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应用科学学报 ›› 2006, Vol. 24 ›› Issue (5): 441-446.

• 论文 •    下一篇

信道估计误差对下行多用户迫零波束成型系统吞吐量的影响

黄森华, 邱玲, 朱近康   

  1. 中国科学技术大学个人通信与扩频实验室, 安徽合肥 230027
  • 收稿日期:2005-08-10 修回日期:2005-10-24 出版日期:2006-09-30 发布日期:2006-09-30
  • 通信作者: 邱玲,教授,博导,研究方向:无线通信、CDMA通信、无线资源管理,E-mail:lqiu@ustc.edu.cn;朱近康,教授,博导,研究方向:无线与移动通信、通信中的信号处理、无线网络及其协议,E-mail:jkzhu@ustc.edu.cn E-mail:jkzhu@ustc.edu.cn
  • 基金资助:
    国家自然科学基金(60496314);国家"863"高技术研究发展计划(2003AA12331003)资助项目

Effect of Channel Estimation Error on the Throughput of Downlink Multiuser System with Zero-Forcing Beamforming

HUANG Sen-hua, QIU Ling, ZHU Jin-kang   

  1. Personal Communication Network & Spread Specturm Laboratory, University of Science and Technology of China, Hefei 230027, China
  • Received:2005-08-10 Revised:2005-10-24 Online:2006-09-30 Published:2006-09-30

PDF

120

被引次数

4

摘要： 研究了信道估计误差对迫零波束成型的系统吞吐量的影响,利用计算机仿真,给出了信道估计误差引起的吞吐量下降程度与系统中的用户数、信噪比、发射天线数和发射子流的次序关系.仿真结果表明,在用户数适中的时候,即使基站端的信道状态信息不准确,迫零波束成型的吞吐量与发射天线数的增长仍保持线性关系,这是迫零波束成型系统优于随机波束成型系统的一个方面.根据仿真结果,还给出了满足给定系统中断概率下的参考速率因子ζ.

关键词: 下行多天线多用户系统, 信道估计误差, 吞吐量分析, 迫零波束成型

Abstract: Impact of channel estimation error on the throughput of zero-forcing beam forming (ZFBF) is studied in this paper.By computer simulation, relations between the incurred throughput loss due to channel estimation error and the system parameters such as number of users, SNR, number of transmitting antennas and the order of data sub-stream are investigated.Simulation results demonstrate that, when the user number is moderate, a ZFBF system demonstrates its advantage over random beamforming (RBF) in terms of the linear increase of throughput with the number of transmitting antennas even under imperfect channel estimation at the transmitter.Also, in this paper, a referenced rate factor is given to meet the specific outage requirement of system.The results provide a reference for the design of practical downlink multi-antenna multi-user systems.

Key words: channel estimation error, zero-forcing beamforming, downlink multi-antenna multi-user system, throughput analysis

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