一种改进的子空间盲多用户检测法  

An Improved Blind Multiuser Detection Based on Subspace Tracking

作　　者：胡艳军[1] 

机构地区：[1]安徽大学电子学院通信工程系,安徽合肥230039

出　　处：《电子学报》2005年第6期1073-1076,共4页Acta Electronica Sinica

基　　金：安徽省自然科学基金项目(No.03042208)

摘　　要：本文在常规子空间盲多用户检测方法的基础上进行改进,提出一种改进的子空间盲多用户检测方法.既考虑小区内用户的干扰,也考虑来自小区外用户的干扰,将接收信号空间可以分解成三个子空间,通过对子空间模型的修改和子空间跟踪算法的改进,解决快速矩阵分解的问题,降低接收机的复杂度,在收敛速度、稳定性方面也有所提高.The blind multiuser detection based on subspace tracking is studied.An improved detector is proposed.The conventional blind multiuser detectors based on subspac e tracking consider only the in-cell users and neglect the inter-cell interfer ence from out-of-cell users,while the improved blind multiuser detector takes into account both intra-cell and inter-cell interference.The observation space of received signal is partitioned into three subspaces,and the tracking algori t hm is improved to decompose matrix rapidly.The detector exhibits faster converge nce,higher stability and less complexity.

关 键 词：CDMA 盲多用户检测 子空间跟踪 

分 类 号：TN914.53[电子电信—通信与信息系统]