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用Welch法进行功率谱估计
- 考虑L的三个不同值:L=256(3个数据段),L=128(7个数据段)和L=64(15个数据段)。各自的谱估计图如上图所示。可以明显的看到,加窗明显的减小了频谱上的假谱峰,但也更加进一步平滑了谱峰。所以,对于L=64的情况,在ω=0.8π的谱线可以很确定的辨认,但是那两个靠近的谱峰不容易区分。对于L=128的情况,这种情况提供了在分离和检测间最好的均衡。当然,对于在L=256时的情况,效果是更好的,能够从谱估计图上明显的分辨出三条谱线的存在以及它们幅度关系的强弱。 除了Welch法外,还可以采用
PTbox
- Prony算法工具箱。Prony方法是用一组指数项的线性组合来拟和等间距采样数据的方法,可以从中分析出信号的幅值、相位、阻尼因子、频率等信息。considerations including data preprocessing, model order selection, model order selection criteria, signal subspace selection, signal and noise separation, root inspection and ass
new-lms-arithmetic-simulation-code
- In 1960, R.E. Kalman published his famous paper describing a recursive solution to the discrete-data linear filtering problem. Since that time, due in large part to advances in digital computing, the Kalman filter has been the subject of extensiv
BIQPBOX
- %BIQPBOX Bisection reflective line search for sqpbox % [nx,nsig,alpha] = BIQPBOX(s,c,strg,x,y,sigma,l,u,... % oval,po,normg,DS,mtxmpy,data,H) % returns the new feasible point nx, the corresponding sign vector nsig, % and the step size of the
EM_GM
- % EM algorithm for k multidimensional Gaussian mixture estimation % % Inputs: % X(n,d) - input data, n=number of observations, d=dimension of variable % k - maximum number of Gaussian components allowed % ltol - percentage of the log likeli
RecPF_v2.2
- 基于局部傅里叶变换数据的重构算法的研究,是一种比有效快速的重构算法-New features: Switched to complex computation, fully compatible with complex data Replaced penalty parameter continuation by R. Glowinski and P.L. Tallec s alternating direction method (ADM or ADMM) New
fit
- 用差分方程或数值微分解决简单的实际问题。 实验3 插值与数值积分 l 插值问题提法和求解思路 l Lagrange插值的原理和优缺点 l 分段线性和三次样条插值的原理和优缺点 l 用MATLAB实现分段线性和三次样条插值 l 梯形、辛普森积分公式的原理及MATLAB实现 l 数值积分公式的误差——收敛阶的概念 l 高斯积分公式 l 广义积分与多重积分 l 用插值和数值积分解决
Auto_Measure_system
- 利用ccs环境、MATLAB环境、DSP(TMS320F2812)、被测对象和Agilient网络分析仪E5071B,构建一个自动测量系统。 相信大部分人都知道基于NI公司的GPIB总线,可以实现自动测量,但NI公司的方案实在太昂贵,采用MATLAB能够大大降低成本。matlab与ccs之间基于RTDX协议进行数据交换,同时matlab基于TCP/IP协议与E5071B之间通信,源码说明如下: (1)RTDX_ok目录:matlab7.0代码,包含了一个用GUI实现的界面和相关的具体代码
pnn_lvq
- lvq 算法 关于读取一个手写字体的数据库的代码的问题[图像图形-Identification of data sets, can be used as, the classification of experimental data. Category: Pattern Recognition
BP1
- 采用L-M优化算法用以训练BP神经网络,使其能够拟合某一附加有白噪声的正弦样本数据。设计一个三层BP神经网络,其网络的隐含层神经元的激励函数为双曲正切型,输出层各神经元的激励函数为线性函数,隐含层有6个神经元-LM optimization algorithm used to train BP neural network to enable it to fit a white noise, sine additional sample data. Design a three BP neura
plot3k
- Generate a 3D point plot of L=(x,y,z) using the values in the vector c to determine the color of each point. If c is empty, then z (column 3 of L) is used to color the plot. The data points are sorted so that plot3 is only called once for each
KarhunenLoeve
- 数据降维算法 K_L变换是一种最优正交变换,以矢量信号X的协方差矩阵Ф的归一化正交特征矢量q所构成的正交矩阵Q,来对该矢量信号X做正交变换Y=QX,则称此变换为K-L变换(K-LT或KLT)。-Data reduction algorithm K_L optimal orthogonal transform is a transformation to vector signal covariance matrix Ф X normalized orthogonal feature vect
zuoye3
- 用FAMALE.TXT和MALE.TXT的数据作为本次作业使用的样本集,利用K-L变换对该样本集进行变换,与过去用Fisher线性判别方法或其它方法得到的分类面进行比较.-Use FAMALE. TXT and MALE. TXT data as the assignment is to use the data sets, by K-L of the sample set of change, and the past with Fisher transformation linear dis
reduce_ISI(NLMS_BLMS)
- 如何减少ISI?分别用NLMS,BLMS,基于符号的LMS算法完成仿真,并比较结果,包括不同信道参数w,不同数据块长度L对其的影响。-How to reduce the ISI? Respectively NLMS, BLMS, symbol-based LMS algorithm to complete the simulation, and compare the results, including different channel parameters w, different dat
l-p-opf
- matlab ieee modified 30 bus data and pso economic disaptch
nlms
- 用NLMS基于符号的LMS算法完成仿真,并比较结果,包括不同信道参数w,不同数据块长度L对其的影响。-With NLMS symbol-based LMS algorithm to complete the simulation, and compare the results, including different channel parameters w, different data block length L of its impact.
kmeans
- function [L,C] = kmeans(X,k) KMEANS Cluster multivariate data using the k-means++ algorithm. [L,C] = kmeans(X,k) produces a 1-by-size(X,2) vector L with one class label per column in X and a size(X,1)-by-k matrix C containing the centers
Wiener
- 设计一维纳滤波器 (1). 产生三组观测数据:首先根据S(n)=aS(n-1)+w(n)产生信号S(n),将其加噪声(信噪比分别为20db,10db,6db),得到观测数据X1(n),X2(n),X3(n)。. (2). 估计Xi(n),i=1,2,3的AR模型参数。假设信号长度为L,AR模型阶数为N,分析实验结果,并讨论改变L,N对实验结果的影响。-Design a Wiener filter (1) produces three sets of observations: Fi
Modified-periodogram
- (2). 采用汉明窗,分段长度L=32,用修正的周期图法进行谱估计,并分析数据长度N,分段长度M对谱估计结果的影响。-(2) using Hamming window, segment length L = 32, the modified periodogram method of spectral estimation and analysis of data length N, the length M of the sub-spectrum estimation results.
l
- 。基于此本文提出一种利用Microsoft Access数据库实现VB与Matlab数据交换的方法,在程序设计中可充分利用两种软件的优势,可以大大缩短软件开发周期,为 含复杂数学计算的可视化软件设计提供了一种可选的方案。-A new method is proposed in this paper to realize data communication between VB and Matlab based on Microsoft Access. It provides a g
