NDLI: User group selection scheme for lattice-reduction-aided precoder in MIMO broadcast systems

Content Provider	IEEE Xplore Digital Library
Author	Heekwang Lee Dongyoung Kwon Woohyun Seo Sungsoo Park Jemin Lee Seungjoo Maeng Jaeho Jeon Daesik Hong
Copyright Year	2010
Description	Author affiliation: Telecommunication R&D Center, Samsung Electronics Co., LTD., 416, Maetan-Dong, Youngtong-Gu, Suwon-City, Gyeonggi-Do, Korea 442-600 (Heekwang Lee; Seungjoo Maeng; Jaeho Jeon) \|\| KOMPSAT-3 Systems Engineering&Integration Dept., KOMPSAT-3 Program Office, Korea Aerospace Research Institute (KARI), 115 Gwahangno, Yuseong-Gu, Daejeon, Korea 305-333 (Dongyoung Kwon) \|\| Information and Telecommunication Lab. (B715), School of Electrical and Electronic Eng., Yonsei Univ., 134 Shinchon-dong Seodaemun-gu, Seoul, Korea, 120-749 (Woohyun Seo; Sungsoo Park; Jemin Lee; Daesik Hong)
Abstract	In multiple-input multiple-output (MIMO) broadcast channel, the lattice-reduction-aided (LRA) precoder is the modified zero-forcing beamforming (ZFBF) scheme which perturbs data symbols to reduce the transmit power. In this paper, we propose the optimal user group selection (UGS) scheme for the LRA-precoder to maximize the sum-rate in MIMO broadcast systems. We derive the approximated sum-rate of the LRA-precoder and the optimal UGS scheme. We also propose a suboptimal UGS scheme which requires low-complexity. From the simulation results, we show that the sum-rate of the proposed LRA-precoder with the optimal UGS scheme outperforms that of the conventional ZFBF with its optimal UGS scheme, especially when the number of users is small. In addition, we also show that the proposed LRA-precoder with the suboptimal UGS scheme has a considerably larger sum-rate than the conventional ZFBF with its suboptimal scheme, especially when the transmit correlation exists.
Starting Page	247
Ending Page	251
File Size	301289
Page Count	5
File Format	PDF
ISBN	9781424480173
e-ISBN	9781424480166
DOI	10.1109/PIMRC.2010.5671738
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2010-09-26
Publisher Place	Turkey
Access Restriction	Subscribed
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	MIMO Correlation Complexity theory Lattices Silicon Signal to noise ratio Array signal processing zero-forcing beamforming user group selection scheme lattice-reduction-aided precoder downlink scheduling
Content Type	Text
Resource Type	Article

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