Tunable pre-emphasis architecture for downstream data in long-haul PON systems

Abstract

The proposed architecture estimates the pre-emphasis weighting of the transmitter from the waveform monitor in the receiver. This weighting data is stored on the memory, and it makes a quick response to packet data. We evaluated the proposed circuit with a field programmable gate array (FPGA), and it achieved good eye openings with high-speed response for wide degradation conditions.