基于目标波形模型的多脉冲激光雷达目标信号模拟

发布时间：2019-08-12 16:44

【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]:The multi-pulse laser radar transmits several to hundreds of high-frequency laser irradiation targets, and the multi-pulse echo accumulation is used to realize the accumulation of signals. The verification of multi-pulse laser target detection performance requires a dynamic target signal simulation based on the target echo waveform model. The pulse laser target echo waveform can be modeled by a convolution transfer relationship between laser emission, channel propagation, target reflection, and the like. In this paper, the continuous convolution model of the echo waveform is obtained by establishing the mathematical description of each link. Then, aiming at the problem that the integral analytic model is not good for engineering realization, a discrete algorithm is proposed to realize the direct calculation of the laser echo waveform sequence of the specific shape target based on the emission pulse distance resolving unit. Combined with the echo signal simulation of the remote aircraft target, the internal relation between the echo waveform and the target characteristic is pointed out, and the credibility verification is carried out by the experiment. Finally, the development and implementation of the multi-pulse laser radar dynamic target simulator are given in the application text, and the necessary verification test conditions are provided for the multi-pulse laser target detection research.
【作者单位】：北京工业大学电控学院;郑州航空工业管理学院电子通信工程学院;中航工业集团公司洛阳电光设备研究所;
【基金】：国家自然科学基金重点项目(61331021) 航空科学基金重点项目(2014ZC13004) 河南省高校青年骨干教师资助计划(GGJS-140)
【分类号】：TN958.98

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