红外与激光工程, 2016, 45 (7): 0726006, 网络出版: 2016-08-18   

基于目标波形模型的多脉冲激光雷达目标信号模拟

Multi-pulse laser radar target signal simulation based on target echo waveform model
作者单位
1 北京工业大学 电控学院, 北京 100124
2 郑州航空工业管理学院 电子通信工程学院, 河南 郑州 450015
3 中航工业集团公司洛阳电光设备研究所, 河南 洛阳 471000
摘要
多脉冲激光雷达发射数个至数百个高重频激光照射目标, 利用多脉冲回波累加实现信号积累。多脉冲激光目标检测性能的验证需要基于目标回波波形模型的动态目标信号模拟。脉冲激光目标回波波形可以由激光发射、信道传播、目标反射等环节之间的卷积传递关系加以建模。文中首先通过建立各环节的数学描述得到了回波波形的连续卷积模型。接着, 针对积分解析模型不利于工程实现的问题, 基于发射脉冲距离分辨单元提出了离散算法实现特定外形目标激光回波波形序列的直接计算。结合远程飞机目标的回波信号仿真, 指出了回波波形与目标特性的内在联系, 并通过实验进行了可信性验证。最后, 应用文中模型及方法给出了多脉冲激光雷达动态目标模拟器的研制实现, 为开展多脉冲激光目标检测研究提供必要的验证测试条件。
Abstract
Multi-pulse laser radar emits hundreds of high repetition frequency laser echo to accumulate, and needs dynamic target signal simulation to verify the detection performance based on target echo waveform model. Pulse laser echo waveform can be modeled through the convolution relationship among the laser emission, channel propagation and target reflection. Firstly, the mathematical descriptions of each component part were established, and the echo waveform model was given by continuous convolution. Then, for the problem that the analytical model was not conducive to the engineering implementation, the discrete algorithm of target echo waveform sequence was presented based on transmitted pulse range resolution. According to the echo signal simulation of long-range aircraft target, the intrinsic relationship between the echo waveform and the target characteristic was pointed out, and the reliability was verified by the experiment. Finally, the development and implementation of the multi-pulse laser radar dynamic target simulator was presented, which provided the necessary verification test conditions for the research of multi-pulse laser target detection.

孙俊灵, 马鹏阁, 孙光民, 金秋春, 羊毅. 基于目标波形模型的多脉冲激光雷达目标信号模拟[J]. 红外与激光工程, 2016, 45(7): 0726006. Sun Junling, Ma Pengge, Sun Guangmin, Jin Qiuchun, Yang Yi. Multi-pulse laser radar target signal simulation based on target echo waveform model[J]. Infrared and Laser Engineering, 2016, 45(7): 0726006.

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