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应用科学学报 ›› 2007, Vol. 25 ›› Issue (1): 11-15.

• 论文 • 上一篇    下一篇

多小区V-BLAST系统中基于后验信干比平衡的功率控制方法

魏传明, 邱玲, 朱近康   

  1. 中国科学技术大学电子工程与信息科学系, 安徽合肥 230027
  • 收稿日期:2005-12-17 修回日期:2006-03-27 出版日期:2007-01-31 发布日期:2007-01-31
  • 通信作者: 邱玲,博士,教授,研究方向:无线通信、扩频通信、移动通信中心的信号处理等,E-mail:lqiu@ustc.edu.cn;朱近康,教授,博导,研究方向:移动通信及个人通信、扩频通信、通信中的信号处理,E-mail:jkzhu@ustc.edu.cn E-mail:lqiu@ustc.edu.cn;jkzhu@ustc.edu.cn
  • 基金资助:

    国家自然科学基金(60390540);国家“863”高技术研究发展计划(2005AA123920)资助项目

A Power Control Method Based on Post-Detection SINR Balancing in Cellular V-BLAST Systems

WEI Chuan-ming, QIU Ling, ZHU Jin-kang   

  1. Department Electronic Engineering and Information Science, University of Science and Technology of China, Hefei 230027, China
  • Received:2005-12-17 Revised:2006-03-27 Online:2007-01-31 Published:2007-01-31

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摘要：

针对多小区V-BLAST系统中的同信道干扰问题,提出了一种基于后验信干比平衡的功率控制方法以及简化的次优算法,通过调整各基站每个发送天线的功率,平衡移动台接收端各路子流的后验信干比.仿真结果表明,与现有功率控制方法相比,该方法在系统中断概率以及平均误比特率(BER)上都可以达到更好的性能.次优算法在保持较高性能增益的同时显著降低了运算的复杂度.

关键词: 多输入多输出, 多小区, 功率分配, 后验信干比, 垂直分层-贝尔实验室分层空时结构

Abstract:

Power control is an effective technique to restrain the co-channel interference (CCI) in a cellular system.In this paper, an optimal power control method based on post-detection SINR balancing for a cellular V-BLAST system is proposed.Its simplified solution with reduced complexity is provided.The proposed method may balance the postdetection SINR of each substream at mobile stations (MS) by adjusting power levels of every transmit antenna at base stations (BS) in the system.Simulation results show that the proposed method outperforms existing power control methods both in the system outage probability and BER performance.The simplified solution significantly reduces computing complexity with slight performance degradation.

Key words: V-BLAST, post-detection SINR, MIMO, cellular, power allocation

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