3 Fourier Series Representation of Periodic Signals joo, e aot: Fundamental components e/. e 120ol: Second harmonic components JNOot D- jNOot: Nth harmonic components So, arbitrary periodic signal can be represented as ∞e (Fourier series Example 3.23 Fourier Series Representation of Periodic Signals So, arbitrary periodic signal can be represented as j t j t e e 0 0 ,  −  : Fundamental components j t j t e e 0 0 2 2 ,  −  : Second harmonic components jN t jN t e e 0 0 ,  −  : Nth harmonic components  + =− = k j k t x t ak e 0 ( )  ( Fourier series ) Example 3.2