... the duality property to be more symmetrical For instance, Figs (d), (e), and Chapter 11- Fourier Transform Pairs Time Domain 211 Frequency Domain 2 b Real Part a Impulse at x[0] c Imaginary part ... that the signal is aliased sin(BkM / N ) Mag X [ k] ' /0 /0 00 sin(Bk /N ) 00 Chapter 11- Fourier Transform Pairs Time Domain 213 Frequency Domain 20 a Rectangular pulse b Magnitude Phase (radians) ... sinc function For continuous signals, the rectangular pulse and the sinc function are Fourier transform pairs For discrete signals this is only an approximation, with the error being due to aliasing...