UPLINK

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On the local delay and energy efficiency under decoupled uplink and downlink in HetNets被引量：3
《Science China(Information Sciences)》2022年第3期221-230,共10页Tianjie HUANG Fu-Chun ZHENG Lifeng LAI 
supported in part by National Major Research and Development Program of China (Grant No. 2020YFB1805005);Shenzhen Science and Technology Program (Grant Nos. KQTD20190929172545139, JCYJ20180306171815699)。
With the proliferation of the Internet of Things, uplink transmission performance has become more and more important. Moreover, with the traditional coupled uplink(UL)/downlink(DL) access(CUDA) mode, it is becoming ha...
关键词：coupled and decoupled UL/DL access HetNets stochastic geometry local delay energy efficiency UDN 
Uplink transmission design for crowded correlated cell-free massive MIMO-OFDM systems被引量：2
《Science China(Information Sciences)》2021年第8期123-138,共16页Junyuan GAO Yongpeng WU Yongjian WANG Wenjun ZHANG Fan WEI 
National Key R&D Program of China(Grant No.2018YFB1801102);Jiangxi Key R&D Program(Grant No.20181ACE50028);National Natural Science Foundation of China(Grant No.61701301);Open Research Project of State Key Laboratory of Integrated Services Networks(Xidian University)(Grant No.ISN20-03);Shanghai Key Laboratory of Digital Media Processing and Transmission(Grant No.STCSM18DZ2270700);National Natural Science Foundation of China(Grant No.61931019);Shanghai Key Laboratory of Digital Media Processing and Transmission(Grant No.STCSM18DZ2270700).
In cell-free massive multiple-input multiple-output(MIMO)orthogonal frequency division multiplexing(OFDM)systems,user equipments(UEs)are served by many distributed access points(APs),where channels are correlated owin...
关键词：APSP set allocation cell-free massive MIMO-OFDM correlated channels crowded scenarios power control 
Adaptive network-aware Fe LAA LBT strategy for fair uplink Fe LAA-Wi Fi coexistence
《Science China(Information Sciences)》2018年第8期230-232,共3页Wei WANG Pingping XU Yuan ZHANG Hongyun CHU 
supported by National Natural Science Foundation of China(Grant No.61571111)
Dear editor,To offload excessive traffic of long-term evolution(LTE),the 3rd generation partnership project(3GPP)has introduced licensed-assisted access(LAA)framework to the 5 GHz unlicensed band.In 2017,the 3GPP tech...
关键词：LBT LAA FE Adaptive network-aware Fe LAA LBT strategy for fair uplink Fe LAA-Wi Fi coexistence 
Uplink spectral efficiency analysis of multi-cell multi-user massive MIMO over correlated Ricean channel被引量：2
《Science China(Information Sciences)》2018年第8期191-204,共14页Juan CAO Dongming WANG Jiamin LI Qiang SUN Ying HU 
supported in part by Natural Science Foundation of China(Grant Nos.61501113,61521061,61401241,61501264);Natural Science Foundation of Jiangsu Province(Grant No.BK201506-30);Open Research Fund of National Mobile Communications Research Laboratory,Southeast University(Grant No.2015D02)
In this study, the performance of uplink spectral efficiency in massive multiple input multiple output(MIMO) over a spatially correlated Ricean fading channel is presented. The maximum ratio combining(MRC) receiver is...
关键词：massive MIMO pilot contamination Ricean fading spacial correlation uplink rate 
Joint user grouping and resource allocation for uplink virtual MIMO systems
《Science China(Information Sciences)》2016年第2期56-69,共14页Xiaofeng LU Kun YANG Wenna LI Shaojun QIU Hailin ZHANG 
supported by National Natural Science Foundation of China(Grant Nos.61371127;61471361;61401330;61572389);EU FP7 Project CROWN(PIRSES-GA-2013-610524);National High-tech R&D Programof China(863 Program)(Grant No.2015AA01A705);111 Project in Xidian University of China(Grant No.B08038)
MIMO has become a core technology of 5G network to largely improve system throughput. Due to the cost and size of the user equipment（UE）, the application of MIMO uplink is limited by the difficulty in practical impl...
