Question

Answer 1

Q.1 Differentiate between Discrete time signal and Continuous time signal. How they are represented? Provide some real life examples.

 

Q.2 Define the following signals: (Also provide some suitable example)

i)                   Periodic and Non-periodic signal.

ii)                Even and Odd signal.

 

Q.3.  For the following signals, determine analytically which are periodic (if periodic, give the period)

 

a)     x(t) = 4 cos(5t)

b)    x(t) = 4 cos(5t-/4)

c)     x(t) = 4u(t) + 2sin(3t)

d)    x(t) = u(t) - ½

e)     x[n] = 4 cos(n)

f)      x[n] = 4cos(n-2)

g)      x[n] =  2sin(3n)

 

Q.4.   Determine if the following signals are periodic; if periodic, give the period.

 

a)     x(t) = cos(4t) + 2sin(8t)

b)    x(t) = 3cos(4t) + sin(t)

c)     x(t) = cos(3t) + 2cos(4t)