Description: The Fast Fourier Transform (FFT) allows users to view the spectrum content of an audio signal. The FFT code presented here was written by Don Cross though his homepage appears to have subsequently been taken down. Rather than explain the mathematical theory of the FFT, I will attempt to explain its usefulness as it relates to audio signals-The Fast Fourier Transform (FFT) allows us ers spectrum to view the content of an audio sign al. The FFT code presented here was written by Do n Cross though his homepage appears to have subs equently been taken down. Rather than explain t he mathematical theory of the FFT. I will attempt to explain its usefulness as it re Lates to audio signals Platform: |
Size: 22612 |
Author:冰城 |
Hits:
Description: The Fast Fourier Transform (FFT) allows users to view the spectrum content of an audio signal. The FFT code presented here was written by Don Cross though his homepage appears to have subsequently been taken down. Rather than explain the mathematical theory of the FFT, I will attempt to explain its usefulness as it relates to audio signals-The Fast Fourier Transform (FFT) allows us ers spectrum to view the content of an audio sign al. The FFT code presented here was written by Do n Cross though his homepage appears to have subs equently been taken down. Rather than explain t he mathematical theory of the FFT. I will attempt to explain its usefulness as it re Lates to audio signals Platform: |
Size: 22528 |
Author:冰城 |
Hits:
Description: 用Matlab产生正弦波,矩形波,以及白噪声信号，并显示各自时域波形图
2．进行FFT变换，显示各自频谱图，其中采样率，频率、数据长度自选
3．做出上述三种信号的均方根图谱,功率图谱,以及对数均方根图谱
4．用IFFT傅立叶反变换恢复信号，并显示恢复的正弦信号时域波形图
-Using Matlab generated sine wave, rectangular wave, as well as the white noise signal, and display their respective time-domain waveform of Figure 2. FFT to transform, showing their frequency spectrum, including sampling rate, frequency, data length of 3-on-demand. Make the rms signal of the three maps, power maps, as well as the number of root-mean-square map 4. Fourier Transform IFFT with the restoration of signals, and displays the sinusoidal signal the resumption of time-domain waveform Platform: |
Size: 1024 |
Author:river |
Hits:
Description: 数字信号处理 信号与系统响应（1） 熟悉连续信号经理想采样前后的频谱变化关系，加深对时域采样定理的理解。
（2） 熟悉时域离散系统的时域特性
（3） 利用卷积方法观察分析系统的时域特性
（4） 掌握序列傅里叶变换的计算机实现方法，利用序列的傅里叶变换对连续信号、离散信号及系统响应进行频域分析。
-Digital Signal Processing Signals and Systems in response to (1) familiar with the continuous signal manager would like to sample before and after the change in the relationship between the spectrum and deepen the understanding of time-domain sampling theorem understanding. (2) familiar with the time-domain discrete-time systems time-domain characteristics (3) the use of convolution method of observing and analyzing the time-domain characteristics of the system (4) to master the computer sequence Fourier transform method, using sequence of Fourier transform of continuous signal , discrete signals and system response to frequency domain analysis. Platform: |
Size: 215040 |
Author:刘小象 |
Hits:
Description: 各种周期信号的傅里叶变换，如门信号等，还有些就是常用的信号。-A variety of Fourier transform of periodic signals, such as the gate signals, some signal is commonly used. Platform: |
Size: 3072 |
Author:lei |
Hits:
Description: 余弦信号的傅立叶变换 通信原理中的应用将余弦信号进行傅立叶变换-Cosine Fourier transform communications signals in the application of the principle of Platform: |
Size: 1024 |
Author:紫岚燕子 |
Hits:
Description: 关于傅立叶变换，无论是书本还是在网上可以很容易找到关于傅立叶变换的描述，但是大都是些故弄玄虚的文章，太过抽象，尽是一些让人看了就望而生畏的公式的罗列，让人很难能够从感性上得到理解，本文档写得非常浅显，里面有七章由浅入深地专门讲述关于离散信号的傅立叶变换，看了有茅塞顿开的感觉，在此把我从中得到的理解拿出来跟大家分享，希望很多被傅立叶变换迷惑的朋友能够得到一点启发。-On the Fourier transform, both the books or the Internet can easily be found on the Fourier transform of the descriptions, but mostly some trick of the article, too abstract, do some people read the formula on the daunting list, make it difficult to can be understood from the Emotionally, this document is written in very simple and obvious, there are seven chapters devoted to the greatest depth and the Fourier transform of discrete signals, there are enlightened sense of seeing, in which the understanding I gained out with you share the hope that many were confused friend Fourier transform can be a start. Platform: |
Size: 1452032 |
Author:吴飞 |
Hits:
Description: 介绍有关傅里叶变化的基础和性质，属于信号与系统基础内容，有一定的傅里叶变换的例子-Introduce the Fourier transform of the basis and nature of the content is the basis of signals and systems, there are some examples of Fourier transform Platform: |
Size: 1045504 |
Author:周玉佳 |
Hits:
Description: 通过MATLAB工具箱运用离散傅里叶变换对正弦信号和放波信号进行傅里叶分析-Through the use of Discrete Fourier Transform MATLAB toolbox on the sine wave signal and let the Fourier analysis of signals Platform: |
