Interference Alignment with Delayed Differential Feedback for Time-Correlated MIMO Channels

被引：0

作者：

Zhou, Mingxin ^{[1
]}

Zhang, Leiming ^{[1
]}

Song, Lingyang ^{[1
]}

Debbah, Merouane ^{[2
]}

Jiao, Bingli ^{[1
]}

机构：

[1] Peking Univ, Sch Elect Engn & Comp Sci, State Key Lab Adv Opt Commun Syst & Networks, Beijing 100871, Peoples R China

[2] SUPELEC, Alcatel Lucent Chair in Flexible Radio, FR-91192 Gif Sur Yvette, France

来源：

2012 IEEE INTERNATIONAL CONFERENCE ON COMMUNICATIONS (ICC) | 2012年

关键词：

SYSTEMS; BOUNDS; RATES;

D O I：

暂无

中图分类号：

TN [电子技术、通信技术];

学科分类号：

0809 ;

摘要：

Interference alignment (IA) has been well recognized as an efficient approach to reduce interference at high signal to noise ratio (SNR). However, it demands global channel state information (CSI) at both transmitters and receivers for precoder design in order to maximize the multiplexing gain. In this paper, we discuss IA with delayed differential CSI feedback for time-correlated multiple input multiple output (MIMO) block fading channels. We consider the impact of distortion caused by channel estimation errors and quantized CSI feedback delay, and thus, find an optimal feedback interval to minimize this distortion, as well as the sum rate performance. Specifically, we derive the minimum differential feedback rate. And with the feedback-channel capacity constraint, we further study the relationship between the average sum rate and the feedback interval. Analytical results are verified by simulations.

引用

页数：5

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