SYSTEMS AND METHOD FOR ORTHOGONAL FREQUENCY DIVISIONAL MULTIPLEXING
First Claim
1. A multi-carrier modem, the modem comprising:
- a receiver configured to receive a waveform comprising a plurality of spectrally overlapping carrier signals from at least two of a plurality of remote units, wherein the plurality of spectrally overlapping carrier signals are modulated using an inverse Fourier transform algorithm;
a transmitter;
a processor coupled to the transmitter, wherein the processor outputs data for transmission to the transmitter, wherein the processor applies an inverse Fourier transform algorithm to the data provided to the transmitter;
a controller programmed to instruct the transmitter to transmit one or more timing adjustments to the at least two of the plurality of remote units, wherein the timing adjustments instruct the at least two of the plurality of remote units to adjust a transmission timing so that transmitted symbols associated with frames of a predetermined multiframe structure are received in a sequence from the at least two of the plurality of remote units based on the predetermined multiframe structure.
3 Assignments
0 Petitions
Accused Products
Abstract
Systems and methods for orthogonal frequency division multiplexing are provided. In one embodiment, a multi-carrier modem comprises: a receiver configured to receive a waveform comprising a plurality of spectrally overlapping carrier signals from at least two of a plurality of remotes, the carrier signals are modulated using an inverse Fourier transform; a transmitter; a processor coupled to the transmitter, the processor outputs data for transmission to the transmitter, the processor applies an inverse Fourier transform to the data provided to the transmitter; a controller programmed to instruct the transmitter to transmit timing adjustments to the at least two of the plurality of remotes, the timing adjustments instruct the at least two of the plurality of remotes to adjust transmission timing so that transmitted symbols associated with frames of a predetermined multiframe structure are received in sequence from the at least two of the plurality of remotes based on the structure.
141 Citations
6 Claims
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1. A multi-carrier modem, the modem comprising:
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a receiver configured to receive a waveform comprising a plurality of spectrally overlapping carrier signals from at least two of a plurality of remote units, wherein the plurality of spectrally overlapping carrier signals are modulated using an inverse Fourier transform algorithm; a transmitter; a processor coupled to the transmitter, wherein the processor outputs data for transmission to the transmitter, wherein the processor applies an inverse Fourier transform algorithm to the data provided to the transmitter; a controller programmed to instruct the transmitter to transmit one or more timing adjustments to the at least two of the plurality of remote units, wherein the timing adjustments instruct the at least two of the plurality of remote units to adjust a transmission timing so that transmitted symbols associated with frames of a predetermined multiframe structure are received in a sequence from the at least two of the plurality of remote units based on the predetermined multiframe structure. - View Dependent Claims (2, 3, 4, 5, 6)
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Specification