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DFT
信号与系统试验报告
离散傅立叶变换(DFT)和频谱分析
一、实验内容
1、实验题目
(1)编写DFT、IDFT程序,并验证其正确性(提示:可利用冲激函数进行验证)。
(2)计算信号f(t)=e-at2sin(2∏ft)的离散傅立叶变换(DFT),求其振幅谱,相位谱、振幅最大值对应的频谱(检测主频)以及对发f(t)进行DFT变换的结果实现IDFT变换,并画出图形。
参数选择如下:频率f =30HZ,a=f 2㏑(M),M=2.5
2、通过实验理解信号振幅谱、相位谱的物理意义,掌握DFT、IDFT算法的实现方法。()
- 2008-05-07 10:38:59下载
- 积分:1
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fenzhi
#include <iostream.h>
int main()
{
int i(0),sum(0)
while (i<=100)
{
sum=sum+i
++i
}cout<<"sum="<<sum<<endl
return 0;
}
- 2009-12-11 22:03:44下载
- 积分:1
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BLDCM
这是基于matlab的一个无刷直流电机的仿真模型,效果很好(This is a matlab-based simulation model of brushless DC motor, works well)
- 2010-06-22 13:51:06下载
- 积分:1
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fft2melmx
the convert the audio from the cep unit fft to mel spectrum(the convert the audio from the probes unit fft t o mel spectrum)
- 2007-04-11 11:06:34下载
- 积分:1
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FFT_WINDOW_NEW
快速傅里叶变换法测量两列正弦信号的相位差。(FFT measurement phase)
- 2012-05-22 17:57:21下载
- 积分:1
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mpi_kmeans_
改进的k均值算法,可以加速运行时间,详见Using the Triangle Inequality to Accelerate k-Means(Improved k-means algorithm, can accelerate the running time, see Using the Triangle Inequality to Accelerate k-Means)
- 2008-03-31 16:23:56下载
- 积分:1
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Archive123
EM algorithm for Gaussian mixture. Works on arbitray dimensions with high speed and precision
- 2010-10-28 17:44:03下载
- 积分:1
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real-subroutine-FFT
real subroutine FFT (real subroutine FFT)
- 2011-12-18 21:12:45下载
- 积分:1
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Shape-context1
说明: 自己整理的关于shape context。有matlab代码和word文档,word文档是关于shape context原理的介绍。相当全面。(Their order on the shape context. A matlab code and word document, word document is an introduction on the principles of shape context. Quite comprehensive.)
- 2011-03-05 09:29:35下载
- 积分:1
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mtcx
这个函数用来通过蒙特卡罗求积分,
f 要求的函数;
fail1 积分下限
fail2 积分上限
a,b 积分区域内x的积分上下限
c,d 积分区域内y的最大和最小值,c,d不是必须的参数,但是有之计算速度更快
n 求解迭代次数( This function is used to find the integral Monte Carlo, function f requirements fail1 integral limit fail2 integral upper limit a, regional integration within b limit c on x points, d- the maximum and minimum value of the integration region y, c, d is not required parameters, but the calculation speed is faster n Iteration number)
- 2014-11-12 22:06:09下载
- 积分:1