ETRI-Knowledge Sharing Plaform

KOREAN
논문 검색
Type SCI
Year ~ Keyword

Detail

Journal Article Joint User Scheduling and Adaptive Intercell Interference Cancelation for MISO Downlink Cellular Systems
Cited 15 time in scopus Share share facebook twitter linkedin kakaostory
Authors
Sung-Hyun Moon, Changhee Lee, Sang-Rim Lee, Inkyu Lee
Issue Date
2013-01
Citation
IEEE Transactions on Vehicular Technology, v.62, no.1, pp.172-181
ISSN
0018-9545
Publisher
IEEE
Language
English
Type
Journal Article
DOI
https://dx.doi.org/10.1109/TVT.2012.2217363
Abstract
Recently, an adaptive intercell interference (ICI) mitigation technique has been proposed for downlink cellular systems as a means to increase throughput with low system complexity. However, in the prior work, the issue of intercell user scheduling has not been considered. In this paper, we study multiple-input-single-output (MISO) downlink cellular systems that jointly design adaptive ICI cancelation (ICIC) and intercell user scheduling assuming that partial channel state information (CSI) is shared among base stations (BSs). Since the optimal solution would require high complexity, we investigate a new low-complexity algorithm that selects the best users and their beamforming strategies in terms of maximizing the weighted sum rate (WSR). To this end, we first develop a simple threshold criterion for each user to decide the preferred beamforming strategy based on the derivation of the expected signal-to-interference-plus-noise ratio (SINR). Then, according to users' feedback about their decisions, a successive user and beamforming selection algorithm is performed at the BSs. From simulation results, we show that, combined with proportional fair scheduling, the proposed scheme provides excellent throughput performance with very low computational complexity and the amount of inter-BS CSI exchange. Furthermore, we discuss an extension of the proposed scheme to limited feedback systems and observe that our algorithm also provides similar advantages over conventional schemes with quantized feedback. © 2012 IEEE.
KSP Keywords
Cellular system, Channel State Information(CSI), Interference Cancelation, Low computational complexity, Low-complexity algorithm, MISO downlink, Multiple-input single-output(MISO), Partial channel state information, Proportional Fair Scheduling, Quantized Feedback, Throughput performance