상세정보
학술지
An Efficient Algorithm for Zero-Forcing Coordinated Beamforming
- 저자
- 김학수, 유희정, 성영철, 이용훈
- 발행일
- 201207
- 출처
- IEEE Communications Letters, v.16 no.7, pp.994-997
- ISSN
- 1089-7798
- 출판사
- IEEE
- 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.
- KSP 제안 키워드
- Beam design, Channel State Information(CSI), Computational complexity, Coordinated beamforming, Efficient algorithms, Multiple input multiple output(MIMO), Null-space, Perturbation theory(PT), Time step, Update algorithm, Zero forcing(ZF)