长码MIMO CDMA系统的快速盲信道估计方法
Low-Complexity Blind Channel Estimation for Long-Code MIMO CDMA
-
摘要: 该文提出一种用于多输入多输出CDMA系统的信道快速盲估计方法。首先,设计了具有块对角结构的解相关器来消除多址干扰,然后简单地利用了解相关输出的一阶统计量,不需要训练序列,就可很好地估计出未知信道。该算法简单,仅用了少量的接收信号,具有较高的精度和鲁棒性。仿真结果表明了该估计方法的有效性。Abstract: In this paper, a low-complexity blind channel estimation technique is proposed for long-code MIMO CDMA systems. Simply based on the first-order statistic of the decorrelating matched filter output, the channel parameters can be estimated effectively without training sequences. Computer simulations show that the proposed algorithm offers good estimation behavior for MIMO CDMA systems.
-
Verdu S. Multiuser Detection. Cambridge, U K.: Cambridge Univ.Press, 1998, Chapter 1. [2]Dahlman E, et al.. WCDMA--The radio interface for future mobile multimedia communications. IEEE Trans. on Veh. Tech.,1998, 47(4): 1105- 1118.[2]Xu Zhengyuan, Tsatsanis M K. Blind channel estimation for long code multiuser CDMA systems. IEEE Trans. on Signal Processing, 2000, SP-48(4): 988 - 1001.[3]Lang Tong, Alle-Jan van der Veen, Patrick Dewilde, et al., Blind decorrelating rake receivers for long code WCDMA[J].IEEE Trans.on Signal Processing.2003, 51(6):1642-[4]Ertin E, Mitra U, Siwamogsatham S. Maximum-likelihood based multipath channel estimation for code-division multiple-access systems[J].IEEE Trans. on Communications.2001, 49(2):290-302[5]Akaike H. A new look at the statistical model identification. IEEE Trans. on Automat. Contr. 1974, AC-19(6): 716 - 723.[6]Rissanen J. Modeling by shortest data description[J].Automatica.1978, 14:465-[7]Viberg M. Subspace fitting concepts in sensor array processing.[Ph.D. dissertation], Linkoping, Sweden, Linkoping Univ., Oct.1989. -
计量
- 文章访问数: 2024
- HTML全文浏览量: 113
- PDF下载量: 875
- 被引次数: 0
下载:
