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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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angleOfg2b
四旋翼飞行器动力学建模及控制 基于matalb/simulink 的四旋翼飞行器建模(Four-rotor dynamics modeling and control)
- 2014-12-01 15:40:19下载
- 积分：1
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simulink-8PSK
对8PSK完美建模，其中通过改变码元速率和载波频率，再计算相应的环路滤波器的参数，即可实现多种QPSK模型的解调，且该模型可通过SYSTEM generator进行量化，从而生成ISE能直接使用的HDL代码。(Perfect modeling of 8PSK, wherein by changing the symbol rate and carrier frequency, and calculate the corresponding parameters of the loop filter, to achieve a variety of demodulated QPSK model, and the model can be quantified by SYSTEM generator, thereby generating ISE HDL code can be used directly.)
- 2021-03-08 15:19:28下载
- 积分：1
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mfcc
Matlab source code for Mel Frequency cepstral coefficient
- 2015-03-03 21:56:43下载
- 积分：1
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sift
David G. Lowe的SIFT特征点检测及匹配源代码，内有自己总结的各文件及参数功能的PPT文档(David G. Lowe' s SIFT feature point detection and matching source code, the summary of each document has its own functions and parameters PPT documents)
- 2014-02-24 10:45:55下载
- 积分：1
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general_freqresponse_solution
通用振动方程频响求解，包括位移平频响，速度频响，加速度频响等(general frequency response function solution. )
- 2014-07-14 16:15:01下载
- 积分：1
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bpsksim_function
bpsk simulation(modulation n stuff)
- 2009-10-21 18:43:55下载
- 积分：1
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MAC_layer
matlab code for MAC Layer to simulate and verify resultat
- 2012-05-03 23:51:32下载
- 积分：1
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kaerman
用卡尔曼滤波器实现目标追踪，利用蒙特卡洛的方法对跟踪滤波器进行仿真分析，次数为1000次
(Kalman filter to achieve target tracking, using the Monte Carlo method of tracking filter simulation analysis, the number is 1000 times)
- 2013-09-03 17:16:41下载
- 积分：1
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ybs
计算时间序列样本熵，一种很有效的算法，依据算法步骤而编译(Calculate time series sample entropy)
- 2013-03-30 15:22:34下载
- 积分：1
