【作者】 魏永豪；

【导师】 袁晓；

【作者基本信息】 四川大学 ， 信号与信息处理， 2006， 硕士

【摘要】 计算机技术的发展促进了建模和仿真技术的迅速发展，使仿真技术成为一门独立学科得到日益发展。由于计算机仿真技术具有经济、灵活、高效等优点，已广泛应用于科学研究和工程技术等各种实际应用领域中。在电子对抗领域，用计算机仿真研究雷达干扰与抗干扰性能就是一个典型的应用。 近年来，已有人采用Matlab，SPW等工具对脉冲多普勒雷达系统进行建模和仿真，为克服这些专业工具在通用性、移植性和兼容性等方面的限制，本文采用MicroSoft VC++6.0编程语言对脉冲多普勒雷达系统进行计算机仿真。雷达系统可以分为信号环境、接收机信号处理和数据处理三个部分，本文主要完成信号环境和接收机信号处理中若干模块的建模仿真工作，实现了高重频工作模式下搜索和跟踪信号处理流程的仿真。 信号环境部分，对仿真坐标系、目标回波、热噪声进行建模和仿真，给出杂波的主要形式，详细介绍了坐标系中的目标参数获取和信号建模中需要用到的随机变量生成算法，包括常用的四种截面积起伏的斯威林模型。接收机信号处理部分，对增益控制、正交相干检波、脉冲压缩、杂波处理、多普勒滤波、恒虚警处理、解距离速度模糊、单脉冲测角等模块的原理和方法进行介绍分析，给出接收机处理和信号处理的框图，重点总结了正交相干检波的各种方法、基本原理和适用条件，并给出了仿真结果。 建立雷达系统的各个模块后，对整个雷达系统的高重频工作模式进行了仿真测试，表明该系统能够有效地抑制杂波、检测目标。更多还原

【Abstract】 The development of computer technology advances the modeling and the technology of simulation, which make the computer simulation develop increasingly as an independent knowledge. Due to its economy, flexibility and hign efficiency, it’s used widely in many kinds of research and engineering domain. In the field of Electronic Counter Measures (ECM), the model for researching the pulse Doppler (PD) radar’s system, jamming and anti-jamming is the typical application.In recent years, the modeling and simulation of PD radar’s system using Matlab, SPW are implemented, with the restriction of portability, compatibility, so we adopt Microsoft VC++6.0 as the simulation language to solve these problems. The whole system consists of signal environment, receiver and signal processing and data processing, and this thesis mainly discusses the model of the first two parts.In the signal environment part, reference frame set, the echo of targets, system noise are modeled and simulated; the main forms of clutter are given. Coordinates, target parameter calculation and generation algorithm of commonly used random variables are discussed in detail, including four kinds of Swerling models. In the receiver and signal processing part, basic modules are introduced and analyzed, such as gain control, quadrature coherent detection, pulse compression, clutter processing, doppler filtering, constant false alarm rate (CFAR), range and velocity ambiguity solution, monopulse measure of angle error, and their diagrams are given. Commonly used methods of quadrature coherent detection are summarized, as well as their更多还原