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Description: 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
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Description: c++实现HMM，向前向后算法，Viterbi算法，Baum-Welch算法。其中包括用c++定义的HMM数据结构。全部是cpp和h的文件-c achieve HMM, forward backward algorithm, Viterbi algorithm, Baum-Welch algorithm. C including the use of the HMM definition data structure. Cpp all the documents and h
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Author: 宋敏 |
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Description: 无损数据压缩的源码，Lempel Ziv Welch算法-lossless data compression source code, the Lempel Ziv Welch algorithm
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Size: 6144 |
Author: 别志松 |
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Description: kalman滤波的matlab程序Updated: January 11, 2002To execute the Matlab version simply execute gui.mEnjoy.Greg Welch-Kalman filtering Matlab procedures Updated : January 11, 2002To execute the Matlab version simply execu te gui.mEnjoy.Greg Welch
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Author: 洛阳 |
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Description: 在语音识别的hmm模型中使用matlab对语音信号进行训练的把baum源代码-in Speech Recognition hmm use Matlab model of voice signals training source put BAUM
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Description: 序列x（n）的Welch法功率谱估计
用matlab来实现-Sequence x (n) of the Welch method power spectrum estimation using matlab to achieve
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Author: cjl |
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Description: Welch法：Welch法对Bartlett法进行了两方面的修正：一是选择适当的窗函数w(n)，并在周期图计算前直接加进去，加窗的优点是无论什么样的窗函数均可使谱估计非负。二是在分段时,可使各段之间有重叠，这样会使方差减小。-Welch method: Welch method of Bartlett method amendments in two respects: First, select the appropriate window function w (n), and in the cycle before CALPHAD directly incorporated, plus the advantage of the window, no matter what kind of window function can be so spectral estimation of non-negative. Second, when in subparagraph can overlap between paragraphs, this would reduce the variance.
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Author: 赵西玲 |
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Description: 关于功率谱估计的,周期图法,自相关法,bartlett法和welch法,还有一个复倒谱估计的代码-On the power spectrum estimation, periodogram, since the relevant law, bartlett law and Welch law, there is a Complex Cepstrum estimated code
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Description: 有直接法,间接法,Bartlett法,Welch法-有????? ????? Bartlett ? Welch
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Author: yyb_whu |
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Description: 功率谱 welch 方法
there is a simple demo for non parameteric spectral estimation methods-Welch method of power spectrum there is a simple demo for non parameteric spectral estimation methods
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Author: lxp |
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Description: 求功率谱估计常用的几种方法，包括周期图法，Welch 法，和AR模型法。-For power spectrum estimation commonly used in several ways, including periodogram, Welch law, and the AR model.
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Author: 田晓红 |
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Description: 功率谱估计（周期图法、welch法、pmusic法等）-PSD estimation
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Size: 1024 |
Author: xiaoxin |
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Description: 该程序实现了Baum-Welch算法，对于通信里面的调制解调有很大帮助，其次，该程序具有通用性。-The program achieved the Baum-Welch algorithm, for the communication modem inside helps a lot, and secondly, the program has the versatility.
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Size: 1024 |
Author: 刘红 |
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Description: 进行谱分析，常用的几种谱分析方法，包括welsh-Spectral analysis, spectral analysis of several commonly used methods, including welsh
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Size: 1024 |
Author: 化石 |
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Description: welch功率谱估计实验代码，matlab源码，内附结果-welch power spectrum estimation experiment code, matlab source code, included the results of
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Size: 4096 |
Author: ZM |
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Description: lempel-ziv welch 编码 蓝波- 立夫- 卫曲编码法-lempel-ziv welch encoding, image compression
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Author: hernan |
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Description: 从经典功率谱估计周期图法原理入手，从理论上分析了其存在的局限性，借助Welch算法对其进行修正。依靠Matlab强大的数值分析和信号处理能力，进行实验仿真，比较不同的窗函数，不同的数据长度对Welch法谱估计质量的影响，并分析了造成这些影响的原因。-The paper mainly introduces the principles of Periodogram method of classical PSD estimation,analyzes the deficiency of Periodogram method in theory,and makes use of Welch to amend Perodogram method. By the use of simulation in Matlab, the impacts of different window function and different lenghth of data on estimation quality of Welch are discussed and the reasons of the impacts are analyzed.
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Size: 214016 |
Author: co |
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Description: 用matlab做经典功率谱估计，文件包含程序直接法、间接法、Bartlett法、Welch法(PSD using MATLAB, including direct method, indirect method,Bartlett method, and Welch method)
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Size: 4096 |
Author: bao11
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Description: MATLAB程序，估计实际应用中得到数据的功率谱(this is a matlab program And it's feature is to estimat the power spectrum of the data obtained in practical applications)
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Size: 1024 |
Author: wwll
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Description: 用matlab中的welch分析加速度功率谱密度(a example of matlab fwelch function)
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Author: 明天831019 |
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