A Robust Tomlinsion-Harashima Precoding Design with Outdated CSIT

doi:10.1016/S1005-8885(09)60447-7

中国邮电高校学报(英文) ›› 2010, Vol. 17 ›› Issue (2): 59-62.doi: 10.1016/S1005-8885(09)60447-7

A Robust Tomlinsion-Harashima Precoding Design with Outdated CSIT

王绪振¹,贺志强²,牛凯²,吴伟陵³,于光炜²

1. 北京邮电大学信息与通信工程学院
2. 北京邮电大学
3. 北京邮电大学信息工程学院

收稿日期:2009-03-02 修回日期:2009-09-28 出版日期:2010-04-30 发布日期:2010-06-01
通讯作者: 王绪振 E-mail:Gxitao@gmail.com
基金资助:
国家重点基础研究发展计划（973项目）2007CB310604 和 2009CB320401；国家自然科学基金60772108 和 60702048

一种基于时延CSIT的鲁棒THP预编码器设计

Received:2009-03-02 Revised:2009-09-28 Online:2010-04-30 Published:2010-06-01

摘要/Abstract

摘要：

发射端信道状态信息(CSIT)的获取对多输入多输出系统的有重要的影响，尤其是预编码机制。但是，在实际系统中很难得到完全的发射端信道状态信息。本文采用了一种有效并且具有实际意义的动态发射端信道状态信息获取模型来获取不完全的发射端信道信息。为了切合实际，本模型考虑了信道的时间和空间相关性。根据相关性，利用过时的信道信息来对当前信道进行估计，并得到估计误差方差。基于动态CSIT模型估计得到的信道信息，通过拉格朗日乘数法推导出闭式的THP预编码器。仿真证明本文提出方法具有很好性能。

关键词:

鲁棒THP预编码

Abstract:

The channel state information at transmitter (CSIT) acquisition takes significant effect in the MIMO system, especially for the precoding schemes. However, it is unrealizable to acquire the perfect CSIT in practice. In this paper, an effective and practical dynamic CSIT model is introduced to acquire the imperfect channel state information (CSI). For practicability, the channel temporal and spatial correlations are taken into account. Due to these correlations, the channel estimate and its error covariance is obtain by utilizing the outdated CSI. Based on the dynamic CSIT mode, closed-form solution of Tomlinsion-Harashima precoding (THP) is derived through a Lagrangian approach. Numerical simulations are given to demonstrate the excellent performance.

Key words:

robust THP

参考文献

1. Wesel R D, Cioffi J M. Achievable rates for Tomlinsion-Harashima precoding. IEEE Transactions on Information Theory, 1998, 44(2): 824-831

2. Bizaki H K, Falahati A. Tomlinsion-Harashima precoding with imperfect channel state information. IET Communications, 2008, 2(1): 151-158

3. Dietrich F A, Breun P, Utschick W. Robust Tomlinson-Harashima precoding for the wireless broadcast channel. IEEE Transactions on Signal Processing, 2007, 55(2): 631-644

4. Zheng Y R, Xiao C S. Simulation models with correct statistical properties for Rayleigh fading channels. IEEE Transactions on Communications, 2003, 51(6): 920-928

5. Vu M, Paulraj A. On the capacity of MIMO wireless channels with dynamic CSIT. IEEE Journal on Selected Areas in Communications, 2007, 25(7): 1269-1283

6. Dietrich F A. Robust signal processing for wireless communication. Beilin, Germany: Springer, 2007

7. Kusume K, Joham M, Utschick W, et al. Cholesky factorization with symmetric permutation applied to detecting and precoding spatially multiplexed data streams. IEEE Transactions on Signal Processing, 2007, 55(6): 3089-3103

8. Zhang X D. Matrix analysis and applications. Beijing, China: Tsinghua University Press, 2005 (in Chinese)

9. Pedersen K I, Andersen J B, Kermoal J P, et al. A stochastic multiple-input-multiple-output radio channel model for evaluation of space-time coding algorithms. Proceedings of the Vehicular Technology Conference (VTC-Fall’00): Vol 2, Sep 24-28, 2000, Boston, MA, USA. Piscataway, NJ, USA: IEEE, 2000: 893-897

10. Li X M, Bai B M. Precoding based on minimum mean square error for multi-user MIMO downlinks. Journal of Chongqing University of Posts and Telecommunications (Natural Science), 2010, 22(1): 11-13 (in Chinese)

A Robust Tomlinsion-Harashima Precoding Design with Outdated CSIT

一种基于时延CSIT的鲁棒THP预编码器设计

PDF

可视化

摘要/Abstract

引用本文

使用本文

参考文献

相关文章 0

编辑推荐

Metrics

本文评价