中国邮电高校学报(英文)

中国邮电高校学报(英文) ›› 2013, Vol. 20 ›› Issue (3): 32-36.doi: 10.1016/S1005-8885(13)60045-X

• Wireless • 上一篇    下一篇

Joint user pairing and power allocation in uplink virtual MIMO with imperfect CSI

姚丽萍1,徐全盛1,李曦2,纪红1   

  1. School of Telecommunication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • 收稿日期:2012-07-02 修回日期:2013-04-11 出版日期:2013-06-30 发布日期:2013-06-26
  • 通讯作者: 姚丽萍 E-mail:105083@bupt.edu.cn
  • 基金资助:

    This work was supported by the National Natural Science Foundation of China (61271182), the National Natural Science Funds of China for Young Scholar (61001115), and the National Science and Technology Major Project (2011ZX03001-007-03).

Joint user pairing and power allocation in uplink virtual MIMO with imperfect CSI

  1. School of Telecommunication Engineering, Beijing University of Posts and Telecommunications, Beijing 100876, China
  • Received:2012-07-02 Revised:2013-04-11 Online:2013-06-30 Published:2013-06-26
  • Contact: Li-Ping YAO E-mail:105083@bupt.edu.cn
  • Supported by:

    This work was supported by the National Natural Science Foundation of China (61271182), the National Natural Science Funds of China for Young Scholar (61001115), and the National Science and Technology Major Project (2011ZX03001-007-03).

摘要：

User pairing strategy for virtual multi-input multi-output (VMIMO) has been widely studied to improve system throughput, but most studies are based on perfect channel state information (CSI) and uniform power allocation. However, perfect CSI is very difficult or even impossible to obtain in practical system. Moreover power allocation has significant impact on algorithm performance. Therefore, in this paper, a low-complex joint user pairing and power allocation algorithm based on aggressive discrete stochastic optimization and Lagrangian dual solution is proposed for uplink VMIMO with imperfect CSI. Simulation results show that the proposed algorithm can achieve desirable throughput performance, and restrict inter-user interference (IUI) efficiently.

关键词:

VMIMO, user pairing, power allocation, IUI

Abstract:

User pairing strategy for virtual multi-input multi-output (VMIMO) has been widely studied to improve system throughput, but most studies are based on perfect channel state information (CSI) and uniform power allocation. However, perfect CSI is very difficult or even impossible to obtain in practical system. Moreover power allocation has significant impact on algorithm performance. Therefore, in this paper, a low-complex joint user pairing and power allocation algorithm based on aggressive discrete stochastic optimization and Lagrangian dual solution is proposed for uplink VMIMO with imperfect CSI. Simulation results show that the proposed algorithm can achieve desirable throughput performance, and restrict inter-user interference (IUI) efficiently.

Key words:

VMIMO, user pairing, power allocation, IUI

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