What does the exponential term mean in Fourier transform

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SUMMARY

The exponential term in the Fourier Transform F(W) of a function f(t) represents the complex generalization of sine and cosine functions found in Fourier series. This term, expressed as exp^{-j w t}, is crucial for understanding how signals can be decomposed into their frequency components. The discussion emphasizes the importance of familiarity with Fourier series when interpreting the role of the exponential factor in the transformation process. Interview questions regarding this topic often assess a candidate's grasp of these fundamental concepts.

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ramdas
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We know that Fourier Transform F(W) of function f(t) is summation from -infinity to +infinity product of f(t) and exp^{-j w t}Here, what does the exponential term mean?
 
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Are you familiar with Fourier series? Because the exponential is simply the (complex) generalization of the sine and cosine that appears in the Fourier series.
 
DrClaude said:
Are you familiar with Fourier series? Because the exponential is simply the (complex) generalization of the sine and cosine that appears in the Fourier series.
sir,Question was asked to me at time of interview.
 
DrClaude said:
Are you familiar with Fourier series? Because the exponential is simply the (complex) generalization of the sine and cosine that appears in the Fourier series.
ramdas said:
sir,Question was asked to me at time of interview.
DrClaude didn't ask where the question came from. He asked whether you were familiar with Fourier series, and gave an explanation for the meaning of the exponential factor in the summation/integral.
 

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