DYNAMIC DIGITAL COMMUNICATION SYSTEM CONTROL
First Claim
1. A method of vectored transmission in a Digital Subscriber Line (DSL) system using Discrete Multi-tone communications over a plurality of communications lines, each of the plurality of communication lines have at least one transmitter and at least one receiver, and wherein cross-talk interference between the plurality of communication lines occurs during transmission, the method comprising:
- providing signals within a plurality of tones to a precoder block,determining parameters of the precoder block using a communication adaptation unit and line and signal characteristics of the plurality of communication lines,pre-distorting the signals within the plurality of tones using the precoder block and the determined parameters, andtransmitting the pre-distorted signals on at least one of the plurality of communication lines, wherein the cross-talk interference is eliminated or reduced by transmission of the pre-distorted signal on the at least one of the plurality of communications lines.
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Accused Products
Abstract
Control of a digital communication system having a plurality of communication lines on which signals are transmitted and received is implemented using a variety of methods and systems. According to one embodiment of the present invention, a method is implemented where the signals are affected by interference during transmission and each of the communication lines has at least one transmitter and at least one receiver. A model is created of the interference characteristics due to the signals carried on the communication lines. Interference characteristics for a line are determined based on the model and actual signals carried on other communication lines different from the line for which the characteristics are being determined. Actual interference is compensated for on the communication line using the determined interference characteristics.
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Citations
24 Claims
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1. A method of vectored transmission in a Digital Subscriber Line (DSL) system using Discrete Multi-tone communications over a plurality of communications lines, each of the plurality of communication lines have at least one transmitter and at least one receiver, and wherein cross-talk interference between the plurality of communication lines occurs during transmission, the method comprising:
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providing signals within a plurality of tones to a precoder block, determining parameters of the precoder block using a communication adaptation unit and line and signal characteristics of the plurality of communication lines, pre-distorting the signals within the plurality of tones using the precoder block and the determined parameters, and transmitting the pre-distorted signals on at least one of the plurality of communication lines, wherein the cross-talk interference is eliminated or reduced by transmission of the pre-distorted signal on the at least one of the plurality of communications lines. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method of vectored transmission for a Digital Subscriber Line (DSL) system, the DSL system using Discrete Multi-tone transmission, wherein the DSL system includes a plurality of communications lines that each have at least one transmitter and at least one receiver, and wherein cross-talk interference occurs between the plurality of communications lines, the method comprising:
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receiving signals within a plurality of tones from at least one of the plurality of communication lines, determining parameters of a canceller block using a communication adaptation unit and line and signal characteristics of the plurality of communication lines, eliminating or reducing, using the canceller block and the determined parameters, crosstalk within each tone of the plurality of tones of the signals received from at least one of the plurality of communication lines, and receiving signals within each tone from the canceller block. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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15. A Digital Subscriber Line (DSL) system for vectored transmission comprising:
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a plurality of transmitters configured and arranged to use Discrete Multi-tone communications over a plurality of communications lines, wherein cross-talk interference between the communication lines occurs during transmission; a precoder block configured and arranged to receive signals within a plurality of tones and to pre-distort the signals within each tone in response to a plurality of parameters, and to provide the pre-distorted signals to at least one of the plurality of transmitters for transmission on at least one of the plurality of communication lines, and a communication adaption unit configured and arranged to determine, based upon line and signal characteristics of the plurality of communication lines, the set of parameters of the precoder block, wherein the crosstalk interference is eliminated or reduced from the pre-distorted signals as transmitted on at least one of the plurality of communications lines. - View Dependent Claims (16, 17, 18, 19, 20)
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21. A Digital Subscriber Line (DSL) system for vectored transmission, the system comprising
a plurality of receivers configured and arranged for Discrete Multi-tone reception of signals within a plurality of tones from a plurality of communications lines, wherein cross-talk interference occurs between the plurality of communications lines, a canceller block configured and arranged to eliminate or reduce crosstalk within each tone of the plurality of tones of the signals received from the at least one of the communication lines, using the canceller block and parameters, and to provide signals within each tone, and a communication adaptation unit configured and arranged to determine the parameters of the canceller block using line and signal characteristics of the plurality of communication lines.
Specification