基于脉冲多普勒雷达时域回波的直升机识别算法

A Helicopter Recognition Algorithm Based on Time Domain Echoes of Pulse Doppler Radars

针对窄带雷达不同类直升机的识别问题,本文提出了一种基于时域回波信号的分类方法。首先分析了直升机主旋翼转动的运动模型;然后分析主旋翼奇偶性对桨叶反射信号强度以及间隔的影响;最后根据两类目标回波的不同,提出了桨叶反射回波强度以及间隔等特征对不同直升机的识别。基于实测数据的实验结果表明,所提方法对这两类直升机具有较好的识别效果。

A helicopter recognition algorithm based on time domain echoes is proposed in this paper, which can be used by narrow band radars for recognition of different types of helicopters. Firstly, the motion model for main rotor rotation of helicopters is analyzed. Secondly, influence of the odd and even numbers of main rotors on blade reflected signal strength and interval is analyzed. Finally, a recognition algorithm based on echo characteristics including blade reflected signal strength and interval is proposed. Experiment results prove the good performance of the proposed algorithm in recognition of two types of helicopters.