Reducing the Feedback Overhead During Crosstalk Precoder Initialization
AssigneeFuturewei Technologies, Inc.
InventorsRaphael Jean Cendrillon, Guozhu Long
Life of this patent
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Abstract
An apparatus comprising a receiver coupled to a digital subscriber line (DSL) between an exchange site and a customer premise equipment (CPE) and configured to send a feedback error message to train a precoder coupled to the exchange site, wherein the feedback error message comprises a plurality of error components and an indication of a quantity of bits per error component, a quantization accuracy per error component, or both. Included is a method comprising sending an error feedback message to a DSL crosstalk precoder to train the crosstalk precoder, wherein the error feedback message comprises an error vector and a quantization scaling factor of the error vector.
Claims20
An apparatus comprising:
- a receiver coupled to a digital subscriber line (DSL) between an exchange site and a customer premise equipment (CPE) and configured to send a feedback error message to train a precoder coupled to the exchange site,
- wherein the feedback error message comprises a plurality of error components and an indication of a quantity of bits per error component, a quantization accuracy per error component, or both.
An apparatus comprising:
- at least one processor configured to implement a method comprising:
- determining a range of error for a plurality of error components of a pilot signal;
- determining a quantity of bits for representing error such that a full error range is preserved, a quantization accuracy such that the full error range is represented by a fixed number of feedback bits, or both based on the range of error for the error components;
- transmitting an error feedback signal that comprises the error components and indicates the quantity of bits, the quantization accuracy, or both.
A method comprising:
- sending an error feedback message to a digital subscriber line (DSL) crosstalk precoder to train the crosstalk precoder,
- wherein the error feedback message comprises an error vector and a quantization scaling factor of the error vector.
Dependencies are inferred from the claim text.