Multipoint-to-point communication using orthogonal frequency division multiplexing
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United States of America Patent
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Mar 9, 2010
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app pub date -
Feb 7, 2007
filing date -
Feb 6, 1995
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Abstract
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 of remote units for transmission of upstream information, each remote unit including a modem, the remote units modulating a plurality of tones with upstream information so that when received at the host unit the tones are orthogonal within the OFDM waveform.
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