Question

For each of the continuous time sinusoids below, sampled at spacing Ts = ∆t = 0.015 s, find the values for A, ωˆo (in radians) and θ (in radians) for the sampled version of the signal that has the form:

f [n] = A cos (ωˆo n + θ)

where ωˆo represents the normalized radial frequency (in radians) of the principal zone (principal alias) representation of the sampled sinusoid.

a.) f (t) = 125 cos (100πt + π/6)

b.) f (t) = 110 cos (30πt – π/6)

c.) f (t) = 20 cos (330πt – π/6)

d.) f (t) = 120 cos (360πt − π/6)

e.) f (t) = 20 cos (420πt + π/3)

Answer 1