(i) Derive the complex Fourier Series of f(t). [6 marks]

(ii) From the complex Fourier Series of f(t) obtained from (i), deduce the trigonometrical Fourier Series of f(t) and hence sketch its magnitude spectrum up to the 5th harmonic. [4 marks]

 
 

(a) One time period of a periodic signal f(t) is shown in Figure Qla below. f(t)/V -4 -2 4 t/ms Figure Qla