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fhss
frequency hopping spread spectrum
- 2009-11-20 02:04:51下载
- 积分:1
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transformer_saturable
变压器仿真,根据原理建立模型,用仿真模块仿真,(Transformer simulation, in accordance with the principle of the establishment of model simulation using Simulation Module,)
- 2009-05-13 18:12:44下载
- 积分:1
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03607_28
DFT进行频谱分析时的三种现象
1、混叠:对连续信号采样,要求连续信号是带限的,采样频率要足够高。Fs应满足Nyquist采样定理才不产生混叠。
采样前加低通滤波器防混叠
2、频谱泄漏:DFT对时域信号进行了截断(相当于采样信号乘了一个窗函数),时域的乘积相当于频域卷积,改变了原信号频谱。
改用其他窗函数(非矩形)改善泄漏。
3、栅栏现象:DFT 只给出了频谱在采样点上的取值,采样点间的频谱内容丢失。(DFT spectrum analysis of a three phenomena, aliasing : continuous signal sampling, requiring continuous signal is band-limited, the sampling frequency should be high enough. Fs meet the Nyquist Sampling Theorem would not have aliasing. Sampling former low-pass filter plus anti-aliasing 2, spectrum leakage : DFT right time domain signal a disconnect (equivalent to a sampling signal by a window function). time domain is equivalent to the product of frequency-domain convolution, changes in the spectrum of the original signal. Window functions to switch to other (non-rectangular) to improve leakage. 3, fenced phenomenon : DFT spectrum is given only at the sampling point value, sampling points of the spectrum as lost.)
- 2007-05-08 16:22:17下载
- 积分:1
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wendu
温度测量仿真应用,主要是利用仿真软件matlab进行仿真(Temperature measurement simulation applications, mainly using simulation software Matlab simulation)
- 2012-11-10 00:46:59下载
- 积分:1
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多模态生物识别技术
内容: A.zip:代码与Matlab的2007年a及以上兼容 B.zip:代码与Matlab的2007年b和新的兼容 data.zip:测试数据 instructions.pdf:这个文件 说明: 解压选定的文件(A.zip或B.zip)在Matlab当前目录下(C:/.../在Matlab /工作是默认 1)。 键入MATLAB命令窗口的主要功能的名称。 现在,一个简单而直观的图形用户界面就会出现。 你可以使用目前的data.zip图像/数据:刚刚解压缩它们在Matlab当前目录。 常问问题: 函数没有被定义或使用不当。是什么错误?只是给我发电子邮件错误信息, 您的Matlab的版本,我会及时修改代码。欲了解更多详细信息,请参阅兼容性 摘要Matlab软件。
- 2023-08-13 04:35:03下载
- 积分:1
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ma
说明: 能够用来求解部分关利用遗传算法的优化模型。。(Relations can be used to solve some of the optimization model using genetic algorithms. .)
- 2011-02-21 13:17:56下载
- 积分:1
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speed
利用matlab建模的电机控制--双闭环直流调速系统定量仿真(Use of matlab modeling of motor control--double closed loop dc speed control system quantitative simulation
)
- 2012-06-09 14:43:01下载
- 积分:1
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A-Guide-to-MATLAB-Object-Oriented-Programming---A
A Guide to MATLAB Object-Oriented Programming
- 2014-12-04 06:21:50下载
- 积分:1
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treestep
针对视频的运动估计的新三步搜索法,内附源码及实验数据。(Motion estimation for video of the new three-step search method, containing source code and experimental data.)
- 2010-11-23 14:57:30下载
- 积分:1
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BBOSPEA2_Demo
说明: BBO进化算法-基于生物地理学新型进化算法(BBO evolutionary algorithm- a new evolutionary algorithm based on biogeography)
- 2011-03-01 19:34:34下载
- 积分:1