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학술지 An Efficient Algorithm for Zero-Forcing Coordinated Beamforming
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저자
김학수, 유희정, 성영철, 이용훈
발행일
201207
출처
IEEE Communications Letters, v.16 no.7, pp.994-997
ISSN
1089-7798
출판사
IEEE
DOI
https://dx.doi.org/10.1109/LCOMM.2012.050412.112565
협약과제
11MI1800, IEEE 802.11 VHT 초고속 무선랜 무선전송 연구, 이석규
초록
The problem of beam tracking for zero-forcing coordinated beamforming in multiple-cell time-varying multiple-input multiple-output channels is considered. Based on null-space perturbation theory, an efficient update algorithm for block-diagonalization-based zero-forcing coordinated beam design is proposed and its performance is analyzed. In slowly-varying channels, the proposed algorithm well tracks the zero-forcing beam solution and significantly reduces computational complexity by simply updating beamforming matrices instead of redesigning them with new channel state information at each time step. © 2012 IEEE.
키워드
Coordinated beamforming, coordinated multipoint, perturbation theor, time-varying channels
KSP 제안 키워드
Beam design, Channel State Information(CSI), Computational complexity, Coordinated beamforming, Efficient algorithms, Multiple input multiple output(MIMO), Perturbation theory(PT), Time step, Time-varying channels, Update algorithm, Zero forcing(ZF)