Fourier transform of hat function

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SUMMARY

The Fourier transform of the hat function, defined as h(x) = 1 for |x| ≤ 1 and 0 otherwise, is correctly calculated as F(k) = sqrt(2/PI) * sinc(k). This result is derived using the integral F(k) = (1/sqrt(2*PI)) * ∫ from -1 to 1 of exp(ikx) dx. The discussion confirms the validity of this transformation, referencing the rectangular function for further clarification.

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captainjack2000
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Homework Statement


obtaining the Fourier transform of the hat function
h(x) = 1 if modulus of x</= 1
=0 otherwise


Homework Equations


F(k)=1/sqrt(2*PI) *integral from -1 to 1 of exp(ikx)


The Attempt at a Solution


I've carried through the transform and got an answer of
sqrt(2/PI)*sinc(k)
could someone tell me if this is correct please?
 
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captainjack2000 said:
obtaining the Fourier transform of the hat function
h(x) = 1 if modulus of x</= 1
=0 otherwise

F(k)=1/sqrt(2*PI) *integral from -1 to 1 of exp(ikx)

Hi captainjack2000! :smile:

(have a pi: π and a ≤ and a √ and an ∫ and try using the X2 tag just above the Reply box :wink:)

Yes, that looks good … see http://en.wikipedia.org/wiki/Rectangular_function :wink:
 

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