Continuous adaptation of a channel equalizer

摘要

The present disclosure is directed to a system and method for continually adapting a channel equalizer that includes a precoder based on changing channel conditions. The precoder is described as being implemented in the exemplary context of a 10GBASE-T physical layer (PHY) device. 10GBASE-T is defined by the Institute of Electrical and Electronics Engineers (IEEE) 802.3an standard and uses four pairs of copper transmission lines to provide an aggregate data rate of 10 gigabits per second. In this exemplary context, the system and method of the present disclosure are configured to exploit an undefined, auxiliary bit in the 10GBASE-T transmission frame to continually send updates to the coefficients of the precoder based on changing channel conditions. The updates can be sent in the transmission frames together with application-level data.

主权项

1. A method for adapting a channel equalizer, the method comprising:
calculating new filter coefficients for a precoder and a feed-forward filter (FFF) that form the channel equalizer; transmitting the new filter coefficients for the precoder, using at least one bit from a plurality of frames, to the precoder, wherein the at least one bit from the plurality of frames is undefined by a communication standard in which the plurality of frames are formatted in accordance with; and after old filter coefficients of the precoder are adapted to the new filter coefficients for the precoder, waiting a set amount of time before further adapting the new filter coefficients for the precoder.