常增益变采样率自适应滤波

CONSTANT GAIN ADAPTIVE FILTER WITH VARIABLE SAMPLING RATE

作者曾给出一种跟踪飞机机动的自适应滤波,采用直角坐标系中的9维状态量,利用最优检测统计量探测目标机动,并用估计到的机动加速度修正目标的预报值。 本文将在文献[1]的基础上,提出两种简化自适应滤波。其一,采用两套直角坐标系中的9维卡尔曼滤波,其中的一套滤波用于取代最优检测统计量,完成对目标机动的探测和估计的功能;其二,采用三通道解偶的常增益变采样率自适应滤波。

Based on the previous paper of the author the two methods of simplified adaptive filter for tracking maneuvering target are presented in this paper. One is the two mode of Kalman filter, the other is the constant gain adaptive filter with variable sampling rate which is discussed in detail. Concerning the critical problem of how to change the sampling rate an adapive algorithm equivalent to the optimal test statisics is suggested, which is more reasonable in theory and is more applicable in engineering compared with the methods of cohen and Gardner. The simulation example given in the paper shows that the two methods have the performance comparable to the method suggested by the author previously.