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随机信号功率谱分析
- 理解随机信号功率谱分析原理和方法。 (1) 生成信号,被淹没在在噪声中; (2) 试用周期图法估计信号的功率谱; (3) 选用不同窗,使用修正周期图法估计信号的功率谱; (4) 对一段语音信号,使用LD算法估计其功率谱; (5) 详细列出功率谱估计的步骤和原理。 -understanding of random signal power spectrum analysis principles and methods. (1) generate signals
松斋 经典功率谱估计
- 接法又称周期图法,它是把随机序列x(n)的N个观测数据视为一能量有限的序列,直接计算x(n)的离散傅立叶变换,得X(k),然后再取其幅值的平方,并除以N,作为序列x(n)真实功率谱的估计。 -Connection also known as cycle map, it is random sequence x (n) N observational data as a sequence of limited energy, direct calculation x (n) the discr
周期图法谱估计需要对信号序列“截断”或加窗处理
- 周期图法谱估计需要对信号序列“截断”或加窗处理,其结果是使估计功率谱密度为信号序列真实谱和窗谱的卷积,导致误差的产生。本程序分别设计了周期图法,最大熵功率谱估计和Welch法以及它们的对比,最大熵功率谱估计目的是最大限度地保留截断后丢失的“窗口”以外信号的信息,使估计谱的熵最大。-Periodogram spectrum estimation signal sequence needs to " cut off" or add the window handle, the
Periodogram-powe
- 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 est
Periodogram
- 利用周期图法对序列进行功率谱估计,数据窗采用汉明窗-Sequences using periodogram method for power spectrum estimation, the data window with Hamming window
esprit
- ESPRIT算法的经典功率谱估计程序,已运算过,下载即可使用-ESPRIT algorithm is the classic power spectrum estimation procedures have been operational before, you can use to download
work
- matlab,功率谱估计,包括PSD,DFT,最大熵等方法-matlab, power spectrum estimation, including PSD, DFT, such as maximum entropy method
spectralanalysis
- 谱估计(建立二阶AR模型)、利用FFT求解功率谱估计、利用AR模型的Yule-Walker方程求解模型参数等-Spectral estimation (the establishment of second-order AR model), using FFT to solve the power spectrum estimation using AR model of Yule-Walker equation model parameters such as
evlmem
- 最大熵法实现功率谱估计,内附算法实例及数据结果。-Maximum entropy power spectrum estimation method, containing the results of algorithm and data examples.
PSD_zqt
- 周期图法进行功率谱估计的函数,配套张旭东的课本习题-Periodogram power spectrum estimate of function, supporting the Textbook Exercise Zhang
zqt
- MATLAB经典周期图法功率谱估计对信号进行功率谱估计。-MATLAB classical periodogram power spectrum estimate of the signal power spectrum estimation.
zhouqitu
- 利用周期图法对信号进行功率谱估计,源代码,有详细的注解,供参考-Periodogram method using the signal power spectrum estimation, source code, there are detailed notes for reference
pisarenko
- 功率谱估计中 pisarenko 方法的多种实现-Power spectrum estimation in a variety of methods to achieve pisarenko
spectrumEstimation
- 经典功率谱估计的matlab代码,包括周期图法,BT法和Welch法,便于对经典功率谱估计性能的理解。-Classical power spectrum estimation matlab code, including Periodogram, BT France, and Welch law, to facilitate the performance of classical power spectrum estimation understanding.
h3
- 程序分为两部分,分别用周期图法、AR模型法实现了太阳黑子数据功率谱估计-Experiment is divided into two parts, with the periodogram method, AR model method to achieve a sunspot data power spectrum estimation
功率谱分析
- 通过MATLAB的平台,用直接法、间接法估计随机信号的功率谱,并绘图比较波形。(The power spectrum of random signal is estimated by direct method and indirect method through MATLAB platform, and the waveform is plotted and compared.)
功率谱估计
- OFDM的功率谱估计关于MATLAB的仿真实验(Power spectrum estimation of OFDM on MATLAB simulation experiment)
Desktop
- matlab经典法之周期图法对随机信号进行功率谱估计。(Matlab classical method of power spectrum estimation)
功率谱估计方法
- 功率谱估计方法功率谱估计方法功率谱估计方法功率谱估计方法功率谱估计方法功率谱估计方法
功率谱估计(重叠段/非重叠段)
- 加窗平均周期图法是对分段平均周期图法的改进。在信号序列x(n)分段后,用非矩形窗口对每一小段信号序列进行预处理,再采用前述分段平均周期图法进行整个信号序列x(n)的功率谱估计。由窗函数的基本知识可知,采用合适的非矩形窗口对信号进行处理可减小“频谱泄露”,同时可增加频峰的宽度,从而提高频谱分辨率。