Fast exchange during intialization in multicarrier communication systems

摘要

Disclosed is a method for initializing multicarrier modems communicating over communication channels. The communication channels have a first plurality of subcarriers. The method includes measuring a signal-to-noise ratio for each subcarrier of the first plurality of subcarriers to determine whether the subcarrier is robust. It also includes sending an initialization message to a receiving multicarrier modem to indicate a second plurality of subcarriers which are robust and using the second plurality of subcarriers to send information from the receiving multicarrier modem.