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chap04
- ch4_1_1:矩形连续函数的傅立叶变换(§4.1.1) ch4_1_2:构建一个矩形函数(§4.1.2) ch4_1_3:对f进行二维快速傅立叶变换(§4.1.2) ch4_1_4:对f进行补零(区域大小为256×256),而后进行二维快速傅立叶变换(§4.1.2) ch4_1_5:使变换结果的零频率分量位于中心,调用函数fftshift(§4.1.2) -ch4_1_1: rectangular continuous function of the Fourier tra
chap04
- matlab实例clearN=100f=zeros(50,50) f(15:35,23:28)=1 figure(1)imshow(f, notruesize )F=fft2(f,N,N) F2=fftshift(abs(F)) figure(2)x=1:N y=1:N mesh(x,y,F2(x,y)) colormap(gray) colorbar-matlab
DSB_FM_TRANSMIT
- Transmit 2 signals via DSB-SC AM Fs= 44.1 KHz , fft fftshift
shift1
- fftshift 比较实数和复数傅里叶变换频谱的不同,以及N取值对其频谱特点的影响。-fftshift more real and complex Fourier transform spectrum of different, and the N values of the characteristics of its spectrum.
matlab-work
- f=zeros(30,30) f(5:24,13:17)=1 imshow(f, notruesize ) F=fft2(f,256,256) F2=fftshift(F) figure,imshow(log(abs(F2)),[-1 5], notruesize ) -f=zeros(30,30) f(5:24,13:17)=1 imshow(f, notruesize ) F=fft2(f,256,256) F2=fftshift
rectanglePulse
- 利用函数建立非负矩形脉冲,然后利用频谱分析函数对该矩形脉冲进行频谱分析,并进行频率移位修正(利用FFTSHIFT),观察该脉冲频谱。-Use function to create a non-negative rectangular pulse, and then use the spectral analysis of the rectangular pulse function spectral analysis, and the frequency shift correction (us
fft2fftshift
- matlab 实现二维fft 并试算fftshift函数的功能 是学者们学习的好帮手-two-dimensional fft matlab fftshift function spreadsheet functions scholars learn good helper
testFFT
- 一个离散傅立叶变换的实例程序。展示了利用Matlab内建fft函数进行频谱分析的过程。给出了幅度频谱和相位频谱。-A discrete Fourier transform demonstration program in Matlab: Fs sampling frequency fft built-in fft function fftshift built-in function to rearrange the output of fft by moving the zero
1
- matlab code for fft& fftshift in image
fftshift-matlab
- 基于matlab的FFT-shift算法设计,以及matlab中符号函数的用法-FFT-Shift Matlab