Size: 1024 |
Author:段西 |
Hits:
Description: This code implements automatic gain control for audio signals, which attempts to apply a smoothly-varying gain to an audio waveform in order to keep its energy close to some target level. This version also tries to balance the energy in individual frequency bands. It works by taking the short-time Fourier transform of the signal, smoothing that energy using time and frequency scales specified as arguments, then dividing out that scaled energy Platform: |
Size: 396288 |
Author:wangjin |
Hits:
Description: matlab读取txt文件，并进行福利叶变换，EMG信号的读取程序-matlab read the txt file, and make welfare Fourier transform, EMG signals of the read process Platform: |
Size: 1024 |
Author:kria |
Hits:
Description: 1、 熟悉理想采样的性质，了解信号采样前后的频谱变化，加深对采样定理的理解。
2、 熟悉离散信号和系统的时域特性。
3、 熟悉线性卷积的计算编程方法：利用卷积的方法，观察、分析系统响应的时域特性。
4、 掌握序列傅氏变换的计算机实现方法，利用序列的傅氏变换对离散信号、系统及系统响
应进行频域分析。 -1, familiar with the nature of the ideal sampling to understand the spectrum of the signal changes before and after sampling to enhance the understanding of the sampling theorem. 2, familiar with the discrete signals and systems in time domain. 3, familiar with the programming method linear convolution calculation: Using the convolution method, observation, analysis of system response in time domain. 4, the master sequence of computer realization of Fourier transform method, the use of Fourier transform of the sequence of discrete signals, systems and system response to frequency domain. Platform: |
Size: 247808 |
Author:hyz |
Hits:
Description: 当前信号处理中，对频谱的研究不断深入，本书中讲述如何使用快速傅里叶变化进行频谱变换，和图像相关性分析，信号处理- How to use FFT2 The note explains in detail how to apply the Matlab 2-dimensional FFT for filtering of two-dimensional signals, e.g. images. It is shown how to connect the output from fft2 to the actual Fourier transform of the signal, and in particular how transfer functions of simple filters may be coded.
Platform: |
Size: 109568 |
Author:wuchangke |
Hits:
Description: 非平稳信号的分析和处理是由张贤达编著的非平稳信号方面的教材，主要内容包括小波变换以及短时傅立叶变换等-Non-stationary signal analysis and processing edited by Zhang Xian of the non-stationary signals of materials, mainly including wavelet transform and short-time Fourier transform Platform: |
Size: 18608128 |
Author:柳艾飞 |
Hits:
Description: Gabor滤波器的原理是 其脉冲响应为一个谐波函数（即下式中的余弦函数）和一个高斯函数的乘积。根据信号与系统理论，时频域的卷积和乘积互为傅里叶变换。Gabor滤波器的傅里叶变换为谐波和高斯函数各自傅里叶变换的卷积-The principle of the Gabor filter is a harmonic of its impulse response function (i.e., the cosine function in the formula) and the product of a Gaussian function. According to the theory of signals and systems, time and frequency domain convolution product of the Fourier transform each other. Fourier transform of the Gabor filter and Gaussian function is the harmonic each convolution of the Fourier transform Platform: |
Size: 122880 |
Author:赵 |
Hits:
Description: MATLAB是一套功能十分强大的工程计算及数据分析软件,具有友好的可视化编程界面及接近数学表达式的自然化语言。针对信号与系统中傅里叶变换具有抽象度高、难于理解的特点，利用MATLAB强大的信号处理功能、阶跃响应，微分方程，卷积定理的内容，通过MATLAB 程序实现。本文介绍了MATLAB在信号与系统仿真中的应用,该软件在通信电子类课程中应用越来越广泛,通过几个典型实例来重点研究。
关键词：MATLAB；阶跃响应；微分方程；卷积；信号与系统；仿真 -MATLAB is a very powerful engineering calculations and data analysis software, with a friendly interface and visual programming language close to naturalizing mathematical expressions. For the Fourier transform of signals and systems with a high degree of abstraction, it is difficult to understand the characteristics, the use of the powerful MATLAB signal processing functions, step response, convolution theorem content differential equations by MATLAB program. This article describes the application of MATLAB in signal and system simulation, the software in the electronic communications courses in applied more widely, by focusing on a few typical examples.
Keywords: MATLAB step response signals and systems convolution differential equation simulation Platform: |
Size: 18432 |
Author: 王娟 |
Hits:
Description: 有了傅立叶变换，我们可以从信号的频域特征去分析信号。尤其在无线通信系统 中，傅里叶变换的重要性就更加明显了，无论是设计者还是测试工程师，在工作中都会和傅立叶变换打交道。-With the Fourier transform, we can go to analyze signals the frequency domain characteristics of the signal. Especially in a wireless communication system, the importance of the Fourier transform becomes more apparent, whether designers or test engineers are at work and dealing with the Fourier transform. Platform: |
Size: 317440 |
Author:毛巴马 |
Hits:
Description: FFT应用实例
产生一组信号，由两个频率为60Hz和150Hz的正弦信号和随机噪声叠加而成，-FFT application instanceproduce a set of signals, by two frequency is 60 hz and 150 hz sine signal and random noise, Platform: |
Size: 360448 |
Author:小伟 |
Hits:
Search - fourier transform of signals