Fast adaptive mode-conversion digital canceller

摘要

Transceivers and methods able to recover within less than 1 millisecond from quality degradation in the transceiver's operating point, including: receiving a signal from a second transceiver, using an adaptive digital equalizer and canceller (ADEC) to generate a slicer input signal, and generating slicing decisions and slicing errors that are used to adapt the ADEC. Shortly after identifying quality degradation in the transceiver's operating point, indicating the second transceiver to transmitting known data. And within less than 1 millisecond from identifying the quality degradation, the transceiver utilizes the known data to improve the accuracy of the slicing errors, which enables fast adaptation of the ADEC that improves the quality in the transceiver's operating point to a level that enables the transceiver to indicate the second transceiver to transmit data.

主权项

1. A transceiver configured to recover within less than 1 millisecond from quality degradation in its operating point, comprising:
a receiver analog front end (Rx AFE), an adaptive module comprising at least one of an adaptive digital equalizer and an adaptive digital canceller (ADEC), and a slicer; the Rx AFE receives a signal of more than 500 Mbps from a second transceiver over a link, and feeds the signal to the ADEC that generates a slicer input signal; the slicer utilizes the slicer input signal to generate slicing decisions and slicing errors; wherein the slicing errors are used to adapt the ADEC; shortly after identifying quality degradation in the transceiver's operating point, the transceiver indicates the second transceiver to transmitting known data; and within less than 1 millisecond from identifying the quality degradation, the transceiver utilizes the known data to improve the accuracy of the slicing errors, which enables fast adaptation of the ADEC, that improves the quality in the transceiver's operating point to a level that enables the transceiver to indicate the second transceiver to transmit data.