"Guessing the Periodic Signal"

Supposing we are given a signal x(t)


1) x(t) is real and odd


2) x(t) is periodic with period T = 2 and has Fourier coefficients $ ak $


3) $ ak = 0 $ for |k| > 1


4) $ \frac{1}{2} * \int_{0}^{2} |x(t)|^2 dt = 1 $


We are told to specify two different signals that satisfy the given conditions.

1) since it is odd the function can be a sin wave

2)the signal has a period of 2

3) $ ak $ is always greater than 1 (except 0)

4) w= $ \frac{2*\pi}{2} = \pi $


signal = $ 4*sin(\frac{2\pi}{2} * t) + 4 $

Alumni Liaison

has a message for current ECE438 students.

Sean Hu, ECE PhD 2009