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A Direction-of-Arrival Estimation Based Adaptive Beamforming Algorithm for OFDMA Smart Antenna Systems  

Yun, Young-Ho (한국항공대학교 항공전자 및 정보통신공학부)
Park, Yoon-Ok (한국전자통신연구원 이동통신연구단 패킷모뎀연구팀)
Park, Hyung-Rae (한국항공대학교 항공전자 및 정보통신공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.31, no.12A, 2006 , pp. 1214-1222 More about this Journal
Abstract
In this paper, an efficient direction-r)f-arrival based adaptive beamforming algorithm for orthogonal frequency-division multiple-access smart antenna systems is proposed. The proposed algorithm provides a high performance by steering main beams to the directions of a desired signal, whereas steering nulls to the directions of the interference, using the estimated directions. The beamforming outputs obtained by steering the main beams to the distinct directions of resolvable multipath signals are combined in a maximal ratio manner to exploit angular diversity gain. The performance elf the proposed algorithm is finally evaluated in cellular mobile environments to verify its efficiency and is compared with that of least-squares beamforming algorithm, by taking the WiBro system as a target system.
Keywords
Adaptive Beamforming; OFDMA; Smart Antennas; Ls Beamforming;
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