【作者】 徐立；

【导师】 郭伟；

【作者基本信息】 华中科技大学 ， 电磁场与微波技术， 2005， 硕士

【摘要】 本文结合研制毫米波无源探测信号处理系统的课题需要,研究了8mm 辐射计仿真输出信号在时域及小波变换后的信号特征,讨论了无源探测信号处理系统的各组件的设计思想、方法,以及它们的设计、测试。并且详细说明了实现方法和注意事项。全文共分为四章。第一章较为细致的介绍了毫米波无源探测的特点、国内外毫米波无源探测的发展情况、毫米波无源探测的关键技术及发展趋势,并阐明了本研究工作的目的与任务; 第二章总结了毫米波无源探测的基本理论和概念,对不同目标的微波辐射特性进行了简明的介绍; 第三章主要介绍了运用小波变换对毫米波无源探测信号进行分析,包括小波变换基本理论的介绍,运用小波变换的目标识别过程以及结果分析说明; 第四章则完整的讨论了毫米波无源探测信号处理系统的从系统设计到电路实现的过程,包括系统实现功能的确定,电路组成,滤波器算法设计及单片机程序编写,并介绍了MSP430 系列单片机的特点及数字滤波器的设计思想。最后,在结束语中,总结了作者在本课题任务中所进行的工作,并提出了一些建议。更多还原

【Abstract】 In this article, after deep researching on simulation signal characterizations of 8mm radiometer output signal in time domain and after wavelet transform, the author tries to interpret the design theory, thoughts, methods and tests of the passive detection signal process system. The author also gives the detail regard in the design and testing course. This article is divided into four chapters. The first chapter explains the characteristics of millimeter wave passive detection, as well as the domestic and international research developments, the key technologies and the developing trends. The author also introduces the objective and mission of the project. The second chapter summarizes the basic theories of millimeter wave passive detection and gives some datum of measuring some specific targets. The third chapter mainly introduces the using of wavelet transform to the analysis of millimeter wave passive detection signals, including the basic theory of wavelet transform, the process of target identification and analysis of the results. The fourth chapter discusses the design course of signal process system of millimeter wave passive detection from the system design to the implement of circuits, including the function of system, the system structure, the filter algorithm and the program of the microcontroller. The characteristics of the microcontroller and the design thoughts of the digital filter are mentioned. At last the author summarizes the work that has been done in this project and gives some suggestions.更多还原