Modulation division multiple access
First Claim
1. A method for transmitting information to at least one user element from at least one communication interface comprising:
- receiving first data intended for transmission to a first receiver via first and second antennas of the at least one communication interface and second data intended for transmission to a second receiver via only the first antenna; and
transmitting the first and second data using a plurality of modulation layers of a carrier radio frequency signal, wherein each modulation layer of the plurality of modulation layers is a hierarchical modulation layer of the carrier radio frequency signal, and wherein said transmitting comprises transmitting the first data to the first receiver using a first modulation layer of the plurality of modulation layers and transmitting the second data to the second receiver using a second modulation layer of the plurality of modulation layers.
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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 method for transmitting information to at least one user element from at least one communication interface comprising:
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receiving first data intended for transmission to a first receiver via first and second antennas of the at least one communication interface and second data intended for transmission to a second receiver via only the first antenna; and transmitting the first and second data using a plurality of modulation layers of a carrier radio frequency signal, wherein each modulation layer of the plurality of modulation layers is a hierarchical modulation layer of the carrier radio frequency signal, and wherein said transmitting comprises transmitting the first data to the first receiver using a first modulation layer of the plurality of modulation layers and transmitting the second data to the second receiver using a second modulation layer of the plurality of modulation layers. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A system for transmitting information at a network element, the system comprising:
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transmission circuitry for performing wireless transmission comprising a first antenna and a second antenna; and processing hardware coupled to the transmission circuitry, wherein the processing hardware is configured to; receive first data intended for transmission to a first receiver and second data intended for transmission to a second receiver; and transmit the first and second data using a plurality of modulation layers of a carrier radio frequency signal via the transmission circuitry, wherein each modulation layer of the plurality of modulation layers is a hierarchical modulation layer of the carrier radio frequency signal, and wherein said transmitting comprises; transmitting the first data to the first receiver using a first modulation layer of the plurality of modulation layers using the first and second antennas; and transmitting the second data to the second receiver using a second modulation layer of the plurality of modulation layers using only the first antenna. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18, 19, 20)
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Specification