计算机科学 ›› 2014, Vol. 41 ›› Issue (Z11): 168-169.
陈培磊,刘萍
CHEN Pei-lei and LIU Ping
摘要: 在MIMO系统中,块对角化(BD)预编码用来消除多用户的共信道干扰(CCI)。BD预编码要求系统发射天线数大于全部用户接收天线数目的总和。当用户数增多时,用户接收天线总数随之增多,BD算法的复杂度将急剧增大。为了解决这个问题,同时使系统支持的用户数最大化,提出了一种基于BD预编码和时分复用(TDM)相结合的广播传输方案。该方案通过对用户进行分组,对组内的用户进行BD预编码,并对组间进行时分复用,从而降低系统对发射天线数目的要求和算法的复杂度。仿真结果表明,这种组合方案在支持更多用户的同时还可以获得较高的吞吐率。
[1] Telatar I E.Capacity of Multi-Antenna Gaussian Channels[J].European Transactions on Telecommunications,1999,0(6):585-595 [2] Gesbert D,Shafi M,Shiu D S,et al.From theory to practice:an overview of MIMO space-time coded wireless systems[J].IEEE J.on Selected Areas in Commun.,2003,1(4):281-302 [3] Jafar S A,Vishwanash S,Goldsmith A J.Channel Capacity and Beamforming for Multiple Transmit and Receive Antennas with Covariance Feedback[C]∥IEEE Intemational Conference on Communications.2001,7:2266-2270 [4] Chen R,Andrews J G,Heath R W.Multi-user space-time block coded MIMO system with Downlink Precoding[C]∥IEEE International Conference on Communications.2004:2689-2693 [5] Jongrem G,Skoglund M,Ottersten B.Combining eamformingand orthogonal space-time block coding[J].IEEE Trans.Info.Theory,2002,8:611-627 [6] Wong K K,Murch R D,Letaief K B.A joint-channel diagonalization for multiuser MIMO antenna systems[J].IEEE Trans.Wireless Commun.,2003,2(4):773-786 [7] Costa M.Writing on Dirty Paper[J].IEEE Trans.Info.Theory,1983,29:439-441 [8] Caire G,Shamai S.On the Achievable Throughput of a Multi-Antenna Gaussian Broadcast Channel[J].IEEE Trans.Info.Theory,2003,9:1691-1706 [9] Weingarten H,Steinberg Y,Shamai S.The capacity region ofthe Gaussian MIMO broadcast channel[J].IEEE Trans.Info.Theory,2004:174 [10] Lai U C,Murch R D.A transmit preprocessing technique formultiuser MIMO systems using a decomposition apporach[J].IEEE Trans.Wireless Commun.,2004,3(1):20-24 [11] Serbetli S,Yener A.Beamforming and Scheduling Strategies for Time Soltted Multimuser MIMO System[J].IEEE Signals,Systems and Computers,2004:1227-1231 [12] Spencer Q H,Swindlehurst A L,Hartin M.Zero-Forcing Methods for Downlink Spatial Multiplexing in Multiuser MIMO Channels[J].IEEE Transactions on Signal,2004,2(2):461-471 |
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