Antenna systems and methods for massive MIMO communication
AssigneeAvago Technologies General IP (Singapore) Pte. Ltd.
InventorsLouay Jalloul, Sam Alex, Amin Mobasher
Life of this patent
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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.
Claims20
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.
A method comprising:
- 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.
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 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.
Dependencies are inferred from the claim text.