Hyperstable adaptation of "resonator-in-loop" line enhancer

Author

Krishna, V.V. ; Hiremath, Channamallesh G.

Author_Institution

ZSP Corp., Santa Clara, CA, USA

Volume

1

fYear

1998

fDate

1-4 Nov. 1998

Firstpage

513

Abstract

One of the different adaptation strategies employed with the resonator-in-loop (RIL) adaptive line enhancer (ALE) relies on "hyperstability" aimed at fast tracking of time varying sinusoids in MFSK and frequency-hop communications. We examine the bias associated with frequency estimation for the case of a single sinusoid in noise. The extent of bias is both SNR and frequency dependent. This is seen to be solely a limitation of the hyperstable adaptation method rather than the RIL ALE itself.

Keywords

adaptive filters; circuit stability; filtering theory; frequency estimation; frequency hop communication; frequency shift keying; noise; notch filters; resonator filters; tracking; MFSK; SNR; adaptive IIR filter; adaptive line enhancer; adaptive notch filter; bias; fast tracking; frequency estimation; frequency-hop communications; hyperstability; hyperstable adaptation method; resonator-in-loop line enhancer; time varying sinusoids; Adaptive filters; Convergence; Filtering; Finite impulse response filter; Frequency dependence; Frequency estimation; IIR filters; Line enhancers; Signal to noise ratio; White noise;

fLanguage

English

Publisher

ieee

Conference_Titel

Signals, Systems & Computers, 1998. Conference Record of the Thirty-Second Asilomar Conference on

Conference_Location

Pacific Grove, CA, USA

ISSN

1058-6393

Print_ISBN

0-7803-5148-7

Type

conf

DOI

10.1109/ACSSC.1998.750916

Filename

750916