Optimal Relay Power Allocation for Amplify-and-Forward OFDM Relay Networks with Deliberate Clipping

被引：0

作者：

Zhang, Chao ^{[1
]}

Du, Qinghe ^{[1
]}

Wang, Yichen ^{[1
]}

Wei, Guo

机构：

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

来源：

2012 IEEE WIRELESS COMMUNICATIONS AND NETWORKING CONFERENCE (WCNC) | 2012年

关键词：

SYSTEMS; PERFORMANCE;

D O I：

暂无

中图分类号：

TP3 [计算技术、计算机技术];

学科分类号：

0812 ;

摘要：

Deliberate clipping is a simple solution to high Peak-to-Average Power Ratio problem of OFDM signal. In Amplify-and-Forward OFDM relay networks, due to the limited resource, deliberate clipping is also suggested. However, clipping is a nonlinear process and may cause significant performance degradation. Based on Bussgang Linearization Theory, we provide a linear system model for Amplify-and-Forward OFDM relay networks. To achieve spatial diversity, we design a practical nonlinear distortion aware receiver at the destination. Considering a total relay power constraint, we propose an optimal power allocation scheme to maximize the signal-to-noise distortion ratio. Simulation results show that our optimal relay power allocation scheme can improve the system throughput and resist the non-linear distortion. It is also verified that our proposed transmission scheme outperforms other transmission schemes without considering non-linear distortion.

引用

页数：6

共 20 条

[1]

[Anonymous], 2005, Wireless Communications

[2]

BAHAI AR, 2004, MULTICARRIER DIGITAL

[3] A theoretical characterization of nonlinear distortion effects in OFDM systems [J].

Dardari, D ;

Tralli, V ;

Vaccari, A .

IEEE TRANSACTIONS ON COMMUNICATIONS, 2000, 48 (10) :1755-1764

[4]

del Razo V, 2009, P IEEE WCNC

[5] Power allocation schemes for amplify-and-forward MIMO-OFDM relay links [J].

Hammerstroem, Ingmar ;

Wittneben, Armin .

IEEE TRANSACTIONS ON WIRELESS COMMUNICATIONS, 2007, 6 (08) :2798-2802

[6] Ergodic Capacity Analysis of Amplify-and-Forward MIMO Dual-Hop Systems [J].

Jin, Shi ;

McKay, Matthew R. ;

Zhong, Caijun ;

Wong, Kai-Kit .

IEEE TRANSACTIONS ON INFORMATION THEORY, 2010, 56 (05) :2204-2224

[7]

Jing YD, 2006, IEEE T WIREL COMMUN, V5, P3524, DOI [10.1109/TWC.2006.256975, 10.1109/TWC.2006.04505]

[8]

Kay S., 1998, FUNDAMENTALS STAT SI

[9] Cooperative diversity in wireless networks: Efficient protocols and outage behavior [J].

Laneman, JN ;

Tse, DNC ;

Wornell, GW .

IEEE TRANSACTIONS ON INFORMATION THEORY, 2004, 50 (12) :3062-3080

[10] Effects of Clipping and Filtering on the Performance of OFDM [J].

Li, Xiaodong ;

Cimini, Leonard J., Jr. .

IEEE COMMUNICATIONS LETTERS, 1998, 2 (05) :131-133

← 1 2 →