单兵雷达是一种用于战场探测近距离军事目标和获取战场信息的重要侦察设备。因为单兵雷达系统的外场模拟环境单一、试验次数有限且实验结果不全面，所以对其进行仿真研究，可以高效地为单兵雷达的设计方式、分析论证提供重要理论基础。单兵雷达要兼顾性能与便携，因此需要整个雷达系统结构简单、体积小、灵活性强。根据其功能特点，将具有发射功率低、无距离盲区、易于小型化等优点的线性调频连续波（Linear Frequency Modulation Continuous Wave，LFMCW）体制应用于单兵雷达系统中。所以，本文通过计算机进行全数字化的仿真，利用MATLAB软件，实现了多周期的三角LFMCW单兵雷达系统在复杂电磁环境下的建模和仿真工作。

本文基于LFMCW雷达的工作原理，结合雷达仿真系统模块化思想，提出单兵雷达仿真系统的总体设计方案。首先建立单兵雷达仿真系统模型库，然后调用各个模型，完成仿真系统的搭建。其次，对各模型（发射机、天线、接收机、环境回波、信号处理和数据处理）建立仿真数学表达式，并详细阐述了各模型的基本原理和建模方法，对这些模型进行了仿真实验，它们均通过样例的参数测试验证。再次依据所建立的仿真模型，基于灵活性、可拓展性以及封装性原则，在MATLAB开发平台上完成单兵雷达系统开发，并建立仿真系统显控平台，实现了系统参数的可视化设置和跟踪结果的直观显示，最后对不同复杂电磁环境下的多目标参数测量、跟踪功能进行仿真分析，仿真结果验证了该系统建模的正确性和有效性。

本文使用标准化、模块化的雷达仿真系统建模思想对单兵雷达系统进行实现，一方面利于以后工作的维护和移植，另一方面便于雷达系统的二次开发。通过对单兵雷达系统的建模与仿真，可以为整个单兵雷达作战的分析评估提供可靠的平台和依据，符合设计要求，在工程应用上具有重要的价值。

Individual radar is an important reconnaissance equipment used to detect military targets and obtain battlefield information. Because the field simulation environment of individual radar system is single, the number of tests is limited and the experimental results are not comprehensive, the simulation research on it can provide an important theoretical basis for the design and analysis of individual radar system efficiently. Individual radar needs to give consideration to both performance and portability, so the whole radar system needs to be simple in structure, small in size and flexible. According to its functions and characteristics, the Linear Frequency Modulation Continuous Wave (LFMCW) system, which has the advantages of low transmitting power, no distance blind area and easy miniaturization, is applied to the individual radar system. Therefore, in this thesis, the modeling and simulation work of multi-period triangular LFMCW radar system in complex electromagnetic environment is realized through computer simulation and MATLAB software.

Based on the working principle of LFMCW radar and combined with the modularization idea of radar simulation system, the overall design scheme of individual radar simulation system is proposed in this thesis. Firstly, the model library of radar simulation system is established, and then each model is called to complete the construction of the simulation system. Secondly, the mathematical expressions of each model (transmitter, antenna, receiver, environmental echo, signal processing and data processing) are established, and the basic principles and modeling methods of each model are described in detail. Simulation experiments are carried out on these models, and they are verified by the parameter test of the sample. Thirdly, based on the established simulation model and the principle of flexibility, extensibility and encapsulation, the development of individual radar system is completed on the MATLAB development platform, and the simulation system display and control platform is established to realize the visual setting of system parameters and the intuitive display of tracking results. Finally, the multi-target parameter measurement and tracking function in different complex electromagnetic environments are simulated and analyzed, and the simulation results verify the correctness and effectiveness of the system modeling.

In this thesis, the idea of standardized and modular radar simulation system modeling is used to realize the individual radar system, which is beneficial to the maintenance and transplantation of the future work on the one hand and the secondary development of the radar system on the other hand. Through the modeling and simulation of individual radar system, it can provide a reliable platform and basis for the analysis and evaluation of the entire individual radar operation, which meets the design requirements and has important value in engineering application.

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