Adaptive beamforming of ESPAR antenna based on stochastic approximation theory

Author

Shishkov, Blagovest ; Ohira, Takashi

Author_Institution

ATR Adaptive Commun. Res. Labs., Kyoto, Japan

Volume

2

fYear

2001

fDate

3-6 Dec. 2001

Firstpage

597

Abstract

A novel approach based on stochastic approximation theory is devoted to adaptive beamforming of electronically steerable passive array radiator (ESPAR) antennas. Because of the low cost, the ESPAR antenna has only a single-port output. The proposed algorithm, by unconventional method, performs adaptive control of loaded reactances on the passive radiators and thus forming both beam and nulls. Our study and simulation results show that ESPAR antenna can effectively suppress interference and noise background and is attractive in modem wireless communications systems.

Keywords

adaptive antenna arrays; adaptive control; antenna radiation patterns; approximation theory; array signal processing; gradient methods; interference suppression; mobile antennas; stochastic processes; ESPAR antenna; adaptive beamforming; adaptive control; electronically steerable passive array radiator antennas; interference suppression; loaded reactances; noise background suppression; passive radiators; single-port output; stochastic approximation theory; stochastic gradient algorithm; wireless communications systems; Adaptive arrays; Adaptive control; Antenna arrays; Antenna theory; Approximation methods; Array signal processing; Background noise; Costs; Interference suppression; Stochastic processes;

fLanguage

English

Publisher

ieee

Conference_Titel

Microwave Conference, 2001. APMC 2001. 2001 Asia-Pacific

Conference_Location

Taipei, Taiwan

Print_ISBN

0-7803-7138-0

Type

conf

DOI

10.1109/APMC.2001.985444

Filename

985444