在非高斯信道下多用户检测的鲁棒算法  

Robust Multiuser Detection in Non Gaussian Channels

作　　者：杨世海[1] 周良柱[1] 

机构地区：[1]国防科技大学电子科学与工程学院,湖南长沙410073

出　　处：《国防科技大学学报》2000年第6期83-86,共4页Journal of National University of Defense Technology

摘　　要：在无线通信中应用多用户检测技术可以有效去除多路径干扰 (MAI)。实验证明 ,实际信道通常包含冲激噪声 ,从而是非高斯的。讨论了目前扩频通信 (DS SS)中应用于非高斯信道的自适应鲁棒的多用户检测技术 ,以前的研究大多存在两个缺点 :一是需要对非高斯信道的模型有一个先验估计 ;二是计算较基于高斯信道的算法复杂的多。本文从传统的特征空间的自适应跟踪技术PASTd[1] ,针对其误差模型对算法进行修改 ,提出了一种简易的鲁棒算法。经蒙特卡洛仿真证明 。In wireless system where multiuser detection techniques may be applied, the ambient channel noise is known through experimental measurements to be decidedly non Gaussian This paper consider the problem of adaptive robust detection of direct sequence spread spectrum(DS SS) signal in the presence of unknown correlated SS interference and additive non Gaussian noise Many efforts have been made and most of them have two major problems:the first, explicit a priori knowledge of the underlying noise statistics is generally not available in a realistic scenario; second, computational complexity must be taken into consideration From traditional subspace tracking techniques, we derive a robust method with low computational complexity Analytical and simulation results show that the proposed robust techniques offer significant performance better than the normal subspace tracking methods in impulsive noise

关 键 词：扩频通信 码分多址 多用户鲁棒检测 信号空间跟踪 非高斯信道 

分 类 号：TN914.42[电子电信—通信与信息系统] TN914.53[电子电信—信息与通信工程]