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应用科学学报 ›› 2009, Vol. 27 ›› Issue (3): 244-246.

• 通信工程 • 上一篇    下一篇

不完全信道状态信息下的Turbo-BLAST系统及性能

陈小敏， 徐大专， 虞湘宾   

  1. 南京航空航天大学信息科学与技术学院, 南京210016
  • 收稿日期:2008-06-05 修回日期:2008-11-01 出版日期:2009-05-28 发布日期:2009-05-28
  • 作者简介:陈小敏，博士生，讲师，研究方向：无线通信、空时编码的信号检测和链路自适应技术，E-mail: chenxm402@nuaa.edu.cn；徐大专，教授，博导，研究方向：无线通信、通信信号处理和无损检测，E-mail: xudazhuan@nuaa.edu.cn
  • 基金资助:
    江苏省自然科学基金(No.BK2007192)；南航人才引进基金（No.S0855-041）资助项目

Performance of Turbo-BLAST System with Imperfect Channel State Information

  1. College of Information Science and Technology, Nanjing University of Aeronautics and Astronautics, Nanjing 210016, China
  • Received:2008-06-05 Revised:2008-11-01 Online:2009-05-28 Published:2009-05-28

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摘要：

        在Turbo-BLAST方案基础上，针对信道估计有误差情况，利用不完全的信道状态信息推导出等效噪声方差，然后提出一种改进的并行干扰抵消迭代检测算法. 该算法对完全信道估计和信道估计有误差情况均有较好的适用性. 实验结果表明，所提算法可以有效改善系统误比特率性能.

关键词: Turbo-BLAST , 不完全信道状态信息 , 信道估计误差 , 并行干扰抵消迭代检测

Abstract:

       For the case of imperfect channel estimation, variance of equivalent noise is found with the imperfect channel state information. A modified iterative scheme of parallel interference cancellation is then proposed using the Turbo-BLAST scheme. The scheme is suited to the Turbo-BLAST system with perfect or imperfect channel state information. Simulation results show that the proposed scheme is effective in improving BER performance.

Key words: Turbo-BLAST ,  imperfect channel state information , channel estimation error , parallel interference , cancellation iterative detection

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