Description: 本书的目的主要是向读者展示傅里叶分析和小波的许多基础知识以及在信号分析方面的应用。全书分为8章和2个附录，前言部分是学习第1章至第7章的准备知识，即内积空间；第1章讲解傅里叶系列的基础知识；第2章讲解傅里叶变换；第3章介绍离散傅里叶变换以及快速傅里叶变换；第4章至第7章讨论小波，重点在于正交小波的构建；附录部分则介绍稍微复杂的一些技术主题以及演示概念或产生图形的MATLAB代码。许多关于小波的文章和参考书籍均要求读者具有复杂的数学背景知识，本书则只要求学生具有较好的微积分以及线性代数知识，通俗易懂，是数学、计算机、电子、通信、地质、医学、机械等专业高年级本科生及研究生的基础教科书，也可作为相关技术人员的参考书。-The main purpose of this book is to show readers Fourier and wavelet analysis of many of the basic knowledge as well as in signal analysis applications. The topics are divided into eight chapters and two appendices, is to learn from the preamble of Chapter 1 to Chapter 7 of the preparation of knowledge, that is, inner product space Chapter 1 on the basis of Fourier series of knowledge Chapter 2 on Fourier Transform Chapter 3 introduced the Discrete Fourier Transform and Fast Fourier Transform Chapter 4 to Chapter 7 to discuss wavelet, with emphasis on construction of orthogonal wavelet appendix describes slightly complex themes, as well as a number of technical concepts or produce demo MATLAB graphics code Platform: |
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Author:刘宏 |
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Description: 1．通过实验加深对快速傅立叶变换（FFT）基本原理的理解。
2．了解FFT点数与频谱分辨率的关系，以及两种加长序列FFT与原序列FFT的关系。
离散傅里叶变换（DFT）和卷积是信号处理中两个最基本也是最常用的运算，它们涉及到信号与系统的分析与综合这一广泛的信号处理领域。实际上卷积与DFT之间有着互通的联系：卷积可化为DFT来实现，其它的许多算法，如相关、滤波和谱估计等都可化为DFT来实现，DFT也可化为卷积来实现。-1. Deepen the experimental fast Fourier transform (FFT) the basic tenets of understanding. 2. Understand the FFT spectrum and points of the resolution, and two extended sequence with the original FFT FFT relations. Discrete Fourier Transform (DFT) and the convolution of two signal processing is the most commonly used basic arithmetic, they relate to the signal and system analysis and synthesis of the wide range of signal processing field. DFT actually convolution and interoperability between contact : DFT into convolution can be achieved in many other algorithms, If relevant, filtering and spectral estimation could be achieved as DFT, DFT into convolution can be achieved. Platform: |
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Author:深蓝 |
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Description: 实验内容：
1．求下列3个模板的频率响应，并显示其三维图形；选择一幅图
像，利用这3个模板分别对该图像进行卷积运算，将卷积运算
获得的图像与原始图像进行比较，说明各模板的类型以及模板
（b）、（c）的区别与联系。
2. 选择一幅图像，对其进行离散Fourier变换，仅利用其相位谱重构原图像，然后仅利用其振幅谱重构原图像，比较实验结果；
选择两幅不同类型的图像，分别进行Fourier变换，交换二者的相位谱后求Fourier反变换，比较实验结果，说明图像Fourier相位谱的重要性。-Experimental contents: 1. Template for the following three frequency response and to show its three-dimensional graphics select an image using the three templates, respectively, of the image convolution operation, the convolution operation to obtain the images were compared with the original image to illustrate the template the type of template (b), (c) the difference with the contact. 2. Select an image, its discrete Fourier transform, only to use its phase spectrum remodeling the original image, and then only the use of its amplitude spectrum reconstruction of the original image to compare experimental results choice of two different types of images, respectively Fourier Transform, the exchange between the two after the phase spectrum for Fourier Transform, compare experimental results to illustrate the image of the importance of Fourier phase spectrum. Platform: |
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Author:syq |
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Description: this about DTFT.DTFT s matlab code and it is for Discrete time fourier transform.-this is about DTFT.DTFT s matlab code and it is for Discrete time fourier transform. Platform: |
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Author:Mahmut |
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Description: 离散的分数阶傅里叶变换MATLAB程度代码，可用于数字水印研究及图像处理、-Discrete fractional Fourier transform of the degree of MATLAB code can be used for digital watermarking and image processing, Platform: |
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Author:金翔 |
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Description: In mathematics, the discrete-time Fourier transform (DTFT) is one of the specific forms of Fourier analysis. As such, it transforms one function into another, which is called the frequency domain representation, or simply the "DTFT", of the original function (which is often a function in the time-domain).-This file includes matlab source code about DTFT and also includes explanation report Platform: |
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Author:linhu |
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Description: 本文介绍了数字信号处理中各种算法基本原理，包括Z 变换、DFT 变换及其快速
算法FFT 等信号变换算法和包括IIR 与FIR 数字滤波器的设计与实现，详细论述了利用
MATLAB 软件对信号变换和设计数字滤波器的原理﹑ 步骤和实现方法，并给出了基于
MATLAB 的模拟与仿真。文章最后给出了实验结果，并就其结果做了进一步的解释和说明。
关键词：Z 变换，离散傅立叶变换DFT，数字滤波器，系统结构仿真
-This article describes a variety of digital signal processing algorithms in the basic principles, including the Z transform, DFT transform and its fast algorithm FFT and other signal transform algorithm and including IIR and FIR digital filter design and implementation, discussed in detail by using MATLAB software, the signal transformation The principle and design of digital filters ﹑ steps and implementations, and gives MATLAB-based simulation and emulation. Article Finally, the experimental results and the results made on the further explanation and clarification. Key words: Z transform, discrete Fourier transform DFT, digital filter, system architecture simulation Platform: |
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Author:zhd |
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Description: 有关分数阶离散傅里叶变换的程序以及文章，文章详细介绍了离散傅里叶变换，有助于读者的学习-Fractional Fourier transform on the procedures and articles, the article introduces the discrete Fourier transform, to help readers learn Platform: |
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Author:隋磊 |
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Description: 对数字图像处理中的离散傅里叶变换(DFT),离散余弦变换（DCT）进行了详细的分析。其中DFT包括log视觉处理，中心点移动等。DCT包括分块处理，和保留较少系数，并比较结果。-Digital image processing of the discrete Fourier transform (DFT), discrete cosine transform (DCT) for a detailed analysis. DFT which include the log of visual processing, the center of movement. Including sub-block DCT processing, and retention of small coefficients, and compare the results. Platform: |
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Author:pxjy |
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Search - matlab:discrete fourier transform