基于相位编码的MIMO雷达的信号处理研究

发布时间：2018-04-25 23:03

本文选题：MIMO雷达 + 相位编码　；参考：《南京理工大学》2014年硕士论文

【摘要】：MIMO雷达系统是一种崭新的雷达系统体制,是传统相控阵雷达的进一步发展。传统相控阵雷达的发射信号在空间范围内形成的是高增益的波束,而MIMO雷达是将发射阵面分成若干个子阵,各个子阵元发射的波形是相互正交的,从而在空间构成低增益的宽波束。这种新型体制雷达带来了很多性能上的改善,如可以提高雷达的抗截获能力,可提高雷达对目标的速度分辨率,可提高低速目标的检测能力等。本文主要研究了MIMO雷达的相位编码设计以及它的信号处理等。首先研究了MIMO雷达的基本原理及其相关特点,并对MIMO雷达的一些性能指标进行了详细的分析；其次分析了多普勒频率对于相位编码MIMO雷达信号处理的影响,并以m序列为例进行了多普勒补偿算法；然后研究了MIMO雷达信号处理的原理,系统论述了信号处理的实现过程,包括匹配滤波技术,波束形成技术,目标检测技术和恒虚警率检测技术,同时全面分析了匹配滤波和波束形成的不同处理顺序对计算复杂度的影响；最后详细介绍了MIMO雷达仿真实验平台的搭建过程,并且讨论了各个模块的实现流程,通过仿真平台给出了MIMO雷达的一些仿真结果。
[Abstract]:MIMO radar system is a new radar system system, which is the further development of traditional phased array radar. The transmitting signal of traditional phased array radar is a high gain beam in the space range, while the MIMO radar divides the transmitting array surface into several sub-arrays, and the waveforms transmitted by each sub-array element are orthogonal to each other. Thus, a wide beam with low gain is formed in space. This new radar system has brought many improvements in performance, such as improving the ability of radar to resist interception, improving the speed resolution of radar to target, and improving the detection ability of low speed target, etc. In this paper, the phase coding design of MIMO radar and its signal processing are studied. Firstly, the basic principle and related characteristics of MIMO radar are studied, and some performance indexes of MIMO radar are analyzed in detail. Secondly, the influence of Doppler frequency on the signal processing of phase-coded MIMO radar is analyzed. Then the principle of MIMO radar signal processing is studied, and the realization process of signal processing is discussed systematically, including matched filtering technology, beamforming technology. Target detection technology and constant false alarm rate detection technology. At the same time, the influence of different processing order of matched filtering and beamforming on computational complexity is analyzed. Finally, the process of building MIMO radar simulation experimental platform is introduced in detail. The realization flow of each module is discussed, and some simulation results of MIMO radar are given through the simulation platform.
【学位授予单位】：南京理工大学
【学位级别】：硕士
【学位授予年份】：2014
【分类号】：TN957.51

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