Fourier Transform

  • Thread starter Larrytsai
  • Start date
  • #1
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Hey I am trying to figure out this easy problem, and I dont know if I am doing this properly or not heres the questions & the work.

x(t) = ae^(bt)*u(-t)

F[x(t)] = a*integral[(e^bt)*e^(-jwt)*dt] upper bound = 0 lower bound = -infinity
= [a*e^(t(b-jw))] / (b-jw)
= a/(b-jw)
 

Answers and Replies

  • #2
ideasrule
Homework Helper
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What's u(-t), and why is it not part of the Fourier transform? Otherwise, your work is correct.
 
  • #3
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u(-t) is the unit step function with a time reversal.
 

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