Patent ID: 7706349
Filing Date: 2010-04-27
Classification: G06F,H03M,H04B,H04H,H04J,H04K,H04L,H04M,H04N,H04W,Y02D

Abstract:
1. A method for a remote unit of an orthogonal frequency division multiplexing (OFDM) multipoint-to-point communications system, the method comprising: establishing communication between a first remote unit of a plurality of remote units and a host unit, the first remote unit and the plurality of remote units communicatively coupled to the host unit in a multipoint-to-point configuration such that OFDM waveform from distinct remote units of the plurality of remote units combine to a unified OFDM waveform at the host unit; transmitting a plurality of tones from the first remote unit such that tones from the first remote unit and at least one other remote unit of the plurality of remote units are simultaneously received at the host unit, the plurality of tones modulated with upstream information using orthogonal frequency division multiplexing; modulating up to a plurality of tones using a first modulation scheme when transmitting a first type of upstream information; and modulating up to a plurality of tones using a second modulation scheme when transmitting a second type of upstream information.