轉(zhuǎn)載一個實現(xiàn)分?jǐn)?shù)傅立葉變換的matlab程序,作者信息在程序中有。
A].>.AI uZZU{U9h function FF=frft_PXJ(N,alpha);
@]qBF]6 %matrix
7@6g<"I % FF is the kernel matrix of fractional Fourier transform
S}f?.7 % \copyright: zjliu
-QyhwG= % Author's email:
zjliu2001@163.com gr-fXZO Ts=sqrt(2*pi/N); t=-(N-1)/2:(N-1)/2; t=t'; t=t*Ts;
sz @p_Z/ variance=N/2/pi; HH=zeros(N); HH(:,1)=1; HH(:,2)=2*t;
MWNPPYww for k=3:N;
,+g&o^T HH(:,k)=HH(:,k-1).*t*2-2*(k-2)*HH(:,k-2);
\}~s2Y5j end
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