Synchronization refers to processing at the receiver-side of a digital communication link, in order to recover optimal sampling times and compensate for frequency and phase offsets induced by physical components. In optical communication systems, the design of synchronization algorithms is especially challenging due to extremely high baud rates, minimal dedicated processing capabilities, stringent latency constraints, and hardware deficiencies. This is further exacerbated by the presence of fiber non-linearity and time-varying dispersive phenomena. Little is known regarding the optimal functionality and design of synchronization algorithms for these systems, since most current research disregards synchronization and the impact of synchronization errors.
Our goal is to develop a holistic optical receiver, optimally integrating synchronization with other receiver tasks (e.g., equalization, data detection).
Our objectives are to
study current synchronization algorithms and determine their operational regimes;
derive fundamental performance bounds for synchronization algorithms, as a performance benchmark;
develop optimal synchronization algorithms and compare with the fundamental performance bounds; and
develop and evaluate sub-optimal, low-complexity synchronization algorithms, operational under realistic operating conditions.
Forskningen sker i samarbete med forskningscentrum FORCE.