Training and Feedback Optimization for Multiuser MIMO Downlink

被引：109

作者：

Kobayashi, Mari ^{[1
]}

Jindal, Nihar ^{[2
]}

Caire, Giuseppe ^{[3
]}

机构：

[1] SUPELEC, Dept Telecommun, F-91190 Gif Sur Yvette, France

[2] Univ Minnesota, Dept Elect & Comp Engn, Minneapolis, MN 55455 USA

[3] Univ So Calif, Viterbi Sch Engn, EE Dept, Los Angeles, CA 90089 USA

来源：

IEEE TRANSACTIONS ON COMMUNICATIONS | 2011年 / 59卷 / 08期

关键词：

MIMO broadcast channel; multiuser MIMO downlink; channel etate information feedback; channel estimation; CHANNELS;

D O I：

10.1109/TCOMM.2011.051711.090752

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

We consider a MIMO fading broadcast channel where the fading channel coefficients are constant over time-frequency blocks that span a coherent time x a coherence bandwidth. In closed-loop systems, channel state information at transmitter (CSIT) is acquired by the downlink training sent by the base station and an explicit feedback from each user terminal. In open-loop systems, CSIT is obtained by exploiting uplink training and channel reciprocity. We use closed-form lower bounds and tight approximations of the ergodic achievable rate in the presence of CSIT errors in order to optimize the overall system throughput, by taking explicitly into account the overhead due to channel estimation and channel state feedback. Based on three time-frequency block models inspired by actual systems, we provide useful guidelines for the overall system optimization. In particular, digital (quantized) feedback is found to offer a substantial advantage over analog (unquantized) feedback.

引用

页码：2228 / 2240

页数：13

共 20 条

[1]

[Anonymous], 2005, Wireless Communications

[2] Fading channels: Information-theoretic and communications aspects [J].

Biglieri, E ;

Proakis, J ;

Shamai, S .

IEEE TRANSACTIONS ON INFORMATION THEORY, 1998, 44 (06) :2619-2692

[3]

Boyd S., 2004, CONVEX OPTIMIZATION, VFirst, DOI DOI 10.1017/CBO9780511804441

[4] On the achievable throughput of a multiantenna Gaussian broadcast channel [J].

Caire, G ;

Shamai, S .

IEEE TRANSACTIONS ON INFORMATION THEORY, 2003, 49 (07) :1691-1706

[5]

Caire G., 2010, IEEE T INF THEORY, V56

[6]

DANA A, 2006, P IEEE INT S INF THE

[7] On downlink beamforming with greedy user selection: Performance analysis and a simple new algorithm [J].

Dimic, G ;

Sidiropoulos, ND .

IEEE TRANSACTIONS ON SIGNAL PROCESSING, 2005, 53 (10) :3857-3868

[8] How much training is needed in multiple-antenna wireless links? [J].

Hassibi, B ;

Hochwald, BM .

IEEE TRANSACTIONS ON INFORMATION THEORY, 2003, 49 (04) :951-963

[9] MIMO broadcast channels with finite-rate feedback [J].

Jindal, Nihar .

IEEE TRANSACTIONS ON INFORMATION THEORY, 2006, 52 (11) :5045-5060

[10]

JOSE J, 2007, ARXIVCSIT07094513

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