修正的PDA算法  

Modified PDA Algorithm and Performance Prediction

作　　者：王宏强[1] 秦玉亮[1] 李宏[1] 黎湘[1] 

机构地区：[1]国防科技大学电子科学与工程学院空间电子信息技术研究所,湖南长沙410073

出　　处：《信号处理》2009年第3期430-434,共5页Journal of Signal Processing

基　　金：国防预研项目(51301050101)资助

摘　　要：在无目标量测条件下,PDA算法用状态预测方差近似替代状态估计方差参与更新,这一近似直接影响了滤波器的跟踪性能。针对以上问题,重新推导了跟踪门内没有源于目标的量测时的状态预测方差表达式,进而得出了正确的状态估计方差的更新公式,得到了修正的PDA(MPDA)。仿真结果表明MPDA不仅在跟踪精度方面有所提高,且对其进行性能估计也更加准确。With the mistake of covariance update in PDA taken into account,the expression of state predicting variance is derived again before a update formula of state estimation variance is obtained correctly. Then a modified algorithm（MPDA） is proposed as a result. Simulation results show that the MPDA algorithm not only improves tracking precision, but also its performance estimation is more accurate than PDA＇ s.

关 键 词：目标跟踪 PDA算法 性能估计 

分 类 号：TN957[电子电信—信号与信息处理]