两跳OFDM-AF接力系统中的子载波配对技术

doi:10.13190/jbupt.200801.135.070

北京邮电大学学报 ›› 2008, Vol. 31 ›› Issue (1): 135-139.doi: 10.13190/jbupt.200801.135.070

• 研究报告 • 上一篇

两跳OFDM-AF接力系统中的子载波配对技术

周明宇1,2, 李立华1,2, 张平1,2, 王海峰3, 陶小峰1,2

(1. 泛网无线通信教育部重点实验室（北京邮电大学），北京 100876; 2. 北京邮电大学无线新技术研究所，北京 100876; 3. 诺基亚技术平台，上海200002)

收稿日期:2007-06-08 修回日期:1900-01-01 出版日期:2008-02-28 发布日期:2008-02-28
通讯作者: 周明宇

Sub-Carrier Coupling for Two Hop OFDM-AF Relaying Systems

ZHOU Ming-yu1,2, LI Li-hua1,2, ZHANG Ping1,2, WANG Hai-feng3, TAO Xiao-feng1,2

(1. Key Laboratory of Universal Wireless Communications (Beijing University of Posts and Telecommunications), Ministry of Education, Beijing 100876, China; 2. Beijing University of Posts and Telecommunications Wireless Technology Innovation Institute, Beijing 100876, China; 3. Technology Platform, Nokia, Shanghai 200002, China)

Received:2007-06-08 Revised:1900-01-01 Online:2008-02-28 Published:2008-02-28
Contact: ZHOU Ming-yu

摘要/Abstract

摘要：

分析了基于放大前传的两跳正交频分复用接力系统.针对因信号在两跳过程中被置于相同子载波传输而限制系统性能的问题，提出了子载波配对技术，并采用匈牙利算法提出了最优配对方案.进一步提出了基于子带的子载波配对方案.仿真结果表明，子载波配对技术能为系统带来约5dB的增益；基于子带的子载波配对的增益略低，但能大大降低信令开销.

关键词: 放大前传, 正交频分复用, 匈牙利算法

Abstract:

An amplify-and-forward (AF) based two-hop orthogonal frequency division multiplexing (OFDM) relaying system was analyzed. Since channel fading of the first hop and second hop is independent, system performance is limited if the signal is transmitted on the same sub-carrier in both hops. In order to solve the problem, a sub-carrier coupling method was proposed. A Hungarian algorithm was adopted to provide the optimal coupling scheme, and furthermore, sub-carrier coupling scheme based on sub-bands was presented. Simulations indicate that sub-carrier coupling can bring about 5 dB gain to the system. Though the gain of sub-carrier coupling scheme based on sub-bands only has a little loss, it can reduce signaling overhead greatly.

Key words: amplify-and-forward, orthogonal frequency division multiplexing, Hungarian algorithm

中图分类号:

TN911.2

周明宇1,2, 李立华1,2, 张平1,2, 王海峰3, 陶小峰1,2. 两跳OFDM-AF接力系统中的子载波配对技术[J]. 北京邮电大学学报, 2008, 31(1): 135-139.

ZHOU Ming-yu1,2, LI Li-hua1,2, ZHANG Ping1,2, WANG Hai-feng3, TAO Xiao-feng1,2
. Sub-Carrier Coupling for Two Hop OFDM-AF Relaying Systems[J]. JOURNAL OF BEIJING UNIVERSITY OF POSTS AND TELECOM, 2008, 31(1): 135-139.

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两跳OFDM-AF接力系统中的子载波配对技术

Sub-Carrier Coupling for Two Hop OFDM-AF Relaying Systems

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