Improved EMD Using Doubly-Iterative Sifting and High Order Spline Interpolation
标签： Doubly-Iterative Interpolation Improved Sifting
上传时间： 2017-08-26
上传用户：zhliu007
Function interpolation
上传时间： 2013-12-25
上传用户：aa17807091
digital image interpolation techniques including nearest neighbor, bilinear, bicubic and spline interpolation.
标签： interpolation techniques including bilinear
上传时间： 2014-01-06
上传用户：小儒尼尼奥
为提升虚拟仪器传输速率与实时性能，扩展监测范围，在VC的软件平台上设计了一种全功能虚拟示波器。与传统虚拟示波器相比，该系统采用嵌入式系统完成信号采集，采用工业以太网为传输介质，通过线性插值算法和多线程编程思想，实现波形显示、参数计算、频谱分析以及波形存储及回放功能。实验结果表明，该虚拟示波器可以实现20 kHz采样频率下的波形精确显示，达到预期的各项指标。 Abstract: o enhance the transfer rate and real-time of virtual instrument performance， expand scope of monitoring， this paper uses the VCs software platform to design a fully functional virtual oscilloscope. Compared with traditional virtual oscilloscope， this system adopts the embedded system to complete the data acquisition， industrial Ethernet as the transmission medium used by the linear interpolation algorithm and multi-threaded programming ideas， namely to achieve waveform display， parameter calculation， spectrum analysis and waveform storage and playback. Experimental results show that the virtual oscilloscope can accurately display the waveform with 20kHz sampling frequency， and achieve the desired targets.
上传时间： 2013-11-25
上传用户：wbwyl
基于matlab的数值计算试验程序。equ_direct，equ_iter，interpolation等
标签： equ_direct matlab 数值计算 程序
上传时间： 2014-12-21
上传用户：hjshhyy
This paper investigates the design of joint frequency offset and carrier phase estimation of a multi-frequency time division multiple access (MF-TDMA) demodulator that is applied to a digital video broadcasting—return channel system via satellite (DVB-RCS). The proposed joint estimation algorithm is based on the interpolation technique for two correlation values in the frequency and phase domains. This simple interpolation technique can significantly improve frequency and phase resolution capabilities of the proposed technique without increasing the number of the correlation values. In addition, the overall block diagram of a digital communications receiver for DVB-RCS is presented, which was designed using the proposed estimation algorithms. Index Terms—Carrier phase estimation, DVB-RCS, frequency offset estimation, interpolation, joint estimation, MF-TDMA.
标签： investigates estimation frequency carrier
上传时间： 2015-12-30
上传用户：ls530720646
There are numerous MATLAB m-files included in this software package. Thus, the the authors have bundled all files and sample data in a *.zip file (KTHorb.zip). The Readme.txt file describes the directories created when the .zip file is unpacked. The file Matlab_implementation.doc (or Matlab_implementation.txt) describes some of the classes and methods included in the package for GPS satellite orbit interpolation.
标签： the numerous included software
上传时间： 2016-03-08
上传用户：qweqweqwe
PNG开放源接口 The interface has been designed to be as simple and intuitive as possible. It supports plotting and reading in the RGB (red, green, blue), HSV (hue, saturation, value/brightness) and CMYK (cyan, magenta, yellow, black) colour spaces, basic shapes, scaling, bilinear interpolation, full TrueType antialiased and rotated text support, bezier curves, opening existing PNG images and more.
标签： interface intuitive designed possible
上传时间： 2013-12-23
上传用户：qilin
DFT(Discrete Fourier Transformation)是数字信号分析与处理如图形、语音及图像等领域的重要变换工具，直接计算DFT的计算量与变换区间长度N的平方成正比。当N较大时，因计算量太大，直接用DFT算法进行谱分析和信号的实时处理是不切实际的。快速傅立叶变换(Fast Fourier Transformation，简称FFT)使DFT运算效率提高1～2个数量级。其原因是当N较大时，对DFT进行了基4和基2分解运算。FFT算法除了必需的数据存储器ram和旋转因子rom外，仍需较复杂的运算和控制电路单元，即使现在,实现长点数的FFT仍然是很困难。本文提出的FFT实现算法是基于FPGA之上的，算法完成对一个序列的FFT计算，完全由脉冲触发，外部只输入一脉冲头和输入数据，便可以得到该脉冲头作为起始标志的N点FFT输出结果。由于使用了双ram，该算法是流型(Pipelined)的，可以连续计算N点复数输入FFT，即输入可以是分段N点连续复数数据流。采用DIF(Decimation In Frequency)-FFT和DIT(Decimation In Time)-FFT对于算法本身来说是无关紧要的，因为两种情况下只是存储器的读写地址有所变动而已，不影响算法的结构和流程，也不会对算法复杂度有何影响。
标签： Transformation Discrete Fourier DFT
上传时间： 2016-04-12
上传用户：lx9076
数值分析算法源码(java) 这个学期一边学习java一边学习数值分析,因此用java写了一个数值分析算法的软件包numericalAnalysis. [说明] 适合使用者:会java的,想要学习数值分析算法的人. 本代码对照书:数值分析第二版,史万明等编,北京理工大学出版社. 本代码尽量按书中描述的来写,可以提供参考. [使用方法] 在java的ide中新建一个项目,把numericalAnalysis包直接拷贝到此项目的源文件夹中,然后要解决什么问题,就相应的编译运行什么包. 另外有这些类的API提供参考,可以自己根据自己要求写驱动类.运行API文件夹中的index.html文件就行. [包的结构] numericalAnalysis包中又含有9个包,除function包的是接口外,其余包都含有一个独立的数值分析问题的类以及其驱动类.9个包如下: differential:微分问题 equation:方程 function:只含一个接口,用来让用户写自己的函数 functionApproximation:离散情况下函数逼近问题 integration:积分问题 interpolation:插值问题 linearEquationGroup:线性方程组问题(包括过定方程组) norm:求解向量和矩阵的范数 ode:常微分方程数值解的求解
标签： java numericalAnalysis 数值分析 算法
上传时间： 2014-01-04
上传用户：wff
