Crosstalk control method and apparatus using a bandwidth-adaptive precoder interface

A precoder and self-adaptive technology, applied in subscriber line interface circuits, crosstalk reduction, automatic switching office, etc., can solve problems such as limiting system throughput performance, inappropriate, increasing precoder interface bandwidth requirements, etc. Achieve the effect of improving system throughput performance and avoiding quantization error problems

Inactive Publication Date: 2012-09-05
PROVENANCE ASSET GRP LLC
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This arrangement unduly increases the bandwidth requirements on the precoder interface and limits the throughput performance of the system
Moreover, the use of m-bit representations may introduce significant quantization errors into the data applied to the precoder

Method used

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  • Crosstalk control method and apparatus using a bandwidth-adaptive precoder interface
  • Crosstalk control method and apparatus using a bandwidth-adaptive precoder interface
  • Crosstalk control method and apparatus using a bandwidth-adaptive precoder interface

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Embodiment Construction

[0020] The invention will be described herein in connection with an exemplary communication system and related techniques for pre-compensation or other types of crosstalk control in such systems. Crosstalk control can be applied substantially continuously, or in conjunction with adding subscriber lines or other communication channels to the set of active channels in such systems, tracking crosstalk over time, or in other line management applications. It should be understood, however, that the present invention is not limited to use with the particular types of communication systems and crosstalk control applications disclosed. The present invention can be implemented in a wide variety of other communication systems, and in numerous alternative crosstalk control applications. For example, although shown in the context of a DSL system based on DMT modulation, the disclosed techniques can be applied in a straightforward manner to various other types of wired or wireless communica...

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Abstract

In a communication system, a precoder is coupled between first and second portions of each of a plurality of transmitters. The precoder is configured to receive an adaptive index representation of a scaled signal associated with the first portion of a first one of the transmitters, and to process the adaptive index representation using an adjusted precoder coefficient to generate a precompensation signal. The precompensation signal is supplied from the precoder to the second portion of a second one of the transmitters for use in precompensation of at least one signal to be transmitted by the second transmitter.

Description

technical field [0001] The present invention relates generally to communication systems, and more particularly to techniques for mitigating, suppressing, or otherwise controlling interference between communication channels of such systems. Background technique [0002] Multi-channel communication systems often suffer from interference between various channels, which is also known as crosstalk or crosstalk between channels. For example, Digital Subscriber Line (DSL) broadband access systems typically employ Discrete Multi-Tone (DMT) modulation on twisted-pair copper wires. A major drawback in such systems is crosstalk between multiple subscriber lines within the same bundle or between different bundles. Consequently, signals transmitted on one subscriber line may be coupled into other subscriber lines, causing interference that may degrade overall throughput performance. More generally, a given "victim" channel may experience crosstalk from multiple "aggressor" channels, ag...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04B3/32H04L27/34H04M3/00H04M11/06
CPCH04B3/32H04L27/34H04M3/005H04M11/062H04L25/49
Inventor A·J·德林德范维杰恩加尔登
Owner PROVENANCE ASSET GRP LLC
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