Patent ID: 8588286
Filing Date: 2013-11-19
Classification: H04B,H04L

Abstract:
1. A method of cancelling alien noise, comprising: estimating spatial cross-correlation and computing alien noise prediction filter coefficients for at least a portion of received training symbols, wherein a noise observed per subcarrier on at least a plurality of coordinated digital subscriber line (DSL) lines is arranged as a vector for each of said training symbols; arranging said noise vectors for multiple training symbols in a matrix {tilde over (Z)} wherein m is a subcarrier and N orthonormally transforming said matrix {tilde over (Z)} wherein Q computing alien noise prediction filter coefficients from said triangular matrix; and applying said computed alien noise prediction filter coefficients to an incoming data symbol during data transmission to calculate correlated alien noise terms per subcarrier for plurality of coordinated DSL lines, wherein said alien noise is substantially mitigated by removing said calculated correlated noise from said incoming data symbol.