基于多精度复合阵列天线的数字波束雷达关键技术研究

In order to improve the ability of emergency fast handling in public area, our country needs a low cost new radar system with all-weather multi-target detection ability. The Multi-Resolution Composite Array (MRCA) which is proposed by applicant is a new sparse array technology which could achieve narrow beam and low sidelobe with a few antenna elements. However, multi-target interference happens when apply MRCA in Digital beamforming (DBF) radar for detecting multi-target in wide angle. It severely affects the spread and application of MRCA technology. This project will focus on the problem of applying MRCA in DBF radar, try to offset the effect of multi-target interference when applying MRCA in wide angle detection DBF radar and realize the optimum design of MRCA in the application background of security radar. Firstly, research the adaptive target identification technology for MRCA DBF radar to solve the multi-target interference which happens while wide scanning angle with MRCA. Secondly, based on Particle Swarm Optimizer (PSO) algorithm, research the fast adaptive target identification technology for the MRCA DBF radar. Lastly, based on PSO algorithm, research the optimize design method for MRCA to reduce the array element as more as possible. The research of this project could improve the theory of sparse array radar based on MRCA and help to popularize DBF radar technology in China's public security area.

为提高公共场所突发事件的快速处理能力，我国急需一种具有全天候多目标精确定位能力的低成本新装备。多精度复合阵列天线(MRCA)是一种能用少量天线单元形成低副瓣、窄波束的稀布阵列天线新技术，然而MRCA在数字波束雷达应用中的宽角度多目标互扰问题严重制约了该技术的实际应用与推广。本课题拟解决MRCA在宽扫描角数字波束雷达应用中的多目标互扰问题和实现在安保雷达应用背景下的优化设计。首先，研究适用于MRCA数字波束雷达的自适应目标分辨技术，解决MRCA固有的宽角度扫描时多目标互扰问题；其次，结合粒子群进化算法（PSO）优化算法，研究基于MRCA的数字波束雷达架构下的自适应多目标快速分辨方法；最后，针对公共场所安保应用背景，研究基于PSO算法的MRCA优化设计方法，使实际使用的阵元最少。本课题的研究能完善基于MRCA的稀布阵列天线雷达理论，更好的发挥数字波束雷达技术在我国公共安全领域的作用。

目前我国正处于经济和社会发展转型期，生产力水平很不平衡，公共安全保障基础薄弱，与经济高速发展的矛盾越来越突出。针对公共场所安防应用背景，研究基于多精度复合阵列天线（Multi-Resolution Composite Array，MRCA）的数字波束雷达相关技术，能够降低数字波束雷达设备成本，重量，系统复杂度和能耗，对于数字波束雷达在民用领域的推广有着十分重要的意义。.本课题开展基于多精度复合阵列天线的数字波束雷达关键技术研究，解决MRCA在宽角度扫描中的多目标互扰问题，结合PSO优化算法提出MRCA雷达系统多目标快速分辨方法并优化MRCA阵列结构。目的在于完善MRCA稀布阵列天线理论模型和基于MRCA的数字波束雷达理论，为民用低成本数字波束雷达技术的研究提供新的思路。.本课题研究了基于MRCA的数字波束雷达在宽角度多目标侦测时假目标的产生机理，提出能够分辨真假目标的自适应数字波束成型方法，完善了基于MRCA的数字波束雷达理论。将自适应真假目标分辨方法与实时PSO优化算法相结合，研究了适合MRCA数字波束雷达的自适应真假目标快速分辨优化算法，完善了MRCA稀布阵列天线理论模型。并且根据PSO优化算法要求，调整原有MRCA设计流程，研究特定指标下的MRCA最优化设计方法，完善了MRCA稀布阵列天线设计方法。共发表相关学术论文4篇，形成了青年教师为主的研究团队，培养研究生6名。