Patent ID: 9100176
Filing Date: 2015-08-04
Classification: H04B,H04L

Abstract:
1. A method for providing a service over a repeatered link that couples a service provider transceiver to a remote modem, the method comprising: computing, for each frequency bin out of multiple frequency bins of a spectrum, a level of far-end cross-talk (FEXT) interference that is generated to a network-side receiver of a frequency division multiplexing (FDM) discrete multi tone (DMT) repeater by a service provider transmitter that provides an FDM DMT service that is supported by the FDM DMT repeater; computing, for each frequency bins out of the multiple frequency bins, a highest allowable transmit power level of a customer-side transmitter of the FDM DMT repeater, wherein said highest allowable transmit power level is defined as a power level that generates to the network-side receiver of the FDM DMT repeater a cross-talk interference that does not exceed a level of FEXT interference that is generated to the network-side receiver of the FDM DMT repeater by the service provider transmitter; computing, based on a power spectral density (PSD) shape of the network-side receiver input signals, a bitloading map of the network-side receiver and per-bin Signal-to-Noise Ratio of the network-side receiver, a modified PSD shape for downstream customer-side transmitters of the FDM DMT repeaters so that in each of the multiple frequency bins, a value of the modified PSD does not exceed the highest allowable transmit power of that frequency bin; receiving by the network-side receiver of the FDM DMT repeater network-side input signals; generating customer-side output signals that convey a same information as the network-side input signals but have the modified PSD shape; and transmitting to the remote modem the customer-side output signals.