Patent ID: 7352690

Claim:
A host unit for a multi-point to point communication system, the host unit comprising: a transceiver communicatively coupled with a plurality of remote units in a multi-point to point configuration, the transceiver configured to communicate with the plurality of remote units via an orthogonal frequency division multiple access waveform; a multi-carrier modem coupled to the transceiver and configured to demodulate upstream information data from the orthogonal frequency division multiplexing waveform based on a Fourier transform algorithm, the multi-carrier modem further configured to modulate downstream information data onto the orthogonal frequency division multiplexing waveform based on an inverse Fourier transform algorithm; wherein the multi-carrier modem is further configured to estimate an overall path delay correction based on at least one tone of the orthogonal frequency division multiplexing waveform transmitted by a first remote unit of the plurality of remote units; wherein the transceiver is further configured to transmit the overall path delay correction to the first remote unit; and wherein the multi-carrier modem is further configured to adjust a carrier frequency, a carrier amplitude, and a phase of at least one tone of the plurality of tones such that when any tones are transmitted from the first remote unit and at least one other remote unit of the plurality of remote units, the any tones transmitted from the first remote unit and the at least one other remote unit are orthogonal when received at the host unit.