Unformatted text preview: (b) the signal in ±igure E43 as a sum of shifted semicircles. 4. ±or each of the following functions, decide whether it is periodic and, if it is, Fnd the fundamental period. (a) g ( t ) = 14 + 40 cos(60 πt ) (b) g ( t ) = 28 sin(400 πt ) + 12 cos(500 t ) (c) g ( t ) = sin(3 πt ) + cos(5 πt-3 π 4 ) 5. Compute: (a) the energy of the signal x ( t ) = 2rect( t ) + 1 2 rect( t-1 2 ) (b) the average signal power of the signal x ( t ) = 3 cos(2 πt + 30) (c) the energy of the signal x ( t ) = e (-1-j 8 π ) t u ( t ), where u ( t ) is the unit step function. 1...
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- Summer '08
- Summation, Heaviside step function, Elementary special functions, Rectangular function, Ramp function