关键词：virtual MIMO user grouping average MSE system throughput resource allocation 
Energy efficient design for multiuser downlink energy and uplink information transfer in 5G被引量：7
《Science China(Information Sciences)》2016年第2期70-77,共8页Chunguo LI Yanshan LI Kang SONG Luxi YANG 
supported by National Basic Research Program of China(973 Program)(Grant Nos.2012CB316004;2013CB336600);National Natural Science Foundation of China(Grant Nos.61201172;61372101;61221002);National High-tech R&D Program of China(863 Program)(Grant No.2014AA012104);Fundamental Research Funds for the Central Universities and Open Research Fund of Key Lab of Broadband Wireless Comm.and Sensor Network Tech.(NJUPT);Ministry of Education(Grant No.NYKL201502)
Simultaneous wireless information and power transfer（SWIPT） is studied in this paper for the wireless powered downlink（DL） and multiuser information uplink（UL） systems. The objective is to maximize the energy ef...
关键词：energy harvest time allocation energy efficiency uplink multiuser throughput maximization analytical expression 
Performance analysis for uplink massive MIMO systems with a large and random number of UEs被引量：4
《Science China(Information Sciences)》2016年第2期159-167,共9页Ang YANG Chengwen XING Zesong FEI Jingming KUANG 
supported in part by Ericsson;China National S&T Major Project(Grant No.2013ZX03003002-003);National Natural Science Foundation of China(Grant No.61421001);National High-tech R&D Program of China(863 Program)(Grant No.2014AA01A701)
In this paper, we analyze the ergodic achievable rate of an uplink massive multi-user multipleinput multiple-output（MIMO） system with a large and Poisson distributed number of users. In the considered scenario, mult...
关键词：massive MIMO large numbers of UEs maximum ratio combining detector zero-forcing detector ergodic achievable rates 
Research on user pairing algorithm for LTE femtocell uplink被引量：7
《Science China(Information Sciences)》2014年第8期88-97,共10页WANG Jie XU Chen YOU XiaoHu 
supported by China MIIT Municipal Science&Technology Project(Grant No.2011ZX03001-00602);National High-tech R&D Program of China(863)(Grant No.2012AA011401)
In this article, a new simulated annealing based bit error rate pairing scheduling （SA-BPS） algorithm for LTE femtocell uplink virtual multiple input multiple output （V-MIMO） systems is proposed, which uses Round ...
关键词：user pairing FEMTOCELL simulated annealing V-MIMO bit error rate 
Uplink resource allocation in OFDMA system using distributed antennas被引量：1
《Science China(Information Sciences)》2013年第12期293-298,共6页YAN JiLei LI JianDong ZHAO LinJing SHI Hua 
supported in part by Key Project of National Natural Science Foundation of China (Grant No. 61231008);National Basic Research Program of China (Grant No. 2009CB320404);National Natural Science Foundation of China (Grant Nos. 60902032, 61301168);National Science and Technology Major Specific Project of China (Grant No. 2010ZX03005-003);111 Project (Grant No. B08038)
In this article, we investigate uplink resource allocation in orthogonal frequency division multiple access （OFDMA） systems that use distributed antennas. The multiple distributed receiving antennas motivate us to e...
关键词：uplink OFDMA system distributed antennas subcarrier assignment power allocation heuristicalgorithm 
Joint subcarrier and power allocation in uplink OFDMA systems based on stochastic game被引量：1
《Science China(Information Sciences)》2010年第12期2557-2566,共10页WU Dan CAI YueMing SHENG YanMing 
supported by the Jiangsu Natural Science Foundation (Grant No. BK2010101);the National Natural Science Foundation of China (Grant No. 60972051);the Important National Science & Technology Specific Project (Grant No. 2010ZX03006-002-04);the Open Research Fund of National Mobile Communications Research Laboratory,Southeast University (Grant No. 2010D09)
In uplink orthogonal frequency division multiplexing access （OFDMA） systems, efficient resource allocation can greatly improve system performance. Therefore, in this paper, we present a game-theoretical approach to ...
关键词：stochastic game OFDMA subcarrier allocation power allocation learning automata linear reward-inaction 
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