PLL synchronized time-varying constrained notch filter for retrieving a weak multiple sine signal jammed by FM interference

Author

Wulich, Dov ; Plotkin, E.I. ; Swamy, M.N.S. ; Tong, Wen

Author_Institution

Dept. of Electr. & Comput. Eng., Concordia Univ., Montreal, Que.

Volume

40

Issue

11

fYear

1992

fDate

11/1/1992 12:00:00 AM

Firstpage

2866

Lastpage

2870

Abstract

A method of retrieval of a multitone corrupted by a strong wideband FM interference is presented. The input mixture is transformed into a new time domain, resulting in a concentration of the FM interference around a chosen frequency; this inference is then rejected by a constrained notch filter with a fixed notch point. The time warping is implemented through nonequally spaced sampling. The method provides results superior to those of conventional adaptive processing, which fails to track the parameters of an FM interference with significantly large frequency deviations

Keywords

interference suppression; notch filters; phase-locked loops; signal processing; synchronisation; time-varying networks; FM interference; PLL synchronised time-varying filter; constrained notch filter; interference rejection; jamming; multitone retrieval; nonequally spaced sampling; time domain; time warping; weak multiple sine signal; Entropy; Filters; Frequency; Interference; Kernel; Phase locked loops; Signal processing; Signal processing algorithms; Spectral analysis; Speech processing;

fLanguage

English

Journal_Title

Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1053-587X

Type

jour

DOI

10.1109/78.165683

Filename

165683