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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。()
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增加了关闭某条便笺时,记忆某条便笺的位置和大小的功能。
跟随窗体的按钮不再会溢出
改变了帮助文本的样式
在帮助中添加了作者信息
便笺的默认储存位置从原来的 D:\_NOTE_TEMP 更改为了
现在的 D:Program Filesakai_note
优化了使用过程中的说明与提示
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解决了退出编辑状态时,部分时候文本不能换行显示的问题
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在bate2版的基础上:
产品名由原来的 akai_note 改为 ackeline_note
便笺的默认储存位置从原来的 D:Program Filesakai_note
改为:D:Program Filesackeline_note
增加了便笺可以更改颜色的功能,六种颜色随心选!
akai 2011 from PHY. of CCNU 2013-2-22
=========================================(In the version on the basis of bate1:
Increased when closing a bar notes, location and size of the function of memory in a memo.
Follow the form of the button will no longer overflow
Change the help text styles
With the help of information added to
The default storage location notes from the original D: _ NOTE_TEMP change order
Now the D: Program Files akai_note
Optimize the use of the process instructions and tips
Separate storage of temporary files and temporary files folder
Solve the exit edit state, some time can not wrap text display issues
akai 2011 from PHY. of CCNU 2013-2-22
=========================================
Based on the version of the bate2:
Product name changed from the original akai_note ackeline_note
The default storage location notes from the original D: Program Files akai_note
Read: D: Program Fi)
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