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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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sudo7matlab
说明: 這是一個求數獨遊戲的m-file
在matlab的命令窗口
鍵入>> sudo7
或者run sudo7 的m-file
之後在 9x9 的方格內 填入 數獨的問題
按下 "計算是否有解" 的功能鍵
若不是存在多組的解,則可以
按下 "顯示結果" 的功能鍵,
也可以載入作者測試的"date1"或"date2"
但不可載入及修改"condition"(This is a Sudoku game for the m-file in matlab command window type>> sudo7 or run sudo7 the m-file after the box in the 9x9 Sudoku Fill in the question of pressing the calculate whether the solvability feature key if it were not for the existence of multiple solutions, you can press the show results of the function keys can also be included in the authors test date1 or date2 but not loading and modification of condition )
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