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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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ofdm_equal
说明: OFDM系统中时域均衡的仿真和结果分析,先对搭建的最基本的OFDM系统性能进行仿真分析,然后对在多径信道下的OFDM系统性能进行仿真分析,最后对MMSE算法进行仿真分析。(OFDM system, time domain equalization and results of the simulation analysis, the first of the basic structures of the simulated OFDM system performance analysis, and multi-path channel in the OFDM system performance under simulated and analyzed, the final simulation of the MMSE algorithm.)
- 2020-08-26 15:18:14下载
- 积分:1
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GUIDE_video
Advanced techniques in GUI building with GUIDE. Techniques include: multi-window GUIs, application.
- 2014-12-03 18:01:02下载
- 积分:1
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c3_1
This file permits to solve the equation type Ax=b by the iterative methods.
- 2015-04-21 18:19:14下载
- 积分:1
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intmain
利用matlab产生二进制调制信号波形,以实现噪声信号干扰研究(Matlab generated using the binary modulation signal waveform in order to achieve noise signal interference study)
- 2008-05-26 11:05:54下载
- 积分:1
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kal
说明: 卡尔曼滤波,我是从国外下载来得 ,大家看一下有什么问题,我不是很懂,最近正在做,有机会了和大家交流。(Kalman filtering, I was downloaded more from abroad, we have to look at what, I do not know very much about. recently are doing, and have the opportunity to share.)
- 2006-04-20 09:28:06下载
- 积分:1
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DSP_MATLAB
数字信号处理 理论 算法与实现.配书光盘.Matlab(Algorithm for digital signal processing theory and implementation. With the book CD. Matlab)
- 2010-08-16 16:11:06下载
- 积分:1
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Waveleteanalysis
详解在matlab中实现小波分析,介绍小波工具箱的使用(Describe the implementation of wavelet analysis in the matlab platform, and also introduce the use of wavelet toolbox)
- 2009-03-24 15:56:02下载
- 积分:1
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skin_face_detecting
This Code was developed from the code tracking red objects. it could be used for tracking faces if the color of the background is not the same color as human skin. This code runs fine even when you use the webcam on PC
- 2013-03-14 04:13:16下载
- 积分:1
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electric_drivel
Model of electric drive with DC machine controlled in closed loop
- 2014-12-21 08:45:35下载
- 积分:1