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FAM和SSCA算法的matlab源程序-detection and identification of signal
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
- 2020-12-05下载
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近景摄影测量-直接线性变换算法（DLT）含数据
本算法根据近景摄影测量中的直接线性变换（DLT算法）写成，内含有两个版本的数据以供试验，注释清晰，运行正常。
- 2020-12-02下载
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mean shift segmentation
在国外大学的网页上下载的，mean shift用于分割，分类图像。大家都知道 mean shift算法的应用领域是很广泛的，在跟踪，分割方面效果还是不错的。所以嘛，下载看看喽！
- 2020-11-29下载
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哈希表设计 针对某个集体（比如你所在的班级）中的“人名”设计一个哈希表，使得平均查找长度不超过R，完成相应的建表和查表程序。
采用除留余数法构建哈希表，伪散列解决冲突 内有实验报告，通过vc++测试，我们小组做这个得了满分！
- 2020-06-17下载
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Matlab读取ENVI标准格式代码
本程序是MATLAB语言写的，功能是能自动根据envi标准影像的.hdr文件进行读取并显示
- 2020-12-11下载
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Swerling检测概率
针对Swerling 0~4型目标，采用平方律检波后N个数据非相参积累的信号处理结构，设系统的虚警率为Pf=10-6，信噪比范围为-10dB-25dB，分别画出N=1,10,100,1000时，五种目标的检测概率随信噪比变化的曲线。(不同N的情况下，五条曲线画在一张图中)
- 2020-12-04下载
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Visual C++ +SQL Server数据库应用实例完全解析配套光盘
Visual C++ +SQL Server数据库应用实例完全解析首先详尽介绍了使用Visual C++和SQL Server开发数据库应用程序应具备的各项技术,然后详细介绍了7个流行的系统的开发实例。在本书光盘中还为每个实例制作了PPT文件,详细介绍和演示实例所需的实用技术和开发过程,方便读者学习使用。本书案例贴近实际,内容精炼,适合大中专院校的学生和软件开发人员参考使用。图书目录：第1章 数据库编程实用技术 11.1 SQL Server数据库管理 11.1.1 企业管理器 11.1.2 创建数据库 21.1.3 创建表 21.1.4 创建视图 51.1.5 备份和
- 2020-06-26下载
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项目投标书PPT模板（IT项目）
技术优势分析设备优势分析人力优势分析管理优势分析资源优势分析其他优势分析
- 2020-12-02下载
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人工智能 12硬币程序和报告 AO*算法 图优先搜索
人工智能课程作业资源包，包含了12硬币（12coins）源程序和README文档，而且包含了上课时用需要演讲使用的PPT幻灯片，还有两篇关于12硬币的论文可以参考阅读。12硬币问题的描述：有12个硬币，已知有一个是不标准的(不能确定是轻还是重)，要求使用天平最多3次，找出那个不标准的硬币，并确定是轻的还是重的。
- 2020-12-05下载
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opencv实现多角度重建
根据多角度拍摄图像进行三维重构 能得出三维模型
- 2020-12-02下载
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