A smart time-frequency exciser for spread spectrum communications

Author

Tazebay, Mehmet V. ; Akansu, Ala N.

Author_Institution

Dept. of Electr. & Comput. Eng., New Jersey Inst. of Technol., Newark, NJ, USA

Volume

2

fYear

1995

fDate

9-12 May 1995

Firstpage

1209

Abstract

A smart adaptive time-frequency (ATF) excision algorithm is proposed to perform interference suppression in spread spectrum communications. The ATF exciser has the intelligence of deciding the domain of the excision. Additionally, adaptive subband transforms are utilized for frequency domain excision in order to track the spectral variations of the incoming signal. This adaptive transform approach brings significant performance improvements in spectral resolution. Bit error rate (EER) performance of the novel ATF exciser-based direct sequence spread spectrum (DSSS) system receiver is compared with other existing transform domain-based DSSS receivers. Time localized or frequency-localized interferer types and additive white Gaussian noise (AWGN) channels are considered in the study. In all cases, the smart ATF exciser-based DSSS receiver drastically outperforms the existing competitors. Its robust performance against the variations of the interferers is verified

Keywords

Gaussian channels; adaptive signal processing; error statistics; interference suppression; pseudonoise codes; receivers; signal resolution; spread spectrum communication; time-frequency analysis; tracking; transforms; ATF exciser; adaptive subband transforms; additive white Gaussian noise channels; bit error rate performance; direct sequence spread spectrum system receiver; frequency domain excision; frequency-localized interferer; interference suppression; smart adaptive time-frequency excision algorithm; smart time-frequency exciser; spectral resolution; spectral variations; spread spectrum communications; time localized interferer; Additive white noise; Bit error rate; Discrete Fourier transforms; Frequency domain analysis; Interference; Karhunen-Loeve transforms; Signal processing algorithms; Signal resolution; Spread spectrum communication; Time frequency analysis;

fLanguage

English

Publisher

ieee

Conference_Titel

Acoustics, Speech, and Signal Processing, 1995. ICASSP-95., 1995 International Conference on

Conference_Location

Detroit, MI

ISSN

1520-6149

Print_ISBN

0-7803-2431-5

Type

conf

DOI

10.1109/ICASSP.1995.480455

Filename

480455