Info fourier

8QLYHUVLGDGGH6DQWLDJRGH&KLOH )DFXOWDGGH&LHQFLDV

'HSWRGH0DWHPiWLFD\&RPSXWDFLyQ

&iOFXOR$YDQ]DGR*XtD

$2EWHQHUODVHULHGH)RXULHUGH\ I[[>SS@SHULyGLFDGHSHULRGRS VL  I[ [  I[ [  S d [  d [d S   ¦
f 



f 5  Q ¦ FRV Q[   Q 

 Q  VHQ Q[   Q

 I[

 ¦
f 

 VHQ Q   [  5 Q   

 I[ H[   I[ °[¨   I[  5  [ 
 



H 5  H 5  f  H 5  H 5   ¦ FRV Q[  Q VHQ Q[ 5 5   Q 5 5 f FRVQ  [   ¦    Q   



f    Q   5  ¦ FRV Q[   Q 

 I[  H

[

 S d [ 

H5    f  Q H5     ¦ FRV Q[    Q 5 5  5 f  Q    Q    ¦ FRV Q[  VHQ Q[    5 Q Q  5  ¦
f 

 I[ 

[d [d S

 I[  5  [ 

 Q VHQ Q[  Q%2EWHQHUVHULHGH)RXULHU\ I[[ >SS@ SHULyGLFDGHSHULRGRSS ƒ ILMRVL  I  [   [  [  > @    d [ d    [ d        5 

¦
f 

FRVQ  5 [  Q   

 I [

 f    Q   ¦ VHQ Q5 [    Q5

d [   I [ 

[ d [d 

   ¦
f 

 5

FRVQ  

5[    VHQ Q5 [  Q   5 Q

 I  [ H

[

  d [ d  

H   f  Q H  H    ¦ FRV Q5 [  Q5 VHQ Q5 [  H   Q 5  

òd [   I [  H [ d [dò  I  [ [  [  > @ 

H   Q     H   ¦  FRVQ5 [  Q5 VHQQ5 [       Q 5 
  f 

 f  Q   ¦ VHQQ5 [  Q 5 

 I [

d [ d [d 





 f VHQQ  5 [  ¦ Q   5 

8QLYHUVLGDGGH6DQWLDJRGH&KLOH )DFXOWDGGH&LHQFLDV

'HSWRGH0DWHPiWLFD\&RPSXWDFLyQ

&iOFXOR$YDQ]DGR*XtD...