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Generalized almost-cyclostationary signals on multipath Doppler channels

In this paper, the effects of multipath Doppler channels on the very recently introduced generalized almost-cyclostationary signals are analyzed. Multipath Doppler channels generate several replicas of the input signal, each characterized by a different complex amplitude, delay, time-scaling factor, and Doppler shift. It is shown that such channels can be modeled as linear almost-periodically time-variant or as linear time-variant systems, depending on the length of the collect time adopted in the measurements.