Interference rejection in PN spread-spectrum systems with LS linear phase FIR filters

Author

Theodoridis, S. ; Kalouptsidis, N. ; Proakis, J. ; Koyas, G.

Author_Institution

Dept. of Comput. Eng., Patras Univ., Patra-Rio, Greece

Volume

37

Issue

9

fYear

1989

fDate

9/1/1989 12:00:00 AM

Firstpage

991

Lastpage

994

Abstract

The effects of a narrowband interference present in a pseudonoise (PN) spread-spectrum system can be minimized by using digital whitening techniques. A new efficient block LS algorithm for the design of an FIR filter with linear phase is derived and used as a whitening filter. Simulations are carried out to demonstrate the effectiveness of the LS optimum linear-phase filter in suppressing a narrowband interference in a PN spread-spectrum system. Comparisons to previously used methods are made. The simulations showed an improvement in the output SNR on the order of 4-5 dB over already existing schemes

Keywords

filtering and prediction theory; interference suppression; spread spectrum communication; LS linear phase FIR filters; digital whitening; interference rejection; narrowband interference; pseudonoise; spread-spectrum systems; whitening filter; Bandwidth; Filtering algorithms; Finite impulse response filter; Interference suppression; Matched filters; Narrowband; Nonlinear filters; Random sequences; Signal processing algorithms; Spread spectrum communication;

fLanguage

English

Journal_Title

Communications, IEEE Transactions on

Publisher

ieee

ISSN

0090-6778

Type

jour

DOI

10.1109/26.35382

Filename

35382