Improved EMD Using Doubly-Iterative Sifting and High Order Spline Interpolation
標簽： Doubly-Iterative Interpolation Improved Sifting
上傳時間： 2017-08-26
上傳用戶：zhliu007
Function interpolation
上傳時間： 2013-12-25
上傳用戶：aa17807091
digital image interpolation techniques including nearest neighbor, bilinear, bicubic and spline interpolation.
標簽： interpolation techniques including bilinear
上傳時間： 2014-01-06
上傳用戶：小儒尼尼奧
為提升虛擬儀器傳輸速率與實時性能，擴展監(jiān)測范圍，在VC的軟件平臺上設(shè)計了一種全功能虛擬示波器。與傳統(tǒng)虛擬示波器相比，該系統(tǒng)采用嵌入式系統(tǒng)完成信號采集，采用工業(yè)以太網(wǎng)為傳輸介質(zhì)，通過線性插值算法和多線程編程思想，實現(xiàn)波形顯示、參數(shù)計算、頻譜分析以及波形存儲及回放功能。實驗結(jié)果表明，該虛擬示波器可以實現(xiàn)20 kHz采樣頻率下的波形精確顯示，達到預期的各項指標。 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.
上傳時間： 2013-11-25
上傳用戶：wbwyl
基于matlab的數(shù)值計算試驗程序。equ_direct，equ_iter，interpolation等
標簽： equ_direct matlab 數(shù)值計算 程序
上傳時間： 2014-12-21
上傳用戶：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.
標簽： investigates estimation frequency carrier
上傳時間： 2015-12-30
上傳用戶：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.
標簽： the numerous included software
上傳時間： 2016-03-08
上傳用戶：qweqweqwe
PNG開放源接口 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.
標簽： interface intuitive designed possible
上傳時間： 2013-12-23
上傳用戶：qilin
DFT(Discrete Fourier Transformation)是數(shù)字信號分析與處理如圖形、語音及圖像等領(lǐng)域的重要變換工具，直接計算DFT的計算量與變換區(qū)間長度N的平方成正比。當N較大時，因計算量太大，直接用DFT算法進行譜分析和信號的實時處理是不切實際的。快速傅立葉變換(Fast Fourier Transformation，簡稱FFT)使DFT運算效率提高1～2個數(shù)量級。其原因是當N較大時，對DFT進行了基4和基2分解運算。FFT算法除了必需的數(shù)據(jù)存儲器ram和旋轉(zhuǎn)因子rom外，仍需較復雜的運算和控制電路單元，即使現(xiàn)在,實現(xiàn)長點數(shù)的FFT仍然是很困難。本文提出的FFT實現(xiàn)算法是基于FPGA之上的，算法完成對一個序列的FFT計算，完全由脈沖觸發(fā)，外部只輸入一脈沖頭和輸入數(shù)據(jù)，便可以得到該脈沖頭作為起始標志的N點FFT輸出結(jié)果。由于使用了雙ram，該算法是流型(Pipelined)的，可以連續(xù)計算N點復數(shù)輸入FFT，即輸入可以是分段N點連續(xù)復數(shù)數(shù)據(jù)流。采用DIF(Decimation In Frequency)-FFT和DIT(Decimation In Time)-FFT對于算法本身來說是無關(guān)緊要的，因為兩種情況下只是存儲器的讀寫地址有所變動而已，不影響算法的結(jié)構(gòu)和流程，也不會對算法復雜度有何影響。
標簽： Transformation Discrete Fourier DFT
上傳時間： 2016-04-12
上傳用戶：lx9076
數(shù)值分析算法源碼(java) 這個學期一邊學習java一邊學習數(shù)值分析,因此用java寫了一個數(shù)值分析算法的軟件包numericalAnalysis. [說明] 適合使用者:會java的,想要學習數(shù)值分析算法的人. 本代碼對照書:數(shù)值分析第二版,史萬明等編,北京理工大學出版社. 本代碼盡量按書中描述的來寫,可以提供參考. [使用方法] 在java的ide中新建一個項目,把numericalAnalysis包直接拷貝到此項目的源文件夾中,然后要解決什么問題,就相應(yīng)的編譯運行什么包. 另外有這些類的API提供參考,可以自己根據(jù)自己要求寫驅(qū)動類.運行API文件夾中的index.html文件就行. [包的結(jié)構(gòu)] numericalAnalysis包中又含有9個包,除function包的是接口外,其余包都含有一個獨立的數(shù)值分析問題的類以及其驅(qū)動類.9個包如下: differential:微分問題 equation:方程 function:只含一個接口,用來讓用戶寫自己的函數(shù) functionApproximation:離散情況下函數(shù)逼近問題 integration:積分問題 interpolation:插值問題 linearEquationGroup:線性方程組問題(包括過定方程組) norm:求解向量和矩陣的范數(shù) ode:常微分方程數(shù)值解的求解
標簽： java numericalAnalysis 數(shù)值分析 算法
上傳時間： 2014-01-04
上傳用戶：wff
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