High-speed burst synchronization in Ethernet PON system

摘要

Synchronization is one of the difficult problems in realization of Ethernet PON receiver, because the bit rate is as high as 1.25Gb/s and the receivers works in burst mode. Burst mode synchronization relates to two key techniques: ranging and phase adjustment. For these two key techniques, this paper puts forward a ranging flow for the Ethernet PON system and a novel burst mode synchronization circuit running at 1.25Gbps. Using VHDL, the algorithm and the structure of ranging could be realized, and the result of simulation is provided. The performance of the ranging flow is compared for the different collision resolution algorithm. At the same time, the feasibility and the performance of a high speed burst synchronization circuit are presented with the simulation result.