北京邮电大学学报

  • EI核心期刊

北京邮电大学学报 ›› 2010, Vol. 33 ›› Issue (1): 65-69.doi: 10.13190/jbupt.201001.65.216

• 论文 • 上一篇    下一篇

采用重排正交化的新型中继协作传输机制

王朝炜1,2;李立华1,2;徐永太1,2;王海峰3   

  1. (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. 诺基亚无线系统设备研发中心, 上海 200002)
  • 收稿日期:2009-06-23 修回日期:2009-09-28 出版日期:2010-02-28 发布日期:2010-02-28
  • 通讯作者: 王朝炜

A Novel Relay Cooperative Transmission Scheme with Bit Re-Ordering and Orthogonalization

WANG Chao-wei1,2;LI Li-hua1,2;XU Yong-tai1,2;WANG Hai-feng2   

  1. (1.Key Laboratory of Universal Wireless Communcation(Beijing University of Posts and Telecommuncations), Ministry of Education, Beijing 100876, China; 2.Wireless Technology Innovation Institute, Beijing University of Posts and Telecommunications, Beijing 100876, China;3.Wireless Modem System Research, Device R&D, Nokia, Shanghai 200002, China)
  • Received:2009-06-23 Revised:2009-09-28 Online:2010-02-28 Published:2010-02-28
  • Contact: WANG Chao-Wei

摘要:

为适应无线传输技术发展的需要,提出一种可应用于蜂窝系统的无线中继协作传输机制. 该机制基于在发送端对数据进行重排和在中继站正交化变换的思想,分别通过直传信道和中继站进行信号传输,以获取路径分集和协作分集的增益;在接收端利用信号的相关性和正交性进行合并. 此外为接收端提出了针对不同场景的接收机制,能同时应用于上行和下行链路的传输. 仿真结果表明,本协作中继传输机制较大幅度提高了通信的可靠性和吞吐量,性能优于传统的通信网络,并且实现较为简单灵活.

关键词: 协作传输, 发送分集, 正交频分复用, 中继技术

Abstract:

A relay cooperative scheme is proposed for cellular orthogonal frequency division multiplexing (OFDM) system: source station reorganizes and recombines the bits stream, destination station combines the signals from the two independent paths: direct and relay links, signals are redesigned. Furthermore, a supplementary strategy of sub-carrier symbol re-allocation is proposed to enhance the system. Simulations show that the proposed scheme achieves transmit diversity and improves system performance.

Key words: cooperative transmission, transmit diversity, orthogonal frequency division multiplexing, relay