《基于MATLAB的和差脉冲测角的研究和仿真》-毕业论文（设计）.doc

摘 要 测角即是测定目标的俯仰角和方位角，它是目标定向、精确制导的重要组成部分。和差单脉冲测角由于其快速性、精确性而获得了广泛应用。运用信号处理理论与MATLAB仿真软件相结合的思想进行测角仿真，不仅能够提供方便快捷的运算，还能获得很好的精确度。 本文首先建立了仿真信号模型，分析了天线方向图，仿真得到了二维和三维的天线和差波束方向图；其次对几种常见的测角方法、单脉冲系统的实现形式进行了介绍；最后综合前几章的内容，在不同环境条件下对系统进行了测试分析。得到了目标的角度误差曲线。 关键词：和差波束，测角，雷达信号，天线方向图 ABSTRACT Angle measurement is to measure the azimuth and elevation angle of the detected targets, it’s a crucial part of target direction-finding and precision guiding. Sum and difference monopulse radar is widely used for its short information acquisition time and high angle measurement precision. The combination of signal processing theory and MATLAB simulation software can produce efficient operation as well as good accuracy. Firstly, this dissertation studies the model of signal environment, analyzes the radar antenna model, and simulates the 2-D and 3-D sum and difference antenna patterns. Secondly, several commonly used target angle-tracking methods as well as realization of monopulse system is introduced. Finally, tests are carried out on the system in presence of different errors and error curve is obtained. Keywords: sum and difference beam, angle measurement, radar signal,antenna pattern 目录 TOC \o 1-4 \h \z \u HYPERLINK \l _Toc296027677 第一章 引言 PAGEREF _Toc296027677 \h 1 HYPERLINK \l _Toc296027678 1.1课题背景 PAGEREF _Toc296027678 \h 1 HYPERLINK \l _Toc296027679 1.2 MATLAB在信号处理中的应用 PAGEREF _Toc296027679 \h 1 HYPERLINK \l _Toc296027680 1.3 主要工作及章节安排 PAGEREF _Toc296027680 \h 2 HYPERLINK \l _Toc296027681 第二章 信号环境的建模与仿真 PAGEREF _Toc296027681 \h 3 HYPERLINK \l _Toc296027682 2.1 角度测量处理模型 PAGEREF _Toc296027682 \h 3 HYPERLINK \l _Toc296027683 2.2 常用雷达信号 PAGEREF _Toc296027683 \h 3 HYPERLINK \l _Toc296027684 2.2.1 线性调频信号 PAGEREF _Toc296027684 \h 3 HYPERLINK \l _Toc296027685 2.2.2 相位编码信号 PAGEREF _Toc296027685 \h 5 HYPERLINK \l _Toc296027686 2.3 回波信号 PAGEREF _Toc296027686 \h 6 HYPERLINK \l _Toc296027687 2.4 噪声及杂波信号 PAGEREF _Toc296027687 \h 8 HYPERLINK \l _Toc296027688 2.4.1 雷达目标噪声 PAGE