相参脉冲序列PRI变化率的高精度估计方法

An Accurate Estimation for PRI Rate-of-Change with the Coherent Pulse Train

在单站无源定位与跟踪系统中,PRI变化率信息反映了运动目标的径向加速度信息。提出了一种新的PRI变化率估计的算法,利用脉冲载频之间的相参积累,使信噪比得到提高,通过群延迟,使PRI的变化量得到积累,推导出一种快速而精确测量PRI变化率的算法,数值仿真证明使用该算法可以精确快速地估计信号中的PRI变化率信息。

The PRI rate-of-change reflects the information of target＇ s acceleration in the single observer passive location and tracking system. A novel PRI rate-of-change estimation algorithm for the coherent pulse train is developed. By exploiting the coherent property of pulse train, the SNR is improved. By group delay the change of PRI is accumulated. The simulation results prove that the proposed algorithm is feasible and efficient.