# Find the essential bandwidth of rect function? i want the ans by using Energy spectral density and then essential bandwidth… [duplicate]

I am trying to find EBW of rect function but i am unable to solve the integral after finding the fourier transform and then apply parseval's theorem?

• What you did so far? – jojek Mar 29 '15 at 18:28
• What is the essential bandwidth? Is this the same as the Gabor bandwidth? – Dilip Sarwate Mar 29 '15 at 18:53