A study on reactively steered adaptive array in OFDM systems

Author

Nakayai, Y. ; Toda, T. ; Hara, S. ; Oishi, Y.

Author_Institution

Fujitsu Labs. Ltd, Yokosuka, Japan

Volume

2

fYear

2003

fDate

22-27 June 2003

Firstpage

851

Abstract

We propose it new scheme to introduce the REactively Steered Adaptive Array (RESAA) technique into an orthogonal frequency-division multiplexing (OFDM) system. taking advantage of the OFDM-transmission-data-frame format characteristics. Using computer simulation, we evaluate the performance of the proposed RESAA system in suppressing a signal with a delay time exceeding the guard interval as interference under the IEEE802.11a system format. The results show that the proposed scheme provides a significantly faster convergence and a better output signal-to-interference ratio (SIR) compared to the conventional scheme.

Keywords

OFDM modulation; adaptive antenna arrays; beam steering; convergence of numerical methods; gradient methods; recursive functions; wireless LAN; IEEE802.11a system; OFDM systems; computer simulation; descent algorithm; faster convergence; next-generation wireless communication; output signal-to-interference ratio; reactively steered adaptive array; recursive relation; signal model; transmission-data-frame format; virtual subcarriers; Adaptive arrays; Antenna arrays; Convergence; Delay effects; Energy consumption; Intersymbol interference; Laboratories; OFDM; Signal processing; Wireless communication;

fLanguage

English

Publisher

ieee

Conference_Titel

Antennas and Propagation Society International Symposium, 2003. IEEE

Conference_Location

Columbus, OH, USA

Print_ISBN

0-7803-7846-6

Type

conf

DOI

10.1109/APS.2003.1219368

Filename

1219368