TDMA Timing Loops for High Data Rate Systems.
W. G. Swarner, C. W. Chuang, R. J. Huff, H. S. Eilts · 1978
Optimum linear recursive filtering techniques are applied to achieve system synchronization for a high data rate bit synchronous TDMA satellite or relay communications system employing two sampled data delay lock loops at each terminal to establish receive clock and transmit timing relative to a system clock at the satellite or relay. It is shown that a system employing an optimum filter in the receive clock loop with open loop coupling to a separate ranging loop for transmit timing can provide synchronization adequate for a 40 Mbit/s system containing highly maneuverable airborne terminals or relays. Filter models for system timing are developed and analyzed, simulation data are presented to verify and augment the analytical results, and design curves and equations applicable to receive-only as well as transmit-receive synchronization for systems containing maneuvering terminals or maneuvering relays are given. (Author)