System and method for selecting parameters for compressing coefficients for nodescale vectoring

摘要

In general, the present invention relates to methods and systems for optimizing the precoder coefficient compression parameters for reducing the storage and other demands on a vectored DSL system. Embodiments of the invention can be implemented in conjunction with various existing coefficient compression techniques such as quantization of coefficients and decimation in frequencies. According to certain aspects, the compression parameters (e.g. Golomb modulus and quantization level) are selected for each of a plurality of macrobands so as to optimize the overall data rate of the system for any given channel condition. According to further aspects, the compression parameters are computed to ensure that the compressed coefficients for all macrobands do not exceed the available memory allocated for storing the coefficient data.

主权项

1. A method performed by a processor for optimizing coefficient data for a vectored DSL system, comprising:
identifying a plurality of macrobands in the vectored DSL system; selecting respective coefficient data compression parameters for each of the macrobands, wherein the coefficient data compression parameters specify parameters of one or more data compression schemes used to compress coefficient data from an original number of bits to a lower compressed non-zero number of bits; evaluating performance of the vectored DSL system with the selected coefficient data compression parameters; and optimizing the selecting of the respective coefficient data compression parameters in accordance with a desired system performance as determined by the evaluating, wherein the optimized coefficient data compression parameters of a first one of the macrobands are different than the optimized coefficient data compression parameters of a second one of the macrobands; storing the optimized coefficient data compression parameters in a vectoring module.