Guy,
I am doing Signal and System home work..i need some help to confirm if my step were the correct method of doing it... here goes
*Determine whether the signals is periodic? and state its period.
Question 1 :
x(n) = u(n) - u(n-10)
Solution :
x(n) = u(n - T) - u(n - T - 10)
x(n) = u(n - kT) - u(n - lT - 10 )
since l/k cannot be express therefore the signal is not periodic.
Question 2 :
x(n) = sin (n)
Solution :
x(n + T) = sin (n + T)
T = 2 pie
= 2 x 3.142
= 6.238
T is not integer, therefore x(n) = sin (n) is not periodic signal
I am doing Signal and System home work..i need some help to confirm if my step were the correct method of doing it... here goes
*Determine whether the signals is periodic? and state its period.
Question 1 :
x(n) = u(n) - u(n-10)
Solution :
x(n) = u(n - T) - u(n - T - 10)
x(n) = u(n - kT) - u(n - lT - 10 )
since l/k cannot be express therefore the signal is not periodic.
Question 2 :
x(n) = sin (n)
Solution :
x(n + T) = sin (n + T)
T = 2 pie
= 2 x 3.142
= 6.238
T is not integer, therefore x(n) = sin (n) is not periodic signal