Fourier series representation of ct Periodic signals a(t=at+r) for all t smallest such T'is the fundamental period 2丌 is the fundamental frequency periodic with period T+w= hwo ()=∑ak=∑ akeJk2mt/T k periodic with period T fak are the Fourier (series) coefficients k=0 DC -k=±1 first harmonic k=±2 second harmonicFourier Series Representatio n of CT Periodic Signals ωo = 2 π T - s m a l l e s t s u c h T is the fundamental period - i s t h e fundamental frequency - periodic with period T - { a k} are the Fourier (series) coefficients - k = 0 D C - k = ±1 first harmonic - k = ±2 second harmonic