双基MIMO雷达波形与探测跟踪能力仿真研究

发布时间：2018-08-26 18:19

【摘要】：双基MIMO雷达是一种收发站分开放置的MIMO雷达,它不仅结合了双基地雷达和MIMO雷达的特点,具有抗干扰能力强,目标测量、定位精度高,射频隐身性能好等优点,同时还弥补了二者的不足。因此,如何利用双基MIMO雷达的优势来实现精准的目标跟踪定位极具研究价值。不同正交波形的应用,使得双基MIMO雷达表现出不同的性能特点。研究正交波形的模糊特性,分析其对雷达参数测量的影响,对双基MIMO雷达系统设计具有重要的参考意义。本文针对制导雷达应用背景,研究双基地MIMO雷达的正交波形特性及其应用特点,分析双基地MIMO雷达探测跟踪能力和目标跟踪性能,并开展相应的仿真研究。主要内容有以下几点:1、根据双基MIMO雷达的几何配置,推导了静止目标和运动目标的信号回波模型;分别介绍了三类正交信号的定义及其构成原理;给出了双基MIMO雷达模糊函数的定义。2、借助双基地MIMO雷达模糊函数定义,分别推导了步进频分线性调频信号、正交相位编码信号、正交相位编码-线性调频混合信号的模糊函数,对比分析了正交相位编码-线性调频混合信号在目标跟踪能力以及抗截获性上的优势。3、介绍了双基MIMO目标跟踪定位中的基本理论与算法,并以此为基础搭建了双基MIMO雷达仿真系统,并对仿真系统中的主要模块进行了说明。围绕目标跟踪进行了系统仿真,且在同等条件下,对比分析了MIMO雷达与相控阵雷达的跟踪性能;仿真结果表明,脉冲积累可以减小系统的定位误差。对前述三种正交信号的目标跟踪能力进行了仿真分析,结果表明,正交相位编码-线性调频混合信号的定位跟踪精度最高。
[Abstract]:Bistatic MIMO radar is a kind of MIMO radar with separate transceiver stations. It not only combines the characteristics of bistatic radar and MIMO radar, but also has the advantages of strong anti-jamming ability, high target measurement, high positioning accuracy, good RF stealth performance, etc. At the same time, it also makes up for the deficiency of both. Therefore, how to use the advantages of bistatic MIMO radar to achieve accurate target tracking and positioning is of great value. The application of different orthogonal waveforms makes bistatic MIMO radar have different performance characteristics. To study the fuzzy characteristics of orthogonal waveform and analyze its influence on radar parameter measurement is of great significance for the design of bistatic MIMO radar system. In this paper, the orthogonal waveform characteristics of bistatic MIMO radar and its application characteristics are studied. The detection and tracking ability and target tracking performance of bistatic MIMO radar are analyzed, and the corresponding simulation research is carried out. The main contents are as follows: 1. According to the geometric configuration of bistatic MIMO radar, the signal echo models of stationary and moving targets are derived, and the definitions and principles of three kinds of orthogonal signals are introduced respectively. The definition of ambiguity function of bistatic MIMO radar is given. With the help of the definition of blur function of bistatic MIMO radar, the ambiguity functions of step frequency division linear frequency modulation signal, orthogonal phase coding and linear frequency modulation mixed signal are derived respectively. The advantages of orthogonal phase code-LFM mixed signal in target tracking and anti-interception are analyzed. The basic theory and algorithm of bistatic MIMO target tracking and location are introduced. Based on this, a bistatic MIMO radar simulation system is built, and the main modules of the simulation system are described. The tracking performance of MIMO radar and phased array radar is compared and analyzed under the same conditions, and the simulation results show that pulse accumulation can reduce the positioning error of the system. The target tracking capability of the three orthogonal signals mentioned above is simulated and analyzed. The results show that the tracking accuracy of the quadrature phase code-linear frequency modulation mixed signal is the highest.
【学位授予单位】：电子科技大学
【学位级别】：硕士
【学位授予年份】：2017
【分类号】：TN958

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