Low-complexity optimal spatial channel pairing for AF-based multi-pair two-way relay networks

被引：2

作者：

Shu Feng ^{[1
,2
,3
]}

Chen Yu ^{[1
]}

You XiaoHu ^{[2
]}

Lu JinHui ^{[1
]}

机构：

[1] Nanjing Univ Sci & Technol, Sch Elect & Opt Engn, Nanjing 210094, Jiangsu, Peoples R China

[2] Southeast Univ, Natl Mobile Commun Res Lab, Nanjing 210096, Jiangsu, Peoples R China

[3] Nanjing Univ Sci & Technol, Ministerial Key Lab JGMT, Nanjing 210094, Jiangsu, Peoples R China

来源：

SCIENCE CHINA-INFORMATION SCIENCES | 2014年 / 57卷 / 10期

基金：

中国国家自然科学基金;

关键词：

multipair two-way relay; spatial channel pairing; maximizing sum-rate; arrangement inequalities of product; relaying station; CAPACITY THEOREMS; FEEDBACK DELAY;

D O I：

10.1007/s11432-014-5102-z

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

This paper considers a multi-pair two-way relay system with multi-antenna users and proposes a low-complexity optimal spatial channel pairing (SCP) strategy at the relay station (RS) for such a system. The proposed SCP scheme, following the BD-like beamformer at RS, pairs the uplink spatial subchannels of each user pair with the corresponding downlink spatial subchannels by maximizing sum-rate (Max-SR). Furthermore, a new mathematical inequality (arrangement inequalities of a product) is developed and applied to obtain sufficient and necessary conditions for achieving Max-SR-SCP. This also yields a simple low-complexity implementation of the proposed SCP in contrast to the NP-hard complexity of the original Max-SR-SCP problem. Simulation results illustrate that the proposed Max-SR-SCP achieves substantial sum-rate gains over other pairing schemes.

引用

页码：1 / 10

页数：10

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