A robust beamformer for OFDM based WLANs against burst interference

Author

Yu, Zhu Liang ; Yang, Fan ; Wee Ser ; Rahadja, Susanto

Author_Institution

Center for Signal Process., Nanyang Technol. Univ., Singapore

fYear

2003

fDate

27-29 Aug. 2003

Firstpage

133

Lastpage

136

Abstract

A beamformer for burst interference suppression is proposed for an orthogonal frequency-division multiplexing (OFDM) system with receiver diversity. The proposed beamformer is a generalized sidelobe canceller (GSC) with a modified blocking matrix. The modified GSC blocking matrix using channel estimation results is proposed to combat the fading channel effects. Moreover, the diagonal loading method is used to obtain a beamforming performance robust against system imperfections. The simulation results show that the proposed beamformer greatly improves the system performance when strong interference exists.

Keywords

OFDM modulation; channel estimation; diversity reception; fading channels; interference suppression; matrix algebra; radiofrequency interference; wireless LAN; OFDM; WLAN; burst interference suppression; channel estimation; cochannel interference; fading channel; generalized sidelobe canceller; interchannel interference; modified blocking matrix; orthogonal frequency-division multiplexing; receiver diversity; robust beamformer; Adaptive arrays; Antenna arrays; Digital video broadcasting; Interchannel interference; Interference cancellation; OFDM; Robustness; Signal processing; Switches; Wireless LAN;

fLanguage

English

Publisher

ieee

Conference_Titel

Signal Processing Systems, 2003. SIPS 2003. IEEE Workshop on

ISSN

1520-6130

Print_ISBN

0-7803-7795-8

Type

conf

DOI

10.1109/SIPS.2003.1235657

Filename

1235657