脉冲多普勒雷达距离拖引目标序贯滤波跟踪方法

Sequential filtering algorithm for RGPO target tracking in pulse Doppler radar

建立一个包含欺骗过程参数的滤波模型,在估计目标状态的同时,对目标距离拖引欺骗的相关参数进行估计。用一个递归滤波器估计回波平均功率,并计算真实回波和欺骗回波的检测概率,用于相关计算和欺骗终止判断。用2D方法实现测量值与真实回波和欺骗回波预测位置的关联判断,对相关上的回波使用序贯滤波的方法对目标状态进行估计。仿真结果表明,本方法能够有效地利用欺骗回波,不仅能稳定地跟踪目标,而且可以获得较高的目标位置估计精度。

A model consisting of deception parameters is presented to estimate the states of target as well as the states of range gate pull-off （RGPO） in pulse Doppler radar. The average power of both true skin and deception echo is estimated recursively to calculate the detection probabilities which are used in 2D assignment and RGPO breaking-off judgment. The measurements associated with the prediction position of the true target skin and RGPO echoes are used to update the state of target in sequence. Simulations are made to compare the proposed algorithm with conventional single target tracking algorithm. The results show that this algorithm can take advantage of the measurements of deception echoes to track the target steadily with high accuracy in the presence of RGPO.