基于分布式相控阵雷达的目标定位研究

发布时间：2018-07-12 15:12

本文选题：分布式相控阵雷达 + 目标定位　；参考：《电子科技大学》2014年硕士论文

【摘要】：近年来,伴随雷达对抗技术的发展,雷达面对的电磁环境越来越复杂,隐身技术、反辐射导弹、综合电子干扰、低空突防技术也进一步发展,传统雷达已难以对付这些难题。分布式相控阵雷达是在分布式雷达和相控阵雷达的基础上发展而来的新型雷达,具有检测范围广、检测精度高、检测弱小目标等优点,对隐身技术和反辐射导弹有重要对抗作用。而目标定位是雷达测量目标参数中不可缺失的部分,也是检测雷达性能的重要指标。分布式相控阵雷达目标定位是分布式相控阵雷达研究的重要组成之一。本论文以基于分布式相控阵雷达的目标定位技术为主要的研究对象,在深入分析雷达目标定位的基本算法、基于分布式相控阵雷达的系统构成、基于其系统的目标定位空间谱理论的基础上,对目标定位进行了详尽的讨论和研究。主要内容为:1.研究目标定位的方法,针对分布式相控阵雷达的目标定位提出基于MUSIC算法的分布式MUSIC谱估计算法。该算法针对分布式相控阵雷达多个相控阵雷达站点的特殊结构,将各雷达站点接收信号的噪声子空间及其对应的流型矢量融合到同一谱函数中处理。该算法保持了MUSIC算法定位精度高的优点,而且能够实现多目标自动配对,不会出现扫描线不能交于一点的情况,但该算法仍需对待测区域搜索谱峰的位置,计算量较大。2.研究雷达站点数目、站点拓扑结构对目标定位的影响以及和其他雷达目标定位比较。通过理论分析及仿真验证,接收信号的雷达站点至少三部才不会出现影响定位的模糊点。站点布阵形式、站点均匀和非均匀布阵以及布阵面积均对定位精度有影响,仿真验证其影响。在不同维度的空间中,比较分布式雷达基于时差定位、相控阵雷达基于时差-测向联合定位和分布式相控阵雷达的分布式MUSIC谱估计算法定位的定位性能。3.研究雷达站点的重构对目标定位的影响。当环境发生变化或雷达站点损坏时以致当前设置下无法对待测区域目标定位时,需对雷达站点收发重构后再对目标定位。重构分为对各站点接收和发射信号重构和某个或某些站点损毁后对剩余站点的重构,重构后仍可以实现目标定位,仿真验证了该理论的正确性。
[Abstract]:In recent years, with the development of radar countermeasure technology, radar is facing more and more complex electromagnetic environment, stealth technology, anti-radiation missile, integrated electronic jamming, low-altitude penetration technology is also further developed, traditional radar has been difficult to deal with these problems. Distributed phased array radar is a new type of radar developed on the basis of distributed radar and phased array radar. It has important antagonism to stealth technology and anti-radiation missile. Target location is not only an indispensable part of radar measurement parameters, but also an important index to detect radar performance. Target location of distributed phased array radar is one of the important components of distributed phased array radar research. In this paper, the target location technology based on distributed phased array radar is taken as the main research object, and the basic algorithm of radar target location is analyzed in depth, and the system structure of distributed phased array radar is analyzed. Based on the spatial spectrum theory of target location, the target location is discussed and studied in detail. The main content is: 1. The method of target location is studied and a distributed music spectrum estimation algorithm based on music algorithm is proposed for the target location of distributed phased array radar. Aiming at the special structure of multiple phased array radar stations in distributed phased array radar, the noise subspace of each radar station and its corresponding flow pattern vector are fused into the same spectral function. The algorithm maintains the advantages of high localization accuracy of music algorithm, and can realize multi-target automatic pairing without the scan line not crossing one point. However, the algorithm still needs to deal with the location of the peak of search spectrum in the measured region, and the calculation amount is much. 2. The number of radar stations, the influence of site topology on target location and the comparison with other radar target location are studied. Through theoretical analysis and simulation, at least three radar stations receiving the signal will not appear fuzzy points that affect the location. The location accuracy is affected by the form of the station array, the uniform and non-uniform array of stations and the area of the array, which is verified by simulation. In the space of different dimensions, the localization performance of distributed music spectrum estimation algorithm is compared between distributed radar based on time difference localization, phased array radar based on combined time difference and direction finding and distributed phased array radar with distributed music spectrum estimation algorithm. The effect of radar station reconstruction on target location is studied. When the environment changes or the radar station is damaged, it is necessary to reconstruct the radar station and then locate the target after it is unable to deal with the target location of the measured area under the current setting. The reconstruction can be divided into the reconstruction of the received and transmitted signals of each station and the reconstruction of the remaining sites after one or some stations are destroyed. After the reconstruction, the target location can still be realized. The simulation results show that the theory is correct.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN958.92

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