A multipoint-to-point, orthogonal frequency division multiplexed (OFDM) communication system is provided. In one embodiment, a system includes: a host unit including a demodulator that simultaneously demodulates upstream information modulated on a plurality of tones within an OFDM waveform, and a plurality...http://www.google.de/patents/US20070157277?utm_source=gb-gplus-sharePatent US20070157277 - MULTIPOINT-TO-POINT COMMUNICATION USING ORTHOGONAL FREQUENCY DIVISION MULTIPLEXING
