Rectangular Vectoring Matrix for Crosstalk Mitigation
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Solution Overview
Problem
Crosstalk interference poses significant challenges in Multiple Input Multiple Output (MIMO) wired communication systems, particularly as demand for higher data rates increases, leading to channel ill-conditioning and reduced vectoring gains due to broad frequency spectra and limited vectoring capabilities.
Innovation Solution
A vectoring controller configures a rectangular vectoring matrix to enable direct data communication over a subset of targeted lines while disabling it for a disjoint set of supporting lines, using available power to enhance data signal gains, thereby improving channel conditioning and data rates.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If joint signal processing (vectoring) is applied to all N subscriber lines, then crosstalk mitigation performance is improved, but device complexity and computational load increase significantly
Solution Approach 1:
The invention segments the set of N subscriber lines into two distinct groups: a first set of N-Mk targeted lines that maintain direct data communication, and a second set of Mk supporting lines that have their direct data communication disabled. This segmentation allows the system to apply joint signal processing selectively rather than uniformly across all lines, thereby reducing computational complexity while preserving crosstalk mitigation benefits for the targeted lines.
Solution Approach 2:
The invention applies partial action by disabling direct data communication only on the Mk supporting lines rather than on all N lines. This partial application of the vectoring technique allows the system to achieve improved channel conditioning and crosstalk mitigation with reduced computational burden, as the processing is applied to a subset of lines rather than the complete set.
2Productivity
If broad frequency spectra are used to increase data rates, then productivity is improved, but channel conditioning deteriorates due to increased crosstalk interference
Solution Approach 1:
The invention applies local quality by differentiating the treatment of different lines within the same frequency spectrum. The Mk supporting lines are selectively configured with disabled direct data communication while maintaining their utility for crosstalk cancellation, while the N-Mk targeted lines maintain full data communication capability. This localized differentiation allows the system to operate effectively across broad frequency spectra without suffering from uniform channel degradation.
Data Source
AI summary
A vectoring controller for configuring a vectoring processor that jointly processes DMT communication signals to be transmitted over, or received from, a plurality of N subscriber lines according to a vectoring matrix. In accordance with an embodiment, the vectoring controller is configured, for given ones of a plurality of tones, to enable the given tone for direct data communication over a first set of N−Mk targeted lines out of the plurality of N subscriber lines, and to disable the given tone for direct data communication over a second disjoint set of Mk supporting lines out of the plurality of N subscriber lines, Mk denoting a non-null positive integer. The vectoring controller is further configured to configure the vectoring matrix to use an available transmit or receive power at the given tone over the second set of Mk supporting lines for further enhancement of data signal gains at the given tone over the first set of N−Mk targeted lines.