Acta Metallurgica Sinica(English letters) ›› 2011, Vol. 18 ›› Issue (1): 1-8.doi: 10.1016/S1005-8885(10)60020-9

• Wireless •    下一篇

On the MAC-BC duality of multiuser non-regenerative MIMO relay systems

李根1,王莹1,弓风2,吴彤1,张平3   

  1. 1. 北京邮电大学
    2. 北京邮电大学信息与通信工程学院
    3. 北京邮电大学无线新技术研究所
  • 收稿日期:2010-05-06 修回日期:2010-11-11 出版日期:2011-02-28 发布日期:2011-02-28
  • 通讯作者: 李根 E-mail:buptligen@gmail.com
  • 基金资助:

    国家科技重大专项

On the MAC-BC duality of multiuser non-regenerative MIMO relay systems

  • Received:2010-05-06 Revised:2010-11-11 Online:2011-02-28 Published:2011-02-28
  • Contact: LI Gen E-mail:buptligen@gmail.com
  • Supported by:

    National Key Science and Technology Projects

摘要:

Multiple input multiple output (MIMO) relaying techniques can greatly improve the spectral efficiency and extend network coverage for future wireless systems. This article investigates a multiuser MIMO relay channel, where a base station (BS) with multiple antennas communicates with multiple mobile stations (MS) via a relay station (RS) with multiple antennas. The RS applies linear processing to the received signal and then forwards the processed signal. The dual channel conditions between MIMO relay multiple access channel (MAC) and broadcast channel (BC) are first developed for single-relay scenario with white Gaussian noise. Then the MAC-BC duality for MIMO relay systems is established by proving that the capacity region of MIMO relay MAC is equal to that of dual MIMO relay BC under the same total network transmit power constraint. In addition, the duality is also extended to multi-relay scenario with arbitrary noise. Finally, several simple general numerical examples are provided to better illustrate the effectiveness of the MIMO relay MAC-BC duality

关键词:

MIMO relay, multiuser, duality, multiple access channel, broadcast channel

Abstract:

Multiple input multiple output (MIMO) relaying techniques can greatly improve the spectral efficiency and extend network coverage for future wireless systems. This article investigates a multiuser MIMO relay channel, where a base station (BS) with multiple antennas communicates with multiple mobile stations (MS) via a relay station (RS) with multiple antennas. The RS applies linear processing to the received signal and then forwards the processed signal. The dual channel conditions between MIMO relay multiple access channel (MAC) and broadcast channel (BC) are first developed for single-relay scenario with white Gaussian noise. Then the MAC-BC duality for MIMO relay systems is established by proving that the capacity region of MIMO relay MAC is equal to that of dual MIMO relay BC under the same total network transmit power constraint. In addition, the duality is also extended to multi-relay scenario with arbitrary noise. Finally, several simple general numerical examples are provided to better illustrate the effectiveness of the MIMO relay MAC-BC duality

Key words:

MIMO relay, multiuser, duality, multiple access channel, broadcast channel

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