상세정보
학술지
Efficient Multi-User MIMO Precoding Based on GSVD and Vector Perturbation
- 발행일
- 201202
- 출처
- Signal Processing, v.92 no.2, pp.611-615
- ISSN
- 0165-1684
- 출판사
- Elsevier
- 협약과제
- 11PR3500, UHF TV White Space를 이용한 CR 통신기술 개발, 정병장
- 초록
- We present an efficient precoding method by using generalized singular value decomposition (GSVD) and vector perturbation in the downlink of multi-user MIMO. Linear precoding/decoding matrices are explicitly computed through the GSVD algorithm, avoiding any matrix inversion or squaring operation. Accordingly, the computational complexity can be drastically reduced compared to the conventional iterative algorithms. In addition, by considering the inter-user interference, we derive a new perturbation vector that minimizes system-wide mean-squared-error of detected symbols. We also show that the proposed precoding scheme is suitable to update the precoding weights efficiently when the channel is newly updated, rather than recomputing the precoding weights for all users from scratch. © 2011 Elsevier B.V. All Rights Reserved.
- KSP 제안 키워드
- Computational complexity, Generalized Singular Value Decomposition(GSVD), Linear precoding, MIMO precoding, Matrix Inversion, Vector Perturbation, inter-user interference(IUI), iterative algorithms, mean square error(MSE), multiuser MIMO, precoding scheme