SECOND-ORDER CYCLOSTATIONARY APPROACH TO NDA ML SQUARE TIMING ESTIMATION WITH FREQUENCY UNCERTAINTY

摘要

This paper addresses the problem of Non-Data-Aided (NDA) symbol timing error estimation in presence of unknown deterministic carrier frequency errors. A general framework for the stochastic low-SNR ML estimation is derived considering a prior distribution for the carrier frequency error, and exploiting the cyclostationary properties of linear modulations. Finally, the well-known Oerder & Meyr (Square Timing) method is shown to become a particular case of this general solution.