Receiver and transmitter adaptation using stochastic gradient hill climbing with genetic mutation

Patent metadata

Field	Value
Publication number	US-2021344530-A1
Application number	US-202117326032-A
Country	US
Kind code	A1
Filing date	May 20, 2021
Priority date	May 22, 2019
Publication date	Nov 4, 2021
Grant date	—

Abstract

A receiver receives communications over a communication channel, which may distort an incoming communication signal. In order to counter this distortion, the frequency response of the receiver is manipulated by adjusting several frequency response parameters. Each frequency response parameter controls at least a portion of the frequency response of the receiver. The optimal values for the frequency response parameters are determined by modifying an initial set of values for the frequency response parameters through one or more of stochastic hill climbing operations until a performance metric associated with the receiver reaches a local maximum. The modified values are displaced through one or more mutation operations. The stochastic hill climbing operations may subsequently be performed on the mutated values to generate the final values for the frequency response parameters.

First claim

What is claimed is:

1 . A computer-implemented method for equalizing a transmitter, the method comprising:
performing one or more stochastic gradient hill climbing operations and one or more genetic mutation operations on one or more parameters used to equalize a signal transmitted by the transmitter; determining that, in response to the one or more stochastic gradient hill climbing operations and the one or more genetic mutation operations, a figure of merit of an eye diagram associated with a frequency response to the signal at a receiver has reached a local maximum; determining, when the figure of merit is at the local maximum, one or more values for the one or more parameters; and transmitting, to the transmitter, the one or more values for the one or more parameters, wherein at least one equalization operation is performed on the signal at the transmitter based on the one or more values for the one or more parameters.

2 . The computer-implemented method of claim 1 , wherein the one or more values for the one or more parameters are transmitted via a first channel that is separate and distinct from a second channel via which the signal is transmitted by the transmitter.

3 . The computer-implemented method of claim 1 , wherein the one or more parameters are associated with a filter included in the transmitter that filters the signal.

4 . The computer-implemented method of claim 1 , wherein determining the one or more values for the one or more parameters comprises:
setting the one or more parameters to one or more predetermined values; performing a first grid search using a first grid size associated with the one or more predetermined values to select one or more initial values for the one or more parameters; and performing a second grid search that applies a second grid size to a vicinity of the one or more initial values to select one or more final values for the one or more parameters, wherein the second grid size is smaller than the first grid size.

5 . The computer-implemented method of claim 1 , wherein determining the one or more values for the one or more parameters comprises:
performing one or more hill climbing operations to generate a set of locally optimized values associated with the one or more parameters; and displacing one or more values included in the set of locally optimized values to generate a set of mutated values.

Assignees

• Nvidia Corp

Inventors

• Balan Vishnu
• Mobin Mohammad
• Rathi Rohit
• Dai Dai

Classifications

• H04L2025/03636

  Algorithms using least mean square [LMS] · CPC title

• H04L25/03146 Primary

  with a recursive structure (H04L25/03127 takes precedence) · CPC title

• H04L25/03878

  Line equalisers; line build-out devices · CPC title

• H04L27/01 Primary

  Equalisers {(baseband equalizers at the transmitter end H04L25/03343; in analogue transmission systems H04B3/04, H04B7/005)} · CPC title