Adaptive backchannel equalization

摘要

Techniques for adaptive backchannel equalization. A total equalization value is determined over a preselected training period. A total balance equalization value is determined over the preselected training period. A transmitter equalization coefficient is determined based on the total equalization value and the total balance equalization value. Data is transmitted over a serial link using the transmitter equalization coefficient.

主权项

1. A method comprising:
determining a total equalization value over a training period; determining a total balance equalization value over the preselected training period; determining a transmitter equalization coefficient of a transmitter based on the total equalization value and the total balance equalization value; determining a continuous time linear equalizer (CTLE) peak setting of a receiver, wherein the receiver is coupled to the transmitter; and transmitting data over a serial link based on the transmitter equalization coefficient and the CTLE peak setting, wherein determining the continuous time linear equalizer (CTLE) peak setting comprises determining a continuous time linear equalizer (CTLE) peak value change by:
increasing the CTLE peak value if a first decision feedback equalizer (DFE) tap exceeds a first preselected percentage of maximum capacity; anddecreasing the CTLE peak value if a second DFE tap has an opposite magnitude as the first DFE tap and exceeds a second preselected percentage of the first DFE first tap magnitude.