PAM-Based Timing Synchronization for ARTM Modulations

ITC/USA 2008 Conference Proceedings / The Forty-Fourth Annual International Telemetering Conference and Technical Exhibition / October 27-30, 2008 / Town and Country Resort & Convention Center, San Diego, CaliforniaA reduced-complexity decision-directed timing recovery method for continuous phase modulation (CPM) is presented. The timing recovery method is based on the pulse amplitude modulation (PAM) representation - or Laurent representation - of CPM, and is applied to the family of three telemetry modulations: PCM/FM, SOQPSKTG, and ARTM CPM. This work is the next step in an ongoing effort to develop reduced-complexity PAM-based receiver methods for aeronautical telemetry. We quantify the steady-state tracking accuracy of the proposed timing recovery method and show that it performs very close to the theoretical limit given by the modified Cramer-Rao bound (MCRB).We also demonstrate that the proposed method is free of false-lock points for all three modulations.International Foundation for TelemeteringProceedings from the International Telemetering Conference are made available by the International Foundation for Telemetering and the University of Arizona Libraries. Visit http://www.telemetry.org/index.php/contact-us if you have questions about items in this collection