User Selection Method Adopting Cross-Entropy Method for a Downlink Multiuser MIMO System
- Authors
- Kim, Kyunghoon; Yang, Hyunwook; Choi, Seungwon
- Issue Date
- Jan-2014
- Publisher
- SPRINGER
- Keywords
- MU-MIMO; User selection; Cross entropy method; Sum-rate; Complexity
- Citation
- WIRELESS PERSONAL COMMUNICATIONS, v.74, no.2, pp.789 - 802
- Indexed
- SCIE
SCOPUS
- Journal Title
- WIRELESS PERSONAL COMMUNICATIONS
- Volume
- 74
- Number
- 2
- Start Page
- 789
- End Page
- 802
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/160919
- DOI
- 10.1007/s11277-013-1321-7
- ISSN
- 0929-6212
- Abstract
- This letter presents a novel method of user selection in a downlink multi-user multiple input multiple output (MU-MIMO) system employing the precoding procedures of zero forcing or block diagonalization (BD). The proposed technique utilizes the cross-entropy method (CEM) in order to maintain a performance level comparable to that of the full search (FS) method with reasonable complexity. With the CEM, the proposed system can select multiple users at once instead of selecting a single user at each step. From various computer simulations, it has been verified that the proposed method exhibits nearly 98 % of the sum-rate compared to the FS method, which implies that the proposed method far outperforms conventional methods such as semi-orthogonal user selection (SUS) or the capacity-based suboptimal user selection (CBSUS) algorithm. Compared to CBSUS, the proposed technique enhances the sum-rate by approximately 1.1 bps/Hz with about half the complexity when each user is equipped with two receiving antennas. In the case where each user is equipped with a single antenna, the proposed method outperforms the method of SUS by about 0.3 bps/Hz, at the expense of a complexity increase of times.
- Files in This Item
-
Go to Link
- Appears in
Collections - 서울 공과대학 > 서울 융합전자공학부 > 1. Journal Articles
![qrcode](https://api.qrserver.com/v1/create-qr-code/?size=55x55&data=https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/160919)
Items in ScholarWorks are protected by copyright, with all rights reserved, unless otherwise indicated.