Signal processing method and apparatus, and communication system

Patent metadata

Field	Value
Publication number	US-12538053-B2
Application number	US-202318328156-A
Country	US
Kind code	B2
Filing date	Jun 2, 2023
Priority date	Dec 7, 2020
Publication date	Jan 27, 2026
Grant date	Jan 27, 2026

Abstract

A signal processing method and apparatus, and a communication system, and relates to the field of communication technologies. The method includes: a processing unit of a first device first determines a distortion parameter of an eye pattern of a first PAM-N signal transmitted by a transmitting unit in the first device, then performs anti-distortion preprocessing on a second PAM-N signal using an equalizer based on the distortion parameter, to obtain a third PAM-N signal, and controls the transmitting unit to transmit the third PAM-N signal. The distortion parameter is for reflecting a tilt status of the eye pattern, and N≥2. The equalizer is used to perform anti-distortion preprocessing on the second PAM-N signal to obtain the third PAM-N signal.

First claim

What is claimed is:

1 . A signal processing method, comprising:
determining a distortion parameter of an eye pattern of a first pulse amplitude modulation (PAM)-N signal transmitted by a transmitting unit in a first device, wherein the distortion parameter is for reflecting a tilt status of the eye pattern, and N≥2; setting coefficients of an equalizer based on the distortion parameter, wherein the equalizer is configured to perform anti-distortion preprocessing on a sampled signal; performing, using the equalizer, anti-distortion preprocessing on a second PAM-N signal, to obtain a third PAM-N signal; and controlling the transmitting unit to transmit the third PAM-N signal; wherein N≥2, each bit UI of the eye pattern comprises N−1 eye regions, and the distortion parameter is for reflecting relative positions of the N−1 eye regions; the N−1 eye regions comprise a first eye region and N−2 second eye regions, and the first eye region is any eye region of the N−1 eye regions; and the distortion parameter comprises: an included angle between a horizontal coordinate axis or a vertical coordinate axis of the eye pattern and a straight line on which a center of each of the second eye regions and a center of the first eye region are located.

2 . The signal processing method according to claim 1 , wherein the first device comprises a digital-to-analog converter, and the digital-to-analog converter is configured to perform sampling on an initial signal, to obtain the second PAM-N signal; and
before performing, using the equalizer, the anti-distortion preprocessing on the second PAM-N signal to be transmitted by the transmitting unit, the method further comprises: obtaining the second PAM-N signal obtained by the digital-to-analog converter.

3 . The signal processing method according to claim 1 , wherein the N−1 eye regions comprise a first eye region and N−2 second eye regions, and the first eye region is any eye region of the N−1 eye regions; and
the distortion parameter comprises: in a horizontal coordinate direction of the eye pattern, a distance between a center of each of the second eye regions and a center of the first eye region.

4 . The signal processing method according to claim 3 , wherein the second PAM-N signal has N levels, the coefficients of the equalizer comprise N groups of coefficients that are in a one-to-one correspondence with the N levels, and a group of coefficients corresponding to an i th level in the N levels that are arranged in descending order comprise: (a i , 1, -a i );
when i<x, a i =h i ; when i=x, a i =h i−1 /y; when i=x+1, a i =h i /y; and when i>x+1, a i =h i−1 , wherein 1≤i≤N, 1≤x≤N−1, y>1, the N−1 eye regions are in a one-to-one correspondence with first N−1 levels in the N levels that are arranged in descending order, and in a vertical coordinate direction of the eye pattern, an eye region corresponding to the i th level is located between the i th level and an (i+1) th level; an eye region corresponding to an x th level in the N levels that are arranged in descending order is the first eye region; and hi is a distance between a center of the eye region corresponding to the i th level and a center of the eye region corresponding to the x th level in the horizontal coordinate direction.

5 . The signal processing method according to claim 4 , wherein y=2 or 3.

6 . The signal processing method according to claim 3 , wherein
when N is an odd number, the first eye region is a ((N+1)/2) th eye region in a target direction in the N−1 eye regions; or when N is an even number, the first eye region is a (N/2) th eye region in a target direction in the N−1 eye regions; and the target direction is the vertical coordinate direction of the eye pattern, or an opposite direction of the vertical coordinate direction.

7 . The signal processing method according to claim 1 , wherein the setting coefficients of the equalizer based on the distortion parameter, the method further comprises:
determining that the distortion parameter meets a target condition.

8 . The signal processing method according to claim 1 , wherein the first device comprises a receiving unit, and the method further comprises:
when the transmitting unit is connected to the receiving unit, obtaining the first PAM-N signal that is transmitted by the transmitting unit and received by the receiving unit.

9 . The signal processing method according to claim 1 , wherein the first device comprises the receiving unit, and determining the distortion parameter of the eye pattern of the first PAM-N signal transmitted by the transmitting unit in the first device further comprises:
receiving, using the receiving unit, the distortion parameter sent by a second device, wherein the first PAM-N signal is a signal transmitted by the transmitting unit to the second device.

10 . A signal processing method, comprising:
receiving a first pulse amplitude modulation (PAM)-N signal transmitted by a first device; determining a distortion parameter of an eye pattern of the first PAM-N signal; and sending the distortion parameter to the first device, so that the first device processes a to-be-transmitted signal based on the distortion parameter; wherein N>2, each bit UI of the eye pattern comprises N−1 eye regions, and the distortion parameter is for reflecting relative positions of the N−1 eye regions; the N−1 eye regions comprise a first eye region and N−2 second eye regions, and the first eye region is any eye region of the N−1 eye regions; and the distortion parameter comprises: an included angle between a horizontal coordinate axis or a vertical coordinate axis of the eye pattern and a straight line on which a center of each of the second eye regions and a center of the first eye region are located.

11 . A communication device, wherein the communication device comprises a transmitting unit and a processing unit, wherein
the transmitting unit is configured to transmit a first pulse amplitude modulation (PAM)-N signal, and N≥2; the processing unit is configured to: determine a distortion parameter of an eye pattern of the first PAM-N signal, wherein the distortion parameter is for reflecting a tilt status of the eye pattern; set coefficients of an equalizer based on the distortion parameter, wherein the equalizer is configured to perform anti-distortion preprocessing on a sampled signal; perform, using the equalizer, anti-distortion preprocessing on a second PAM-N signal, to obtain a third PAM-N signal; and control the transmitting unit to transmit the third PAM-N signal; and the transmitting unit is further configured to transmit the third PAM-N signal; wherein N≥2, each bit UI of the eye pattern comprises N−1 eye regions, and the distortion parameter is for reflecting relative positions of the N−1 eye regions; the N−1 eye regions comprise a first eye region and N−2 second eye regions, and the first eye region is any eye region of the N−1 eye regions; and the distortion parameter comprises: an included angle between a horizontal coordinate axis or a vertical coordinate axis of the eye pattern and a straight line on which a center of each of the second eye regions and a center of the first eye region are located.

12 . The communication device according to claim 11 , wherein the communication device further comprises a digital-to-analog converter configured to perform sampling on an initial signal to obtain the second PAM-N signal.

13 . The communication device according to claim 11 , wherein the N−1 eye regions comprise a first eye region and N−2 second eye regions, and the first eye region is any eye region of the N−1 eye

Assignees

• Huawei Tech Co Ltd

Inventors

• Tian Yu
• Wang Donglin

Classifications

• H04Q2213/03

  PAM · CPC title

• H04Q2011/0088

  Signalling aspects · CPC title

• H04B10/50

  Transmitters · CPC title

• H04Q11/0067 Primary

  Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring · CPC title

• H04B10/541 Primary

  Digital intensity or amplitude modulation · CPC title