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不完全量测下随机有偏离散系统的Cramér-Rao下界

Cramér-Rao lower bounds for stochastic-bias discrete-time system with incomplete measurements
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摘要 针对含有不完全随机有偏测量序列的状态估计问题,给出了统计意义下的修正递推估计误差方差Cramér-Rao下界(CRLB)求解算法.首先建立了不完全随机有偏量测离散系统的数学模型,进而推导了枚举的CRLB和统计意义的CRLB计算式,该统计意义的CRLB为枚举CRLB的下界,其计算量远小于枚举CRLB求解的计算量.最后,以给定探测概率和偏差发生率下的一类光电跟踪系统为例,进行了数字仿真. A modified recursive Cramer-Rao lower bound(CRLB) of the statistical estimation error variance is derived for the state estimation with incomplete and stochastic-biased measurement sequences. Firstly, a mathematical model of the discrete-time system with incomplete and stochastic-biased measurements is built; and then, the enumeration CRLB and the statistical CRLB are derived, respectively. The proposed statistical CRLB is a lower bound of the enumeration CRLB, but its calculation complexity is far lower than that of the enumeration CRLB. Simulation is performed in an optical-electrical tracking system with pre-specified detection probability and biased occurrence probability.
出处 《控制理论与应用》 EI CAS CSCD 北大核心 2010年第7期927-932,共6页 Control Theory & Applications
基金 国家自然科学基金资助项目(60804019,60874118) 南京理工大学科技发展基金资助项目(XKF09020)
关键词 状态估计 不完全量测 随机有偏 CRAMER-RAO下界 state estimation incomplete measurements stochastic-bias Cramer-Rao lower bound
作者简介 刘锐(1981-),男,博士研究生,目前研究方向为导航制导与控制、火力与指挥控制,E—mail:liurui2001-2001@yahoo.com.cn; 戚国庆(1977-),男,讲师,目前研究方向为目标跟踪和多传感器数据融合,E—mail:qiguoqing@mail.njust.edu.cn; 陈黎(1981-),男,博士研究生,日前研究方向为非线性估计、多传感器数据融合,E—mail:hncschenli@126.com; 盛安冬(1964-),男,研究员,博士生导师,目前研究方向为非线性估计、火力与指挥控制,E—mail:shengandong@mail.njust.edu.cn.
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参考文献12

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