Overcoming time-varying co-channel interference using type-2 fuzzy adaptive filters

Author

Liang, Qilian ; Mendel, Jerry M.

Author_Institution

Dept. of Electr. Eng. Syst., Univ. of Southern California, Los Angeles, CA, USA

Volume

47

Issue

12

fYear

2000

fDate

12/1/2000 12:00:00 AM

Firstpage

1419

Lastpage

1428

Abstract

This paper presents a method for overcoming time-varying co-channel interference (CCI) using type-2 fuzzy adaptive filters (FAF). The type-2 FAF is realized using an unnormalized type-2 Takagi-Sugeno-Kang fuzzy logic system. A clustering method is used to adaptively design the parameters of the FAF. We use transversal equalizer and decision feedback equalizer structures to eliminate the CCI. Simulation results show that the equalizers based on type-2 FAFs perform better than the nearest neighbor classifiers or the equalizers based on type-1 FAFs when the number of co-channels is much large than 1

Keywords

adaptive filters; cellular radio; cochannel interference; decision feedback equalisers; fuzzy logic; time-varying channels; clustering method; co-channel number; decision feedback equalizer; simulation results; time-varying co-channel interference; transversal equalizer; type-2 fuzzy adaptive filters; unnormalized type-2 Takagi-Sugeno-Kang fuzzy logic system; Adaptive filters; Decision feedback equalizers; Frequency; Fuzzy logic; Fuzzy sets; Interchannel interference; Radio link; Radiofrequency interference; Signal processing; Time-varying channels;

fLanguage

English

Journal_Title

Circuits and Systems II: Analog and Digital Signal Processing, IEEE Transactions on

Publisher

ieee

ISSN

1057-7130

Type

jour

DOI

10.1109/82.899635

Filename

899635