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: |
Size: 3072 |
Author:深蓝 |
Hits:
Description: 在谱分析中，数据长度N，采样频率fs，频谱中的分辨率为df=fs/N。为了提高谱分析中的分辨率，常用ZOOMFFT，这里给出了相应的MATLAB程序。-In spectrum analysis, the data length N, the sampling frequency fs, the spectrum of a resolution of df = fs/N. Spectral analysis in order to improve the resolution, commonly used ZOOMFFT, here the corresponding MATLAB procedures. Platform: |
Size: 49152 |
Author:songzy41 |
Hits:
Description: 用FFT对连续信号和时域离散信号进行谱分析的方法，了解可能出现的分析误差及其原因-Using FFT for continuous signals and discrete signals in time domain method of spectral analysis to understand the possible analytical error and its causes Platform: |
Size: 1024 |
Author:xuxiaodong10 |
Hits:
Description: Matlab编程实现FFT变换及频谱分析的程序代码，能出结果，不错-Matlab Programming FFT transform and spectral analysis of the program code to the results, it is true Platform: |
Size: 3072 |
Author:jonelove |
Hits:
Description: matlab下数字信号处理实现例程，包括FFT进行信号频谱分析，窗函数法设计FIR滤波器，IIR滤波器的实现等-matlab under the realization of digital signal processing routines, including the FFT signal spectral analysis, the window function design FIR filters, IIR filters to achieve such Platform: |
Size: 173056 |
Author:周期 |
Hits:
Description: 用MATLAB做得fft谱分析，非常的好用。需要做这方面试验的，可以看看。-Fft done using MATLAB spectral analysis, very easy to use. Test needs to be done in this area, you can look at. Platform: |
Size: 57344 |
Author:yanyan |
Hits:
Description: 数字信号处理的课程设计，关于用FFT作谱分析，用MATLAB做的-Digital signal processing of curriculum design, on the use of FFT for spectral analysis, using MATLAB to do Platform: |
Size: 6144 |
Author:王强 |
Hits:
Description: FFT变换 实现频谱分析 信号处理方面有重要作用 -Transform FFT spectral analysis signal processing plays an important role in Platform: |
Size: 141312 |
Author:lifei |
Hits:
Description: matlab 用DFT实现长序列卷积并用FFT进行信号谱分析-matlab convolution with the DFT and used to achieve a long sequence of FFT for signal spectral analysis Platform: |
Size: 1024 |
Author:刘彦龙 |
Hits:
Description: Matlab实现的全相位频谱分析，可以自行设定点数和输入序列。结果包括频谱图和与普通fft的对比-Matlab to achieve all-phase spectral analysis, can draw up a point and input sequence. The results include the spectral figure and the comparison with ordinary fft Platform: |
Size: 1024 |
Author:Li Hai |
Hits:
Description: 本上传讲解了傅里叶变换与频谱分析之间的关系，通过fft的到信号的频谱图-Explained the Fourier transform of the upload and spectral analysis of the relationship between the fft of the signal through the frequency spectrum Platform: |
Size: 347136 |
Author:阿虎 |
Hits:
Description: 平均周期图法和平滑平均周期图法估计功率谱
从经典功率谱估计周期图法原理入手，从理论上分析了其存在的局限性，借助Welch算法对其进行修正。依靠Matlab强大的数值分析和信号处理能力进行实验!!
用周期图法和welch法分别估计了一下信号的功率谱密度。采样频率200Hz，时间序列长度2048，FFT数据点数2048。其中welch法使用hanning窗，窗口长度600．-Average periodogram and periodogram smoothing method to estimate the average power spectrum from the classical power spectrum estimation periodogram principle starting from the theoretical analysis of the limitations of its existence, with the Welch algorithm, amending them. Rely on the powerful Matlab numerical analysis and signal processing capabilities to experiment!! With periodogram and welch method were estimated signal power spectral density about. Sampling frequency of 200Hz, the time sequence length 2048, FFT data points 2048. Welch method which uses hanning window, the window length of 600. Platform: |
Size: 1024 |
Author:renjie |
Hits:
Description: FFT在matlab中的实践分析，例子为求一个正弦波的频谱图、均方根谱、功率谱、对数谱和进行IFFT的变换。简单易懂，供大家参考-FFT analysis of the practice in matlab, examples for the sake of a sine wave of frequency spectrum, the rms spectrum, power spectrum, and the IFFT on the number of spectral transformation Platform: |
Size: 3072 |
Author:andy |
Hits:
Description: 用FFT对连续时间信号进行频谱分析（基于matlab）里面包含了程序代码。-Continuous-time signal using FFT for spectral analysis (based on matlab) which contains the program code. Platform: |
Size: 1024 |
Author:蒋翔 |
Hits:
Description: Matlab编程实现FFT变换及频谱分析的程序代码，很有用涂的，可以实现-Matlab Programming FFT transform and spectral analysis of the program code, useful for coating can be achieved Platform: |
Size: 4096 |
Author:abs |
Hits:
Description: matlab下的数字信号处理程序的示例，包括 信号、系统和系统响应 用FFT进行信号的频谱分析 窗函数法设计FIR滤波器 IIR滤波器的实现等- examples of digital signal processing, including under matlab signal, the system and the system response signal using the FFT spectral analysis window FIR filter design function IIR filter realization Platform: |
Size: 173056 |
Author:莉莉 |
Hits:
Search - fft matlab spectral analysis