Performance study on adaptive LMS filter to NBI rejection in CDMA signals

Author

Luo, Jingqing ; Davis, Curt ; Ho, Dominic

Author_Institution

Lab. of Electr. Eng. Inst., Anhui, China

Volume

1

fYear

2000

fDate

2000

Firstpage

193

Abstract

There are cases in the communication field that the wide band CDMA signals is interfered by some narrow band signals. For the CDMA communication is a kind of spread spectrum communication, the system itself has advantage of very less sensitive to such interference. However, when the strong narrow band interference (NBI) exists, the performance of the receiver will not be very good. Adaptive LMS filter can effectively rejects the narrow band interference from the wide band signals. We bring forward the study results of narrow band interference rejection by adaptive LMS filters, discuss the factors which effect the performance of the filters, introduce a new idea to the adaptive filters for this kind of problems for improving their performance

Keywords

adaptive filters; adaptive signal processing; code division multiple access; filtering theory; least mean squares methods; multiuser channels; radiofrequency interference; spread spectrum communication; NBI rejection; RFI; adaptive LMS filter; code division multiple access; narrow band interference rejection; narrow band signals; performance; radiofrequency interference; receiver; spread spectrum communication; wide band CDMA signals; wireless communication; Adaptive filters; Bandwidth; Interference; Least squares approximation; Multiaccess communication; Narrowband; Spread spectrum communication; USA Councils; Wideband; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing Proceedings, 2000. WCCC-ICSP 2000. 5th International Conference on

Conference_Location

Beijing

Print_ISBN

0-7803-5747-7

Type

conf

DOI

10.1109/ICOSP.2000.894473

Filename

894473