitrarily fast by increasing the step size of the update, while still retaining stability. This becomes possible because the adaptation strategy has its roots in hyperstability theory. A limitation of the scheme is that it gives a biased estimate in the presence of noise; however, some techniques are described here that bring the bias down to a low level.

引用

页码：398 / 403

页数：6

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