Methods and systems for utilizing low gain low noise signal amplification and ideal taps in coaxial networks

Patent metadata

Field	Value
Publication number	US-10608700-B2
Application number	US-201816128213-A
Country	US
Kind code	B2
Filing date	Sep 11, 2018
Priority date	Sep 11, 2017
Publication date	Mar 31, 2020
Grant date	Mar 31, 2020

Abstract

Systems and methods are provided for utilizing low gain low noise signal amplification and ideal taps in coaxial networks. An ideal tap configured for use in coaxial networks may have a plurality of ports, one or more processing circuits configured for handling reception and transmission of signals communicated via the tap, and one or more echo cancellation circuits configured for providing echo cancellation during operations of the tap. The processing circuits are configured based on particular predefined tap performance criteria. The tap performance criteria may relate to one or more of port-to-port isolation, return loss, port-to-port gain, and up-tilt. The echo cancellation circuits may be configurable for providing the echo cancellation based on the tap performance criteria. The echo cancellation circuits may include an echo cancellation control circuit for controlling echo cancellation functions and/or operations. The echo cancellation circuits may include dedicated per-port echo cancellation circuits.

First claim

What is claimed is:

1. A system, comprising:
a tap configured for use in coaxial networks, the tap comprising:
a plurality of ports;
one or more processing circuits configured for handling reception and transmission of signals communicated via the tap, wherein the one or more processing circuits are configured based on particular predefined tap performance criteria, and wherein the particular predefined tap performance criteria relating to one or more of port-to-port isolation, return loss, port-to-port gain, and up-tilt; and
one or more echo cancellation circuits configured for providing echo cancellation during operations of the tap, wherein:
the one or more echo cancellation circuits comprise an echo cancellation control circuit configurable for controlling echo cancellation functions and/or operations in the tap, and
the echo cancellation control circuit is configured to perform echo cancellation training, to enable determining parameters and/or adjustments applicable to the echo cancellation in the tap.

2. The system of claim 1 , wherein the one or more echo cancellation circuits are configurable for providing the echo cancellation based on the tap performance criteria.

3. The system of claim 2 , wherein the tap performance criteria comprise:
a port-to-port isolation greater than 20 dB between each of two drop ports and/or between any drop tap and an output port of the tap;
a port-to-port gain equal to or greater than 0 dB gain between an input port of the tap and each drop port or the output port of the tap; and
an up-tilt between the input port of the tap and any drop port or the output port of the tap.

4. The system of claim 1 , wherein the echo cancellation control circuit is configured to generate control signals for controlling echo cancellation related functions and/or operations.

5. The system of claim 1 , wherein the echo cancellation control circuit is configured to set or adjust functions of and/or parameters applicable to at least one of the one or more echo cancellation circuits.

6. The system of claim 5 , wherein the parameters comprise echo cancellation coefficients and/or amplification gains.

7. The system of claim 1 , wherein the echo cancellation control circuit is configured to perform the echo cancellation training during inactive transmission periods.

8. The system of claim 7 , wherein the echo cancellation control circuit is configured to perform the echo cancellation training for downstream (DS) communications during inactive upstream (US) periods.

9. The system of claim 1 , wherein the echo cancellation control circuit is configured to utilize downstream (DS) pilot signals for the echo cancellation training for downstream (DS) communications.

10. The system of claim 9 , wherein the echo cancellation control circuit is configured to utilize downstream (DS) pilot signals for continuous tracking of downstream (DS) echo cancellation during echo cancellation training for downstream (DS) communications.

11. The system of claim 1 , wherein the echo cancellation control circuit is configured to perform the echo cancellation training for upstream (US) communications after completion of the echo cancellation training for downstream (DS) communications.

12. The system of claim 1 , wherein the one or more echo cancellation circuits comprise one or more per-port echo cancellation circuits for handling echo cancellation for each of the plurality of ports.

13. The system of claim 12 , wherein the one or more per-port echo cancellation circuits comprise an analog echo cancellation (AEC) circuit.

14. The system of claim 12 , wherein the one or more per-port echo cancellation circuits comprise a summation circuit.

15. The system of claim 12 , wherein the one or more per-port echo cancellation circuits comprise one or more amplifier circuits.

16. The system of claim 1 , wherein the plurality of ports comprise at least:
an input port configured for receiving downstream (DS) signals from, and for transmitting upstream (US) signals to, one or more nodes upstream from the tap within a coaxial network;
an output port configured for transmitting downstream (DS) signals to, and for receiving upstream (US) signals from, one or more nodes downstream from the tap within the coaxial network; and
one or more drop ports for receiving signals from, and for transmitting signals to, customer premise equipment (CPE) in the coaxial network.

17. The system of claim 1 , wherein each port of the plurality of ports is configurable to provide full duplex operation.

18. The system of claim 1 , wherein the tap is configurable to enable remote control of at least some of functions provided or performed in the tap by another node in the coax network.

19. A system, comprising:
a tap configured for use in coaxial networks, the tap comprising:
a plurality of ports;
one or more processing circuits configured for handling reception and transmission of signals communicated via the tap, wherein the one or more processing circuits are configured based on particular predefined tap performance criteria, and wherein the particular predefined tap performance criteria relating to one or more of port-to-port isolation, return loss, port-to-port gain, and up-tilt; and
one or more echo cancellation circuits configured for providing echo cancellation during operations of the tap;
wherein the one or more echo cancellation circuits are configurable for providing the echo cancellation based on the tap performance criteria, and
wherein the tap performance criteria comprise:
a port-to-port isolation greater than 20 dB between each of two drop ports and/or between any drop tap and an output port of the tap;
a port-to-port gain equal to or greater than 0 dB gain between an input port of the tap and each drop port or the output port of the tap; and
an up-tilt between the input port of the tap and any drop port or the output port of the tap.

20. The system of claim 19 , wherein the one or more echo cancellation circuits comprise an echo cancellation control circuit configurable for controlling echo cancellation functions and/or operations in the tap.

21. The system of claim 20 , wherein the echo cancellation control circuit is configured to generate control signals for controlling echo cancellation related functions and/or operations.

22. The system of claim 20 , wherein the echo cancellation control circuit is configured to set or adjust functions of and/or parameters applicable to at least one of the one or more echo cancellation circuits.

23. The system of claim 22 , wherein the parameters comprise echo cancellation coefficients and/or amplification gains.

24. The system of claim 19 , wherein the one or more echo cancellation circuits comprise one or more per-port echo cancellation circuits for handling echo cancellation for each of the plurality of ports.

25. The system of claim 24 , wherein the one or more per-port echo cancellation circuits comprise an analog echo cancellation (AEC) circuit.

26. The system of claim 24 , wherein the one or more per-port echo cancellation circuits comprise a summation circuit.

27. The system of claim 24 , wherein the one or more per-port echo cancellation circuits comprise one or more amplifier circuits.

28. The system of claim 19 , wherein the plurality of ports comprise at least:
an input port configured for receiving downstream (DS

Assignees

• Maxlinear Inc

Inventors

• Krapp Steven John
• Ramesh Sridhar

Classifications

• H04B3/232

  using phase shift, phase roll or frequency offset correction · CPC title

• H04L25/03127

  using only passive components (H04L25/03121 takes precedence) · CPC title

• H04L5/1461

  Suppression of signals in the return path, i.e. bidirectional control circuits · CPC title

• H04B3/235 Primary

  combined with adaptive equaliser · CPC title

• H04L5/143

  for modulated signals (H04L5/1469 takes precedence) · CPC title