On the Spectral Density of a Cyclostationary Process

A new approach to the spectral-density concept of a cyclostationary process is presented. This approach is based on the observation that a cyclostationary process can be split into a number of wide-sense stationary subprocesses. The spectral densities of these subprocesses, defined as the Fourier transform of their autocorrelation functions, are nonoverlapping functions of frequency. The sum of the spectral densities of these wide-sense stationary subprocesses yields the well-known expression for the spectral density of a cyclostationary process.