Let X (t) be a wide sense stationary Gaussian random process and form a new process according to Y (t) X (t) cos (t ) where and are constants (a) Is Y (t) wide sense stationary (b) Is Y (t) a Gaussian random process

Question: Let X (t) be a wide sense stationary Gaussian random process and form a new process according to Y (t) = X (t) cos (t

Let X (t) be a wide sense stationary Gaussian random process and form a new process according to Y (t) = X (t) cos (ωt + θ) where ω and θ are constants.
(a) Is Y (t) wide sense stationary?
(b) Is Y (t) a Gaussian random process?

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