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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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MatLabbiancheng
说明： 用于MATLAB编程及开发，解决实际问题，(For MATLAB programming and development, to solve practical problems,)
- 2010-04-24 09:46:52下载
- 积分：1
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matlab_intro
matlab入门培训教材，包括基本学习方法和基础知识的介绍(matlab Training course)
- 2012-04-04 14:10:57下载
- 积分：1
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kaiguan
主要开关电源用matlab仿真，实现从220v交流转化为直流电压(The main switching power supply with matlab simulation, converted into a DC voltage from 220v AC)
- 2012-05-29 19:59:25下载
- 积分：1
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Simulation-demodulation
MATLAB7.0 中的模拟仿真软件Simulink 仿真设计AM、DSB、SSB调制与解调系统。完成调制信号分析，并绘制相关的波形图及频谱图。(The simulation MATLAB7.0 simulation software Simulink design AM, DSB, SSB modulation and demodulation system. Complete modulation signal analysis, and draw the waveform and spectrum diagram related figure.)
- 2011-12-10 22:27:00下载
- 积分：1
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yechengxi-LightNet-6ada9dd
说明： 一个matlab神经网络工具箱，其中包含RNN,CNN等(Matlab neural network toolbox)
- 2020-01-20 10:27:48下载
- 积分：1
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excel
matlab gui设计 table和excel的交互使用方法。(matlab gui table and excel)
- 2014-08-19 15:05:09下载
- 积分：1
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deepsearch
基于深度优先搜索的电力系统分区：根据节点连接关系确定节点的所属分区，即系统最终分成多少个区域、每个区域包含哪些节点。(Power system Partition based on deep search according to connectivity , i.e., determining the number of sections and nodes in each section.)
- 2016-04-15 08:34:29下载
- 积分：1
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praticals_te
this program performs pn sequence generation, with the provision to change shift register sequences
- 2009-07-16 01:05:58下载
- 积分：1
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Kalman_Filter
说明： 两个简单的卡尔曼滤波的例子，适合初学者掌握基本原理。(Two simple examples of Kalman filter, suitable for beginners to master the basic principles.)
- 2010-04-12 23:24:24下载
- 积分：1
