Method and apparatus for training a full-duplex communication link

Patent metadata

Field	Value
Publication number	US-11843483-B2
Application number	US-202217589325-A
Country	US
Kind code	B2
Filing date	Jan 31, 2022
Priority date	Jan 29, 2021
Publication date	Dec 12, 2023
Grant date	Dec 12, 2023

Abstract

During a training procedure for communicating via a full-duplex communication link, a first communication device receives training information from a second communication device. The training information corresponds to first signal processing parameters developed at the second communication device for use by the second communication device to process signals received by the second communication device via the full-duplex communication link. After receiving the training information from the second communication device, the first communication device develops second signal processing parameters to be used by the first communication device to process signals received by the first communication device via the full-duplex communication link. The second signal processing parameters are developed using the training information received from the second communication device.

First claim

What is claimed is:

1. A method for training communication devices for communicating via a full-duplex communication link, the method comprising:
during a training procedure for communicating via the full-duplex communication link, receiving, at a first communication device, training information from a second communication device, the training information corresponding to first signal processing parameters developed at the second communication device for use by the second communication device to process signals received by the second communication device via the full-duplex communication link; and
after receiving the training information, developing, at the first communication device, second signal processing parameters to be used by the first communication device to process signals received by the first communication device via the full-duplex communication link, the second signal processing parameters being developed using the training information that was received from the second communication device and that corresponds to the first signal processing parameters developed by the second communication device for use by the second communication device when the second communication device processes the signals received by the second communication device.

2. The method for training the communication devices of claim 1 , wherein developing the second signal processing parameters comprises:
determining, at the first communication device, initial values of at least some of the second signal processing parameters using the received training information; and
adapting, at the first communication device, the at least some second signal processing parameters from the initial values based on further training signals transmitted by the first communication device or received by the first communication device.

3. The method for training the communication devices of claim 1 , further comprising:
transmitting, by the first communication device, first training signals to the second communication device during a first portion of the training procedure; and
receiving, by the first communication device, second training signals from the second communication device after receiving the training information and during a second portion of the training procedure;
wherein developing the second signal processing parameters further comprises using reception of the second training signals to adapt the second signal processing parameters.

4. The method for training the communication devices of claim 3 , wherein:
receiving the training information from the second communication device comprises receiving equalizer parameter information corresponding to first equalizer coefficients developed by the second communication device to process the signals received by the second communication device via the full-duplex communication link; and
developing the second signal processing parameters comprises developing second equalizer coefficients using the received equalizer parameter information, the second equalizer coefficients to be used by the first communication device to process the signals received by the first communication device via the full-duplex communication link.

5. The method for training the communication devices of claim 3 , wherein:
receiving the training information from the second communication device comprises receiving far-end crosstalk cancellation information corresponding to first far-end crosstalk cancellation parameters developed by the second communication device to process the signals received by the second communication device via the full-duplex communication link; and
developing the second signal processing parameters comprises developing second far-end crosstalk cancellation parameters using the far-end crosstalk cancellation information, the second far-end crosstalk cancellation parameters to be used by the first communication device to process the signals received by the first communication device via the full-duplex communication link.

6. The method for training the communication devices of claim 1 , further comprising:
transmitting, by the first communication device, training signals after receiving the training information;
wherein developing the second signal processing parameters further comprises adapting the second signal processing parameters based on the transmission of the training signals.

7. The method for training the communication devices of claim 6 , wherein at least one of i) and ii):
i) receiving the training information from the second communication device comprises receiving echo cancellation information corresponding to first echo cancellation parameters developed by the second communication device to be used by the second communication device to process the signals received by the second communication device; and developing the second signal processing parameters comprises developing second echo cancellation parameters using the echo cancellation information received from the second communication device, the second echo cancellation parameters to be used by the first communication device to process the signals received by the first communication device; and
ii) receiving the training information from the second communication device comprises receiving near-end crosstalk cancellation information corresponding to first near-end crosstalk cancellation parameters developed by the second communication device to be used by the second communication device to process the signals received by the second communication device; and developing the second signal processing parameters comprises developing second near-end crosstalk cancellation parameters using the near-end crosstalk cancellation information received from the second communication device, the second near-end crosstalk cancellation parameters to be used by the first communication device to process the signals received by the first communication device.

8. A first communication device, comprising:
a transceiver configured to communicate via a full-duplex communication link;
a controller configured to:
receive, during a training procedure for communicating via the full-duplex communication link, training information from a second communication device, the training information corresponding to first signal processing parameters developed at the second communication device for use by the second communication device to process signals received by the second communication device via the full-duplex communication link, and
use the training information to determine initial values of at least some second signal processing parameters for use by one or more signal processors of the first communication device; and

the one or more signal processors of the first communication device being configured to:
adapt the at least some second signal processing parameters from the initial values during the training procedure, the initial values having been determined using the training information received from the second communication device, and
process signals received via the full-duplex communication link based on the adapted at least some second signal processing parameters.

9. The first communication device of claim 8 , wherein:
the controller is configured to control the transceiver to transmit first training signals to the second communication device during a first portion of the training procedure; and
the one or more signal processors are configured to adapt, during a second portion of the training procedure, the at least some second signal processing parameters using second training signals received from the second communication device.

10. The first communication device of claim 9 , wherein:
the controller is further configured to:
receive e

Assignees

• Marvell Asia Pte Ltd

Inventors

• Razavi Majomard Seid Alireza
• Barkeshli Sina

Classifications

• H04L25/03006 Primary

  Arrangements for removing intersymbol interference · CPC title

• H04B3/237

  using two adaptive filters, e.g. for near end and for end echo cancelling · CPC title

• H04B3/238

  using initial training sequence · CPC title

• H04L5/0062

  Avoidance of ingress interference, e.g. ham radio channels · CPC title

• H04L5/14

  Two-way operation using the same type of signal, i.e. duplex · CPC title