Antenna systems and methods for massive MIMO communication
First Claim
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1. A Multi-Input-Multi-Output (MIMO) antenna system, comprising:
- a circuit implementation of, or a programmed processor implementation of, a first M-input M-output hybrid matrix configured to receive a plurality of input signals and generate a respective plurality of hybrid signals, wherein each of the plurality of hybrid signals is a combination of the plurality of input signals, and wherein M is equal to the number of the plurality of input signals;
a circuit implementation of a plurality of power amplifiers (PAs) each configured to receive a respective one of the plurality of hybrid signals and to generate a respective one of a plurality of amplified hybrid signals;
a circuit implementation of a second M-input M-output hybrid matrix configured to receive the plurality of amplified hybrid signals and to generate a plurality of output signals, wherein each of the plurality of output signals includes a component from each of the plurality of input signals with equal weight; and
a plurality of first antennas for transmitting the plurality of output signals to a plurality of second antennas.
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Abstract
Antenna systems and methods for Massive Multi-Input-Multi-Output (MIMO) (M-MIMO) communication are provided. Antennas systems include a M-MIMO transmitter architecture with a hybrid matrix structure. The hybrid matrix structure protects against transmit path component failures and ensures that a spatial rate of the M-MIMO transmitter is not degraded by the failures. Antenna systems and methods also include antenna selection schemes for selecting a subset of antennas from a plurality of antennas to transmit to a receiver.
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Citations
20 Claims
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1. A Multi-Input-Multi-Output (MIMO) antenna system, comprising:
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a circuit implementation of, or a programmed processor implementation of, a first M-input M-output hybrid matrix configured to receive a plurality of input signals and generate a respective plurality of hybrid signals, wherein each of the plurality of hybrid signals is a combination of the plurality of input signals, and wherein M is equal to the number of the plurality of input signals; a circuit implementation of a plurality of power amplifiers (PAs) each configured to receive a respective one of the plurality of hybrid signals and to generate a respective one of a plurality of amplified hybrid signals; a circuit implementation of a second M-input M-output hybrid matrix configured to receive the plurality of amplified hybrid signals and to generate a plurality of output signals, wherein each of the plurality of output signals includes a component from each of the plurality of input signals with equal weight; and a plurality of first antennas for transmitting the plurality of output signals to a plurality of second antennas. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method comprising:
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receiving a plurality of input signals; generating a respective plurality of hybrid signals, wherein each of the plurality of hybrid signals is a combination of the plurality of input signals; generating a respective one of a plurality of amplified hybrid signals based on a respective one of the plurality of hybrid signals; generating a plurality of output signals, wherein each of the plurality of output signals is a combination of the plurality of amplified hybrid signals; transmitting the plurality of output signals from a plurality of first antennas to a plurality of second antennas; estimating a channel from the plurality of first antennas to the plurality of second antennas; and selecting a subset of the plurality of first antennas, based on the estimated channel, for transmitting the plurality of output signals to the plurality of second antennas. - View Dependent Claims (9, 10, 11, 12, 13)
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14. A Multi-Input-Multi-Output (MIMO) antenna system, comprising:
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a circuit implementation of, or a programmed processor implementation of, a first M-input M-output hybrid matrix configured to receive a plurality of input signals and to generate a respective plurality of hybrid signals, wherein each of the plurality of hybrid signals is a combination of the plurality of input signals, and wherein M is equal to the number of the plurality of input signals; a circuit implementation of a plurality of power amplifiers (PAs) each configured to receive a respective one of the plurality of hybrid signals and to generate a respective one of a plurality of amplified hybrid signals; a circuit implementation of a second M-input M-output hybrid matrix configured to receive the plurality of amplified hybrid signals and to generate a plurality of output signals, wherein each of the plurality of output signals is a combination of the plurality of amplified hybrid signals; and a plurality of first antennas for transmitting the plurality of output signals to a plurality of second antennas, wherein the plurality of first antennas are located at a base station, and the plurality of second antennas are located at a user equipment (UE), wherein the first hybrid matrix and the second hybrid matrix have inverse transfer functions. - View Dependent Claims (15, 16, 17, 18, 19, 20)
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Specification