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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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DOA-Matlab-code
Direction of Arrival (DOA) matlab code for acoustic source localization.
- 2013-01-25 03:48:44下载
- 积分：1
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MatlabFns
比较有名的matlab图像处理工具包，常见的一些图像处理功能里面都有，该工具包是一位从事计算机视觉研究的人写的，很好用，用起来也很方便(More famous matlab image processing toolkit, some common image processing functions which has the toolkit is a person engaged in computer vision research to write good use, and very convenient to use)
- 2017-01-11 10:12:32下载
- 积分：1
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OMNetpp
Modeling and Analysis of Computer Networks Course
- 2010-07-15 08:42:28下载
- 积分：1
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Adaptive-vibration-controlwith-tracking-filters
针对频率周期振荡的振动系统讨论自适应控制问题,在频率跟踪的基础上对频率变化的振动响应进行控
制,给出相应的估计、滤波与控制方法。首先在子空间辨识原理的基础上,通过测量信号自相关序列的递推运算获得信号
频率 然后根据估计频率实时调整带通滤波器的中心频率,使其跟踪信号频率,实现信号分量的跟踪滤波 最后在LMS方
法的基础上构造对信号分量进行控制的自适应控制器。(The adaptive vibration control of systems excited by forces of periodically varying frequencieswas dis-
cussed. The presented adaptive controlwas realized on the basis of tracking of time-varying frequencies and amethod for
online frequency estimation, filtering and controlwas proposed. Based on the principle of subspace identification, the
time-varying frequencieswere estimated from the recursively computed autocorrelation ofmeasured signals.
)
- 2011-01-11 22:07:26下载
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CoxWmk
用二维离散余弦变换(DCT)进行数字水印matlab源码(two-dimensional discrete cosine transform (DCT) digital watermarking Matlab FOSS)
- 2007-03-25 18:50:18下载
- 积分：1
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Very_Innovative
Numerical Solution, finite difference method, 3D, GUI, A very nice example of GUI
- 2014-12-25 13:43:36下载
- 积分：1
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QPSK
瑞利衰落信道下无分集，2分集，4分集，8分集的qpsk调制并与awgn信道对比(qpsk modulation)
- 2015-01-03 11:12:57下载
- 积分：1
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ZZK
PSD using BT/AR/ method,get the auto-correlation funtion(PSD using BT/AR/method, get the auto-correlation funtion)
- 2007-06-27 17:51:23下载
- 积分：1
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lslandlms
此程序为自适应信号处理中，LSL与LMS算法性能对比的程序。(LSL,LMS algorithm)
- 2009-03-20 16:54:21下载
- 积分：1
