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.
出处
《信号处理》
CSCD
北大核心
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
关键词
目标跟踪
PDA算法
性能估计
target tracking
PDA algorithm
performance estimation