雷达工程学

FAM和SSCA算法的matlab源程序-detection and identification of signalFAM和SSCA算法的matlab源程序-detection and identification of signalDISCLAIMER NOTICEMTHIS DOCUMENT IS BESTQUALITY AVAILABLE. THECOPY FURNISHED TO DTICCONTAINED A SIGNIFICANTNUMBER OF PAGES WHICH DONOT REPRODUCE LEGIBLY.ilApproved for public release; distribution is unlimitedDETECTION AND IDENTIFICATION OF CYCLOSTATIONARY SIGNALSEvandro luiz da costaLieutenant Commander, brazilian NavyB.S., Instituto Militar de Engenharia, 1980Submitted in partial fulfillmentof the requirements for the degree ofMASTER OF SCIENCE IN ELECTRICAL ENGINEERINGANDMASTER OF SCIENCE IN ENGINEERING ACOUSTICSfrom theNAVAL POSTGRADUATE SCHOOLMarch 1996Author.Evandrodk da costaapproved byRQ求Ralph Hippenstiel, Thesis Co-AdvisorRoberto Cristi, Thesis Ca-AdvisoiHerschel. Loomis, Jr, hairmanDepartment of Electrical and Computer EngineeringArthony A. Atchley / ChairmanEngineering Acoustics Academic CommitteeABSTRACTPropeller noise can be modeled as an amplitude modulated(AM) signalCyclic Spectral Analysis has been used successfully to detect the presence ofanalog and digitally modulated signals in communication systems. It can also identithe type of modulation. Programs for Signal Processing based on compiledlanguages such as FORTRAN or C are not user friendly, and MATLAB basedprograms have become the de facto language and tools for signal processingengineers worldwideThis thesis describes the implementation in mAtlab of two fast methods ofcomputing the Spectral Correlation Density(SCD)Function estimate, the FFTAccumulation Method (FAM)and the Strip Spectral Correlation Algorithm( SSCA),toperform Cyclic Analysis. Both methods are based on the Fast Fourier transformFFT)algorithm. The results are presented and areas of possible enhancement forpropeller noise detection and identification are discussedTABLE OF CONTENTSINTRODUCTIONA MOTIVATION,P,中“····*s···:···:B BACKGROUNDC THESIS GOALSIL NOISE IN THE OCEAN··+A TYPES OF UNDERWATER NOISE25561. Ambient Noise番申2. Self noise3. Radiated noise8B RADIATED NOISE FROM SHIPS, SUBMARINES AND TORPEDOES.......8C PROPELLER NOISE10lI CYCLOSTATIONARY PROCESSING15A CYCLOSTATIONARIT15B THE CYCLIC AUTOCORRELATION FUNCTION (ACF)17C THE SPECTRAL CORRELATION DENSITY FUNCTION (SCD)18N. ESTIMATION OF THE SPECTRAL CORRELATION DENSITY FUNCTION23A FFT ACCUMULATION METHOD(FAM)25B STRIP SPECTRAL CORRELATION ALGORITHM(SSCA■D28V. EXPERIMENTAL RESULTSA. ANALOG-MODULATED SIGNALS311. Amplitude Modulated(AM)Signal===2-312. Pulse-Amplitude Modulated(PAM) Signal58B DIGITAL-MODULATED SIGNALS1. Amplitude Shift Keying(ASK) Signal中中非昏号即即号自唱即自曲音非带卡.最662. Binary-Phase Shift Keying(BPSK) Signal6了VI CONCLUSIONS81A SUMMARY81B SUGGESTIONS82APPENDIX A-CALCULATION OF THE SCD FUNCTION OF AN AMPLITUDE-MODULATED SIGNAL83APPENDIX B-FUNCTION AUTOFAM95APPENDIX C-FUNCTION AUTOSSCA99APPENDIXD-FUNCTION CROSSFAM103APPENDIX E-FUNCTION CROSSSSCA109APPENDIX F-PLOTTING ROUTINES113LIST OF REFERENCES115INITIAL DISTRIBUTION LIST看音117INTRODUCTIONA. MOTIVATIONPropeller related acoustic signatures typically exhibit modulationcharacteristics. These modulation characteristics originate from the cavitationprocess that takes place in the water due to the cyclic movement of the propellerThe cavitation process is basically the collapse of air and vapor bubblesdue to variations in the static pressure. These variations in static pressure are aconsequence of the passage of the propeller blades through the water. Thismovement, cyclic in nature, causes amplitude modulation in the static pressureand as a consequence an amplitude-modulated(AM) signal can be detected in areceiverCyclostationary processing techniques have been used to detect andlentify analog and digital communication signals very successfully. Thesetechniques have the advantage of using a more realistic model for the signalthan the stationary model used in most of the more conventional signalprocessing techniquesB BACKGROUNDThe basic elements of cyclic spectral analysis are the time-variant cyclicperiodogram and the time-variant cyclic correlogram. These two functions form aFourier transform pair. This fact is known as the cyclic Wiener relation or thecyclic Wiener-Khinchin relation [Ref. 1: p. 49.1

本程序结合了OA办公系统+HR人力资源管理系统+CRM客户关系管理系统集合而成。我们把程序设计信息化应用分为三个方面的内容：通用办公应用、业务管理和决策支持。采用现代最新技术，建立一种新概念的、开放的现代管理和办公环境，它以TCP/IP、广域网互连、路由、防火墙和网络管理技术为核心，建立一个安全可靠的网络应用平台。利用最新的ASP.NET平台、javascript和AJAX、SQLSERVER关系型数据库等技术，结合OA思想的独特设计，建立一个开放的信息资源管理平台。利用数据库及分布式处理技术、模块化功能设计，构造信息存储与事务处理平台。该智能办公平台结合了广大机构的信息需求所研发，适用于全

本文全面的介绍了基于matlab的雷达系统的仿真设计！很有参考价值！

opencv 3.4.1 离线帮助文档，解压后直接用浏览器打开index.html

文章路径http://blog.csdn.net/chenluliang/article/details/74943130

RTSP可以运行的源代码包含客户端和服务器端的代码全部VC++编写

数字信号处理 丁玉美 西安电子科技大学出版社

能源与环境成为当今世界所面临的两大重要课题。人类正在努力寻求清洁，高效，可以再生的能源来代替对石油，煤炭等常规能源的依赖。太阳能，风能是洁净资源，对环境不产生污染。所以，开发利用再生能源成为本世纪能源发展战略的基本选择。小型风光互补发电系统就是利用自然能源，解决位于远离电网的地方（草原、边防海岛、山区、牧区等）没有比较稳定电源的问题。风光互补发电控制系统是为了弥补传统电力的不足而设计的独立发电设备。它是由太阳能电池组件与风力发电机配合而成的一个系统，通过微型计算机的远程控制，基本实现了免维护。因为系统中设有单片机工作状态检测、数模转换结果正确与否监测、继电器是否按指令要求动作检测，并对所有检

总结时间序列分析法在故障诊断领域应用的优势，简述了时间系列分析法在故障诊断中的应用方法，并结合几个实例说明其在实际应用中应用领域、诊断方法及过程，分析其发展前景。

在研究工业机器人运动仿真，可以进行交流。matlab 物体 运动 仿真