Linear precoder optimization for ARQ packet retransmissions in centralized multiuser MIMO uplinks

被引：10
|
作者：
Shi, Zhihua [1 ]
Sun, Haitong [2 ]
Zhao, Chunming [1 ]
Ding, Zhi [2 ]
机构：
[1] SE Univ, Natl Mobile Commun Res Lab, Nanjing 210096, Peoples R China
[2] Univ Calif Davis, Dept Elect Engn, Davis, CA 95616 USA
来源：
IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS | 2008年 / 7卷 / 02期
基金：
美国国家科学基金会;
关键词：
MIMO; multiple access channels; sum capacity; ARQ; packet retransmissions; precoding;
D O I：
10.1109/TWC.2008.060662
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 investigate the joint optimization of Automatic Repeat reQuest (ARQ) and MIMO diversity for multi-user wireless communication systems. Exploiting MIMO for diversity gain and ARQ for error correction, our goal is to better integrate MIMO and ARQ in the transceivers to improve multi-user uplink performance. Specifically, we design optimal linear precoders for ARQ retransmissions by multiple wireless uplink terminals equipped with MIMO transmitters and we rely on joint detection of multiple retransmissions at the receivers. To better utilize ARQ diversity, we derive a set of progressive linear ARQ precoders for flat fading multiple-access channels based on the criterion of maximizing the mutual information of multiuser (re)-transmissions. We propose two efficient iterative numerical algorithms to determine the optimal precoders.
引用
收藏
页码：736 / 745
页数：10
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