The Covariance and Spectral Properties of the Quadrature Components of Narrowband Periodically Non-Stationary Random Signals

The covariance functions and the power spectral densities of the quadrature components for narrowband periodically non-stationary random signal are analysed. The expressions which describe their dependencies on the covariance and spectral components of the signal are obtained. The comparision of the dependencies with a stationary case is carried out.