基于两跳载波配对策略的非再生OFDM中继系统性能优化

吴彤; 王莹; 束超; 张平

doi:10.3724/SP.J.1146.2007.00736

基于两跳载波配对策略的非再生OFDM中继系统性能优化

doi: 10.3724/SP.J.1146.2007.00736

吴彤^① 王莹,,
王莹,
束超,
张平

基金项目:

国家自然科学基金(60496312)和爱立信公司资助课题

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出版历程
- 收稿日期: 2007-05-15
- 修回日期: 2007-09-27
- 刊出日期: 2008-11-19

The Performance Optimization for Non-regenerative OFDM Relaying System Based on Two-hop Subcarrier Pairing Strategy

Wu Tong^{① 王莹
,},
Wang Ying,
Shu Chao,
Zhang Ping

摘要

摘要: 该文针对非再生中继方式，分析了基于正交频分复用(OFDM)的两跳中继系统的容量，并推广到发送端具有两根天线采用空时块码(STBC)的情形。以最大化端到端的信息速率为优化准则，提出了非再生两跳载波配对定理，并结合注水定理分别在频域、空域，以及空频二维进行了资源联合优化。仿真结果表明，资源联合优化与传统的平均资源分配相比，显著提高系统容量，且STBC-OFDM能获得更高性能增益。通过子载波配对方案能进一步增强系统性能。
- 正交频分复用 /
- 非再生中继 /
- 两跳载波配对 /
- 联合优化
Abstract: Based on the non-regenerative relaying mode, the capacity of the two-hop relaying system is analyzed based on Orthogonal Frequency Division Multiplex (OFDM), and the analysis is extended to the scenario with two antennas in transmitter using Space Time Block Coding (STBC). Taking the maximum end-to-end data rate as the optimization criterion, the two-hop subcarrier pairing theorem is proposed, and the joint optimization is investigated across frequency domain, space domain as well as space-frequency planar domain respectively combined with the water-filling theory. The simulation results show that the proposed joint optimization scheme can improve the system capacity obviously compared with the uniform resource allocation scheme, and STBC-OFDM scheme can achieve performance gain. The proposed two-hop subcarrier pairing strategy can enhance the system performance further.
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参考文献(1)

[1] Pabst R, Walke B H, and Schultz D C, et al.. Relay-baseddeployment concepts for wireless and mobile broadband radio.IEEE Communication Magazine, 2004, 42(9): 80-89. [2] Sampath H, Talwar S, and Tellado J, et al.. A fourthgeneration MIMO-OFDM broadband wireless system: Design,performance and field trial results. IEEE CommunicationMagazine, 2002, 40(9): 143-149. [3] Bingham J A C. Multicarrier modulation for datatransmission: An idea whose time has come[J].IEEECommunication Magazine.1990, 28(5):5-14 [4] 张平. Beyond 3G 移动通信系统关键技术. 北京邮电大学学报,2002, 25(3): 1-6.Zhang Ping. Some research issues for beyond 3G mobilesystem. Journal of Beijing University of Posts andTelecommunications, 2002, 25(3): 1-6. [5] Tsai Y, Zhang G, and Pan, J L. Orthogonal frequencydivision multiplexing with phase modulation and constantenvelope design. In Proc. IEEE Military CommunicationsConference, Atlantic City, New Jersey, 2005, 4: 2658-2664. [6] Steiner A and Shamai S S. Single-user broadcasting protocolsover a two-hop relay fading channel[J].IEEE Trans. onInformation Theory.2006, 52(11):4821-4838 [7] Zhang Qi, Zhang Jingmei, and Shao Chunju, et al.. Powerallocation for regenerative relay channel with rayleigh fading.in Proc. IEEE VTC 2004-Spring, Milan, Italy, 2004, 1:1167-1171. [8] Zhang Jingmei, Zhang Qi, and Shao Chunju, et al.. Adaptiveoptimal transmit power allocation for two-hop nonregenerativewireless relaying system. In Proc. IEEE VTC2004-Spring, Milan, Italy, 2004, 2: 1213-1217. [9] Hammerstroem I and Wittneben A. On the optimal powerallocation for non-regenerative OFDM relay links.Proceedings of ICC, Istanbul, 2006. www.nari.ee.ethz.ch/wireless/pubs/files/icc06.pdf. [10] Hottinen A, and Heikkinen A, et al.. Subchannel assignmentin OFDM relay nodes. 40th Annual Conference onInformation Sciences and Systems, Princeton, 2006:1314-1317.

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