嵌入强跟踪滤波器的高可靠多用户检测算法  

High reliable multiuser detector based on strong tracking filter

作　　者：薛奕冰[1] 李建东[1] 

机构地区：[1]西安电子科技大学ISN国家重点实验室/宽带无线通信实验室,陕西西安710071

出　　处：《西北大学学报（自然科学版）》2005年第2期137-141,共5页Journal of Northwest University（Natural Science Edition）

基　　金：国家自然科学基金;微软亚洲研究院联合资助项目(60372048);高等学校优秀青年教师教学科研奖励计划;国家自然科学基金重大项目(60496316);教育部科学技术研究重点项目(104171);国家863计划重大课题基金资助项目(2001AA123031)

摘　　要：目的研究使多用户检测中的最优判决向量的估计精度在稳态的CDMA系统状态发生跃迁时不降低的算法。方法采用嵌入强跟踪滤波器的高可靠卡尔曼滤波多用户检测算法。结果将基于标准卡尔曼滤波器的仿真结果和基于强跟踪滤波器的仿真结果做了比较,可以看出,后者收敛速度快、跟踪能力强、具有较高的数值鲁棒性。结论该方法能够有效抑制阵发性多用户干扰,具有较强的抗多址干扰能力和较高的可靠性。Aim A new algorithm is proposed to make the estimation precision of the optimal decision vector of CDMA multiuser receiver not reduce when the CDMA system transfers from one stable state to the other.Methods A high reliable Kalman filter multiuser detector based on strong tracking filter is described.Results Simulation result based on the standard Kalman filter is compared with the one based on strong tracking filter. It can be seen that the latter can converge rapidly, track in high accuracy and has satisfied numeric stability.Conclusion Simulation results show that STFMD can eliminate paroxysmal multiple access interference (MAI) efficiently and has excellent capability of anti-multiple access interference and high reliability.

关 键 词：CDMA 多址干扰 多用户检测 强跟踪滤波器 

分 类 号：TN929.5[电子电信—通信与信息系统]