US 12,021,670 B2 · Equalization in high-speed data channel having sparse impulse response

Abstract

A physical layer transceiver, for connecting a host device to a wireline channel medium that is divided into a total number of link segments, includes a host interface for coupling to a host device, a line interface for coupling to the wireline channel medium, and feed-forward equalization (FFE) circuitry operatively coupled to the line interface to add back, into a signal, components that were scattered in time. Respective individual filter segments are selectably configurable, by adjustment of respective delay lines, to correspond to respective individual link segments. The FFE circuitry also includes control circuitry configured to detect a signal energy peak in at least one particular link segment and, upon detection of the signal energy peak in the particular link segment, configure a respective one of the respective individual filter segments, by adjustment of a respective delay line, to correspond to the respective particular link segment.

Claims22

Dependent claims

An automotive physical layer transceiver for connecting an automotive functional module to an automotive wireline channel medium that is divided into a total number of link segments and is subject to reflections at varying locations at least from one or both of (a) kinking or bending in an automotive environment, or (b) connectors, the physical layer transceiver comprising:

a device interface for coupling to the automotive functional module;
a line interface for coupling to the automotive wireline channel medium;
and
rover filter circuitry for selectably filtering interference cause by the reflections at the varying locations, the rover filter circuitry comprising:
a plurality of rover filter segments each of which is selectably configurable, using a respective delay line, to filter a respective selectable link segment of the total number of link segments, and
control circuitry configured to:
detect, in at least one particular link segment of the total number of link segments, a signal energy peak from one of the reflections, by selectively advancing an unused rover filter segment of the plurality of rover filter segments through the link segments by adjustment of the respective delay line of the unused rover filter segment, and measuring transmission conditions of link segments of the total number of link segments as the unused rover filter segment passes through the link segments, and
configure one of the rover filter segments to filter the particular link segment where reflection interference is occurring.

5 more elements

A method of filtering an automotive wireline channel medium that is divided into a total number of link segments and is subject to reflections at varying locations at least from one or both of (a) kinking or bending in an automotive environment, or (b) connectors, and rover filter circuitry for filtering interference caused by the reflections at the varying locations, the rover filter circuitry including a plurality of rover filter segments each of which is selectably configurable, using a respective delay line, to filter a respective selectable link segment of the total number of link segments, the method comprising:

detecting, in at least one particular link segment of the total number of link segments, a signal energy peak from one of the reflections, by selectively advancing an unused rover filter segment of the plurality of rover filter segments through the link segments by adjustment of a respective delay line, and measuring transmission conditions of link segments of the total number of link segments as the unused rover filter segment passes through the link segments;
and
configuring one of the rover filter segments to filter the particular link segment where reflection interference is occurring.

An automotive network, comprising:

an automotive wireline channel medium that is divided into a total number of link segments and is subject to reflections at varying locations at least from one or both of (a) kinking or bending in an automotive environment, or (b) connectors;
and
a plurality of automotive physical layer transceivers coupled to the automotive wireline channel medium, each respective one of the plurality of automotive physical layer transceivers including:
a respective device interface for coupling to an automotive functional module;
a respective line interface for coupling to the automotive wireline channel medium;
and
rover filter circuitry for selectably filtering interference caused by the reflections at the varying locations, the rover filter circuitry comprising:
a plurality of rover filter segments each of which is selectably configurable, using a respective delay line, to filter a respective selectable link segment of the total number of link segments, and
control circuitry configured to:
detect, in at least one particular link segment of the total number of link segments, a signal energy peak from one of the reflections, by selectively advancing an unused rover filter segment of the plurality of rover filter segments through the link segments by adjustment of the respective delay line of the unused rover filter segment, and measuring transmission conditions of link segments of the total number of link segments as the unused rover filter segment passes through the link segments, and
configure one of the rover filter segments to filter the particular link segment where reflection interference is occurring.

8 more elements

Dependencies are inferred from the claim text.

Equalization in high-speed data channel having sparse impulse response

Life of this patent

Equalization in high-speed data channel having sparse impulse response

Life of this patent

Abstract

Claims22