Power aware receiver/transmitter adaptation for high speed serial interfaces

Patent metadata

Field	Value
Publication number	US-10298421-B2
Application number	US-201615365337-A
Country	US
Kind code	B2
Filing date	Nov 30, 2016
Priority date	Oct 8, 2014
Publication date	May 21, 2019
Grant date	May 21, 2019

Abstract

A receiver includes first and second equalization modules adapted to provide first and second compensations to a data signal, and a control module including a list that identifies the first equalization module as being less efficient than the second. The control module provides first and second compensation levels of the first and second compensations, such that the first and second compensations operate on the data signal to meet a bit error rate (BER) target, lowers the first compensation to reduce the power consumption of the receiver based on the list, and determines whether, in response to an increase in the level of the second compensation the BER target is met.

First claim

What is claimed is:

1. A receiver, comprising:
a first equalizer that provides a first compensation to a data signal received by the receiver;
a second equalizer that provides a second compensation to the data signal; and
control logic that:
provides a first compensation level of the first compensation and a second compensation level of the second compensation, such that the first compensation level and the second compensation level combine to operate on the data signal to meet a bit error rate (BER) target;
sets the level of the first compensation from the first compensation level to a third compensation level, wherein the third compensation level comprises turning off the first equalizer; and
determines whether, in response to an increase in the level of the second compensation from the second compensation level to a fourth compensation level, a combination of the third compensation level and the fourth compensation level operate on the data signal to meet the BER target.

2. The receiver of claim 1 , wherein the control logic further:
sets the level of the second compensation from the second level to the fourth level when the third compensation level and the fourth compensation level combine to operate on the data signal to meet the BER target.

3. The receiver of claim 1 , wherein the control logic further:
determines that the first compensation level is greater than a first threshold for the first compensation, wherein setting the level of the first compensation is in response to determining that the first compensation level is greater than the first threshold.

4. The receiver of claim 1 , further comprising:
a third equalizer that provides a third compensation to the data signal;
wherein the control logic further:
provides a fifth compensation level of the third compensation, such that the third compensation level, the fourth compensation level, and the fifth compensation combine to operate on the data signal to meet the BER target;
sets the level of the second compensation from the fourth compensation level to a sixth compensation level; and
determines whether, in response to an increase in the level of the third compensation from the fifth compensation level to a seventh compensation level, a combination of the third compensation level, the sixth compensation level, and the seventh compensation level operate on the data signal to meet the BER target.

5. The receiver of claim 4 , wherein the control logic further:
sets the level of the third compensation from the fifth compensation level to a sixth compensation level to reduce a power consumption of the receiver; and
determines whether, in response to an increase in the level of the second compensation from the fourth compensation level to a seventh compensation level, a combination of the third compensation level, the sixth compensation level, and the seventh compensation level operate on the data signal to meet the BER target.

6. The receiver of claim 1 , further comprising:
a communication channel to a transmitter, wherein the transmitter provides a third compensation to the data signal;
wherein the control logic further:
directs, via the communication channel, the transmitter to set a fifth compensation level of the third compensation, such that the third compensation level, the fourth compensation level, and the fifth compensation combine to operate on the data signal to meet the BER target;
sets the level of the second compensation from the fourth compensation level to a sixth compensation level to reduce a power consumption of the receiver; and
determine whether, in response to an increase in the level of the third compensation from the fifth compensation level to a seventh compensation level, a combination of the third compensation level, the sixth compensation level, and the seventh compensation level operate on the data signal to meet the BER target.

7. The receiver of claim 1 , wherein the first equalizer comprises a decision feedback equalization (DFE) equalizer.

8. A method, comprising:
providing, by control logic of a receiver, a first compensation level of a first compensation to a data signal received by the receiver, the first compensation being provided by a first equalizer of the receiver;
providing, by the control logic, a second compensation level of a second compensation to the data signal, the second compensation being provided by a second equalizer of the receiver, wherein the first compensation level and the second compensation level combine to operate on the data signal to meet a bit error rate (BER) target;
setting, by the control logic, the level of the first compensation from the first compensation level to a third compensation level, wherein the third compensation level comprises turning off the first equalizer; and
determining, by the control logic, in response to an increase in the level of the second compensation from the second compensation level to a fourth compensation level, whether a combination of the third compensation level and the fourth compensation level operate on the data signal to meet the BER target.

9. The method of claim 8 , further comprising:
setting, by the control logic, the level of the second compensation from the second level to the fourth level when the third compensation level and the fourth compensation level combine to operate on the data signal to meet the BER target.

10. The method of claim 8 , further comprising:
determining, by the control logic, that the first compensation level is greater than a first threshold for the first compensation, wherein setting the level of the first compensation is in response to determining that the first compensation level is greater than a first threshold.

11. The method of claim 8 , further comprising:
providing, by the control logic, a fifth compensation level of a third compensation to the data signal, the fifth compensation being provided by a third, such that the third compensation level, the fourth compensation level, and the fifth compensation combine to operate on the data signal to meet the BER target;
setting, by the control logic, the level of the second compensation from the fourth compensation level to a sixth compensation level to reduce a power consumption of the receiver; and
determining, by the control logic, whether, in response to an increase in the level of the third compensation from the fifth compensation level to a seventh compensation level, a combination of the third compensation level, the sixth compensation level, and the seventh compensation level operate on the data signal to meet the BER target.

12. The method of claim 11 , further comprising:
setting, by the control logic, the level of the third compensation from the fifth compensation level to a sixth compensation level to reduce a power consumption of the receiver; and
determining, by the control logic, whether, in response to an increase in the level of the second compensation from the fourth compensation level to a seventh compensation level, a combination of the third compensation level, the sixth compensation level, and the seventh compensation level operate on the data signal to meet the BER target.

13. The method of claim 8 , further comprising:
directing, by the control logic, the transmitter to set a fifth compensation level of the third compensation, such that the third compensation level, the fourth compensation level, and the fifth compensation combine to operate on the data signal to meet the BER target;
setting, by the control logic, the level of the second compensation from the fourth compensation level to a sixth compensation level to reduce a power consumption o

Assignees

• Dell Products Lp

Inventors

• Berke Stuart Allen
• Mutnury Bhyrav M
• Wang Minchuan

Classifications

• H04L1/0036

  arrangements specific to the receiver · CPC title

• H04L5/006

  Quality of the received signal, e.g. BER, SNR, water filling · CPC title

• H04L47/29

  using a combination of thresholds · CPC title

• H04L2025/03681

  Control of adaptation · CPC title

• H04L25/03057 Primary

  with a recursive structure (H04L25/03031 takes precedence) · CPC title