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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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mmpc
说明: 对变量DMC源程序,matlab语言。可以看看。(DMC source of variable)
- 2011-04-06 16:29:31下载
- 积分:1
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shannon-limit
通过matlab仿真实现香浓限的逼近,并进行比较。(Matlab simulation of the Shannon limit approaching, and for comparison.)
- 2012-06-11 16:06:16下载
- 积分:1
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Calendar
工厂日历,类似于google的 calendar功能比较强大(the shop calendar)
- 2015-03-31 09:33:13下载
- 积分:1
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two_way_control
为超级电容设计的双向充电 使用back-boost电路,含电流换向时切换控制方式(Designed for super capacitor two-way charge to use the back- the boost circuit, current commutation switch control mode)
- 2021-02-04 16:59:58下载
- 积分:1
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LBGmatlab
毕业设计做的...用LBG算法实现矢量量化的算法..matlab(Designed to do graduate ... the LBG algorithm using vector quantization algorithm .. matlab)
- 2009-03-23 23:16:11下载
- 积分:1
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ReedSolomon
非常实用的RS编译码程序。原理可以参考Sklar写的《数字通信》。(See "Digital Communications" by Sklar as the reference for this. These MATLAB scripts answer questions 8.3- 8.7, but using similar methods you might by hand. Includes generating Galois Field addition and multiplication tables, evaluation message and error vectors, and decoding)
- 2012-02-03 17:57:01下载
- 积分:1
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helloword
显示hello的matlab源代码
几句matlab的代码(Hello, matlab source code shows a few matlab code)
- 2011-04-20 21:37:09下载
- 积分:1
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Grey-model
用Matlab实现GM(1,1)模型进行拟合和预测(application of GM(1,1) model to analise on matlab)
- 2015-01-22 22:27:03下载
- 积分:1
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niufeng
包括回归分析和概率统计,包括调制,解调,信噪比计算,FMCW调频连续波雷达的测距测角。( Including regression analysis and probability and statistics, Includes the modulation, demodulation, signal to noise ratio calculation, FMCW frequency modulated continuous wave radar range and angular measurements.)
- 2016-06-21 13:42:45下载
- 积分:1