Joint Power Allocation and Subchannel-Pairing for Two-Way MIMO-OFDM Relay System

被引：0

作者：

Jiang, Qi ^{[1
]}

Liao, Xuewen ^{[1
]}

Wang, Wei ^{[2
]}

Zhu, Shihua ^{[1
]}

机构：

[1] Xi An Jiao Tong Univ, Dept Informat & Commun Engn, Xian 710049, Peoples R China

[2] S Dakota State Univ, Dept Elect Engn & Comp Sci, Brookings, SD 57007 USA

来源：

IEICE TRANSACTIONS ON COMMUNICATIONS | 2013年 / E96B卷 / 05期

基金：

中国国家自然科学基金;

关键词：

two-way relay network; OFDM; MIMO; subchannel pairing; resource allocation; MANAGEMENT;

D O I：

10.1587/transcom.E96.B.1168

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：

In this paper, we study the problem of joint resource allocation in the two-way relay system, where a pair of multi-antenna users wish to exchange information via multi-antenna amplify-and-forward relay under orthogonal frequency-division multiplexing (OFDM) modulation. We formulate a sum-rate maximization problem subject to a limited power constraint for each user and relay. Our resource allocation strategy aims at finding the best pairing scheme and optimal power allocation over subchannels in frequency and space domains. This turns out to be a mixed integer programming problem. We then derive an asymptotically optimal solution though the Lagrange dual decomposition approach. Finally, simulation results are provided to demonstrate the performance gain of the proposed algorithms.

引用

页码：1168 / 1175

页数：8

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