MODULATION DIVISION MULTIPLE ACCESS
First Claim
1. A system for receiving information at a network element, comprising:
- a front end operable to;
receive a hierarchical modulated carrier radio frequency signal in a single carrier frequency division multiplexed (SC-FDM) signal, the signal comprising first data intended for the network element modulated using a first modulation layer and second data intended for another network element modulated using a second modulation layer; and
a baseband processor operable to;
recover the first data and the second data; and
process the first data to provide received data for the network element.
1 Assignment
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Accused Products
Abstract
The present invention employs hierarchical modulation to simultaneously transmit information on different modulation layers using a carrier RF signal. Initially, first data to be transmitted is assigned to a first modulation layer and second data is assigned to a second modulation layer. In one embodiment of the present invention, the first and second data are assigned based on reliability criteria. The first and second modulation layers are hierarchical modulation layers of the carrier RF signal. Once assigned, the first data is transmitted using the first modulation layer of the carrier RF signal and the second data is transmitted using the second modulation layer of the carrier RF signal. In one embodiment of the present invention, information may be transmitted to one end user using one modulation layer, and information may be transmitted to a different end user using a different modulation layer.
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Citations
20 Claims
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1. A system for receiving information at a network element, comprising:
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a front end operable to; receive a hierarchical modulated carrier radio frequency signal in a single carrier frequency division multiplexed (SC-FDM) signal, the signal comprising first data intended for the network element modulated using a first modulation layer and second data intended for another network element modulated using a second modulation layer; and a baseband processor operable to; recover the first data and the second data; and process the first data to provide received data for the network element. - View Dependent Claims (2, 3, 4, 5, 6)
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7. A system for transmitting information at a network element, the system comprising:
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at least one communication interface comprising a first antenna and a second antenna; and a control system associated with the at least one communication interface and operable to; receive a plurality of data, each of the plurality of data intended for transmission to a respective network element, the plurality of data comprising at least first data and second data; transmit the plurality of data using a plurality of modulation layers of a carrier signal such that each modulation layer is; a hierarchical modulation layer of the carrier signal; and associated with at least one of the plurality of data; and wherein the first data is transmitted using the first and second antennas and the second data is transmitted using only the first antenna. - View Dependent Claims (8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification