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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,还可以采用对多个周期图求平均的功率谱估计方法的其他方法如Bartlett法等等,在功率谱估计上也能取得较好的结果。(consider three different values : L = 256 (3 data), L = 128 (7 data) and L = 64 (15 data). Their spectral estimation map as shown in Fig. It is clear to see that increase significantly decreasing window of the spectrum of false peaks, but much more to further smooth the peaks. Therefore, L = 64, in the case = 0.8 spectrum can determine the identification, but that the two peaks around is not easy to distinguish. L = 128 for the situation, which provided the separation and detection among the best balanced. Of course, L = 256 in the case, the effect is better, from the spectral estimation map clearly distinguish between the three lines of the existence and their relationship to the rate of strength. In addition to Welch law, but also can be used to map multiple cycle for the average power)
- 2005-07-12 11:18:13下载
- 积分:1
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matla图形图像处理
介绍了图像处理的一般知识以及如何应用MATLAB进行图像处理(of image processing and general knowledge of how to use MATLAB for image processing)
- 2005-07-12 21:27:47下载
- 积分:1
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matlab_dll_Cpp
作者曾经实现过将matlab函数编译成dll供Cpp调用,这篇文章的目的是对新增的面向对象的的扩展mwArray进行讲解,matlab很容易和C/C++联合起来使用。
以前做过matlab7与c++的混合编程:将matlab函数编译成dll给C++调用,从而加快开发的进度。但是今天在matlab2008b下面又做了一遍,发现matlab又改了很多东西,诸如增加了面向对象的的扩展mwArray,于是做笔记如下。(matlab_dll_Cpp)
- 2010-06-29 13:59:49下载
- 积分:1
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running
this is a a assembly code for multipattern running lights
- 2011-07-10 05:34:40下载
- 积分:1
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mianyi
这是一个免疫克隆算法程序,求解了一个非线性的函数问题的最优值。(This is an immune clone algorithm procedure for solving a nonlinear problem of the optimal value function.)
- 2009-03-29 13:26:52下载
- 积分:1
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s_GPS_INS_position_sp_demo899
关于GPS的MATLAB源程序,经运行验证,算法简单,结果有效。(MATLAB source code on the GPS, verified by running the algorithm is simple, and effective.)
- 2011-11-30 10:17:16下载
- 积分:1
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ASM
Three-phase Asychronous motor
- 2011-12-12 18:33:32下载
- 积分:1
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Double-ridge-waveguide
用有限差分法求双脊金属加载矩形波导的基模及第一个高阶模的色散特性曲线(
Finite difference method seeking double-ridged metal loaded rectangular waveguide fundamental mode and first higher order mode dispersion characteristic curve)
- 2021-03-18 14:29:20下载
- 积分:1
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倒频谱
用于齿轮信号的倒频谱分析,程序是通的,只需修改数据文件就可以。(Cepstrum analysis for gear signal,it is through,only the data files can be modified.)
- 2021-03-04 15:49:32下载
- 积分:1
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MATLAB
介绍了matlab的命令大全,以及相关的matlab的应用(Introduced the matlab command Daquan, and related applications matlab)
- 2011-01-03 10:35:45下载
- 积分:1