双脉冲激光三维微多普勒相干探测研究

项目名称： 双脉冲激光三维微多普勒相干探测研究

项目编号： No.61308054

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 无线电电子学、电信技术

项目作者： 张海洋

作者单位： 北京理工大学

项目金额： 24万元

中文摘要： 近几年来,微多普勒信息的应用已被认为是一种非常具有潜在优势的技术手段。目标的微多普勒特性反映了目标的激光散射特性、几何结构和运动特征，为雷达目标特征提取和目标识别提供了新的途径。传统微多普勒探测系统大多数采用连续激光和单点探测器，只能探测目标的一维距离向微多普勒信息，难以克服信息量有限和探测距离近的弊端，但是随着面阵传感器技术以及新型激光器技术的发展，使得微多普勒激光雷达探测技术也迎来新的发展，脉冲相干三维微多普勒成像方面的研究也逐渐成为新的热点。本申请以运动目标高分辨探测识别为应用背景，采用基于单频双脉冲激光源的相干探测体制，利用探测器阵列作为接收装置，结合时频分析算法，实现对动目标的方位向和距离向的三维微多普勒成像，克服了传统连续激光单点探测信息量有限和探测距离较近的弊端，为探索高分辨的新体制激光雷达提供了理论和实验基础。

中文关键词： 微多普勒；双脉冲激光；微动特性；目标识别；

英文摘要： Micro-doppler effect introduced in laser systems has received more and more intense interest, due to their applications in target feature extraction and recognition in laserradar system. Micro-doppler effect of an object or structures on the object reflects laser scattering characteristics, geometric structure and motion feature. People paid more attentions on the applications of Range micro-Doppler signature in past years. However, with the development of the technology of APD focal plane array and new laser source, the technology of micro-doppler laser radar detection also meets a new development. Moreover, 3-D micro-doppler imaging will gradually instead of Range micro-doppler signature and become a new hotspot.We propose to implement 3-D micro-doppler imaging with the detector array and dual pulsed laser source by the coherent detection mode. Micro-doppler imaging algorithm including joint Time-Frequency analysis is also needed for this laser radar detection technology. The new application of 3-D micro-doppler imaging will contribute a lot to explore a new system of high resolution laser radar by providing theoretical and experimental basis.

英文关键词： micro Doppler；dual-pulse laser；fretting characteristic；target recognition；