Patent ID: 9722664
Date: 2017-08-01
CPC Classifications: H04B,H04L,H04M

Claim:
1. A vectoring controller comprising: a memory having computer readable instructions stored thereon; and at least one processor configured to execute the computer readable instructions to, estimate at least one crosstalk coefficient at a given carrier frequency from at least one respective disturber line towards a victim line of a vectoring group, assign at least one crosstalk probing sequence out of a set of orthogonal crosstalk probing sequences to the at least one respective disturber line for modulation at the given carrier frequency of at least one respective sequence of crosstalk probing symbols, receive error samples as successively measured by a receiver coupled to the victim line at the given carrier frequency while the at least one sequence of crosstalk probing symbols are being transmitted over the at least one respective disturber line, and correlate the received error samples with at least one unassigned crosstalk probing sequence out of the set of orthogonal crosstalk probing sequences for detection of a demapping error in the received error samples, the at least one unassigned crosstalk probing sequence being not actively used by any line of the vectoring group during the transmission of the at least one sequence of crosstalk probing symbols over the at least one respective disturber line.