題組內容

5.(12%) Let f(t) be a periodic signal of period "1"and define the moving-average operator depending on a parameter h ＞ 0 by

(b) (6%) Find the Fourier series for y(t) in terms of the Fourier series for f(t)

Hint: y(t) = f(t)*h(t), h(t) : the impulse response of δ(t)