公开(公告)号：US20190036614A1

公开(公告)日：2019-01-31

申请号：US16151094

申请日：2018-10-03

Applicant: INPHI CORPORATION

Inventor： Damián Alfonso MORERO ,  Mario Rafael HUEDA ,  Oscar Ernesto AGAZZI

IPC: H04B10/61 ,  H04L1/00 ,  H04B10/079

Abstract: A method and structure for signal propagation in a coherent optical receiver device. Asynchronous equalization helps to reduce complexity and power dissipation, and also improves the robustness of timing recovery. However, conventional devices using inverse interpolation filters ignore adaptation algorithms. The present invention provides for forward propagation and backward propagation. In the forward case, the filter input signal is forward propagated through a filter to the adaptation engine, while, in the backward case, the error signal is backward propagated through a filter to the asynchronous domain. Using such forward and backward propagation schemes reduces implementation complexity while providing optical device performance.