Find the signal energy of each of these signals.
(a) x [n] = 2? [n] + 5? [n ? 3]
(b) x [n] = u [n] /n
(c) x [n] = (?1/3)n u [n]
(d) x [n] = cos (?n/3) (u [n] ? u [n ? 6] )
(e) x [n] = n (?1.3)n (u [n] ? u [n ? 6] )
(f) x [n] = 2 (u [n + 2] ? u [n ? 3] ) ? 3tri (n/3)
Solution:
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