OFDM Relay Cognitive Radio Multiple Antennas Resource Allocation Full Duplex Spectrum Sensing Synchronization Spectrum Sharing Interference Cancellation Channel Estimation Feedback Heterogeneous Networks Bi-directional Energy Harvesting Stochastic Geometry HetNet relay networks FBMC Equalization channel capacity TVWS CDMA interference in-band full-duplex system Duplex MIMO Ultra Low Power C-V2V 5G Reliability SC-FDMA interference suppression D-TDD CLI indoor positioning reinforcement learning RSRP weighting - Computation offloading smart factory Cell-free multi-access edge computing estimated position overlapping —Device-to-device (D2D) estimated position updating mMIMO control overhead hybrid NR positioning Femtocell Rat-dependent positioning frame structure Zigbee body area networks channel estimation error Handoff CoMP User grouping power uncertainty ultra-dense small cell network mode selection antenna arrays 5G mobile communication UFMC resource block management inter user interference WVAN health care partial overlap GFDM Dynamic TDD Multi-user Receiver Number of training blocks Uplink SCMA system V2X Vehicular communication cross-link interference LTE-TDD FS-NOMA Location-based user fairness Mode 3 QR Factorization Metaheuristics P-NOMA non-orthogonal multiple access dynamic HetNet spectrum partitioning and 5G networks. massive connectivity non-orthogonal multiple access (NOMA) overloading DQN OTDOA distributed mode Communication range resource selection maximum likelihood method Resource sharing Power allocation packet delay
Status : Presented 
Date : 2010-09 
Title : User Group Selection Scheme for Lattice-Reduction-Aided Precoder in MIMO Broadcast Systems 
Authors : Heekwang Lee, Dongyoung Kwon, Woohyun Seo, Sungsoo Park, Jemin Lee, Seungjoo Maeng, Jaeho Jeon and Daesik Hong 
Conference : PIMRC 2010 
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. 
URL : http://ieeexplore.ieee.org/xpls/abs_all.jsp?arnumber=5671738 
Download : http://mirinae.yonsei.ac.kr/?module=file...819e4ed1a2 

Heekwang Lee; Dongyoung Kwon; Woohyun Seo; Sungsoo Park; Jemin Lee; Seungjoo Maeng; Jaeho Jeon; Daesik Hong; , "User group selection scheme for lattice-reduction-aided precoder in MIMO broadcast systems," Personal Indoor and Mobile Radio Communications (PIMRC), 2010 IEEE 21st International Symposium on , vol., no., pp.247-251, 26-30 Sept. 2010
doi: 10.1109/PIMRC.2010.5671738
URL: http://ieeexplore.ieee.org/stamp/stamp.jsp?tp=&arnumber=5671738&isnumber=5671569

List of Articles
Status Datesort
» [IEEE PIMRC] Heekwang Lee, Dongyoung Kwon, Woohyun Seo, Sungsoo Park, Jemin Lee, Seungjoo Maeng, Jaeho Jeon and Daesik Hong, "User Group Selection Scheme for Lattice-Reduction-Aided Precoder in MIMO Broadcast Systems", PIMRC 2010, Sep. 2010 file Presented  2010-09 
3 [IEEE PIMRC] Hyungjong Kim, Sungeun Lee, Kyungchuk Kwak, Hyunkee Min, and Daesik Hong, "On the Design of ZF and MMSE Tomlinson-Harashima Precoding in Multiuser MIMO Amplify-and-Forward Relay System", IEEE PIMRC, Sep. 2009 file Presented  2009-09 
2 [IEEE PIMRC] Hyungjong Kim, Kyungchul Kwak and Daesik Hong, "The Effect of Spatial Diversity in MIMO System with Multiuser Diversity Scheduler", PIMRC, Sep. 2008 file Presented  2008-09 
1 [IEEE PIMRC] Myeongyun Cho, Youngju Kim, Jaekon Lee and Daesik Hong, "A CQI Feedback Reduction Scheme for Multi-User MIMO/OFDMA Systems", PIMRC 2007, Sep. 2007 Presented  2007-09