System and method for partitioning DSL vector cancellation

摘要

A DSL system performs crosstalk cancellation using a plurality of vectoring cancellation chips that are partitioned into two or more groups based on DSL victim lines or DSL disturber lines or DSL tones. Embodiments of the invention include both single-criteria and double-criteria partitioning methods. In double-criteria embodiments, the vectoring cancellation VCE chips are first partitioned into two or more victim DSL line groups and then in each group the VCE chips are further partitioned by disturber DSL line processing. Alternately, the vectoring cancellation VCE chips are first partitioned into two or more disturber DSL line groups and then within each group further partitioned by victim DSL line processing. By partitioning the computation as described herein, the invention reduces the bandwidth and the number of links between the chips, without too much co-ordination complexity. This allows crosstalk cancellation across larger vectored groups.

主权项

1. A method for performing vectored DSL crosstalk cancellation in a DSL system, the method comprising:
defining D disturber lines in the DSL system; defining V victim lines in the DSL system; defining T DSL tones in the DSL system; partitioning crosstalk cancellation among a plurality of C vectoring cancellation chips by a double criteria; and causing each of the vectoring cancellation chips to perform a partial cancellation based on the double criteria, wherein the double criteria is victim-disturber partitioning, and wherein the victims are first partitioned into Gv groups of a plurality of the V victim lines each, wherein Gv is an integer number of two or more, with each group of V/Gv victims further partitioned based on disturbers among Gd vectoring cancellation chips, wherein Gd is an integer number of two or more, and wherein Gd×Gv=C, and wherein performing the partial cancellation comprises computing by each vectoring cancellation chip, for a given group of the plurality of V/Gv victims, a partial accumulated product for a plurality of D/Gd of the D disturber lines and all tones t=0 to T−1.