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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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Cp
说明: 风能利用系数计算模型风能利用系数计算模型风能利用系数计算模型(Wind energy utilization factor calculation model)
- 2012-06-06 09:29:46下载
- 积分:1
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matlab
Matlab学习资料,包括MATLAB基础教程、matlab实用教程、精通Matlab6[1].5(张志涌)等(Matlab learning materials, including MATLAB Basics Tutorial, matlab practical course, master Matlab6 [1] .5 (Zhang Yong), etc.)
- 2010-06-04 12:14:03下载
- 积分:1
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classify
file is usefl for classification
- 2012-04-09 18:43:53下载
- 积分:1
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ML_Automata
Automata using MATLAB
- 2015-02-14 16:40:26下载
- 积分:1
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consensus
说明: 标准的一致性算法,该算法能够使设置的一致性变量收敛于同一值。同时附上常用的30个函数,便于理解。(Standard consensus algorithm, which can make the set consensus variable converge to the same value.At the same time, 30 common functions are attached for easy understanding.)
- 2021-01-03 21:58:56下载
- 积分:1
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huatu
本人的matlab作业,用于画图,格式美观大方,易于生手使用(my matlab homework ,for plot figura)
- 2010-11-11 17:36:46下载
- 积分:1
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corba2
关于CORBA 通信的描述和开发,原理和 概念 ,中文版 (The description on the CORBA communication and development, principles and concepts, the Chinese version)
- 2010-05-12 13:34:14下载
- 积分:1
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Bootsbagsmethodresampling
靴袋法重采样,用于小样本时的重新采样后扩大样本含量的程序(Boots bags method re-sampling)
- 2010-05-19 16:32:01下载
- 积分:1
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Rectifier-3-phasa
rectifier 3 phasa close loop
- 2012-05-11 06:53:00下载
- 积分:1