Patent ID: 7555049

Claim:
A method of receiving multichannel modulation communications at a receiving modem, comprising the steps of: receiving known signals from a transmitting modem over a communications facility, the received known signals including components in a first plurality of subchannels in the multichannel modulation signal over a first bandwidth; analyzing the received known signals to determine conditions of each of the subchannels in the first bandwidth; responsive to the analyzing step, estimating whether data processing capacity at the receiving modem over a lower frequency subset of the first bandwidth is higher than data processing capacity over the first bandwidth; and responsive to estimating that data processing capacity over the lower frequency subset is higher, configuring the receiving modem to receive payload data over the lower frequency subset of the first bandwidth; configuring comprising: changing a sampling clock frequency for an analog-to-digital converter in the receiving modem from a first sampling frequency corresponding to the highest frequency of the first bandwidth to a second sampling frequency corresponding to the highest frequency of the lower frequency subset of the first bandwidth, the second sampling frequency being at least twice the highest frequency of the lower frequency subset of the first bandwidth.