Uplink training for MIMO implicit beamforming
AssigneeMarvell World Trade Ltd.
InventorsRohit U. Nabar, Hongyuan Zhang, Sudhir Srinivasa, Xiayu Zheng
Life of this patent
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Abstract
In a method for beamforming in a multiple input multiple output (MIMO) communication system, a data unit is received from a communication device via a MIMO communication channel, and it is determined whether the data unit satisfies one or more selection criteria. Further, when it is determined that the data unit satisfies the one or more selection criteria, the data unit is selected to be used in developing a steering matrix for transmitting data units to the communication device.
Claims17
A method for beamforming in a multiple input multiple output (MIMO) communication system, the method comprising:
- receiving, by a first communication device, a data unit from a second communication device via a reverse MIMO communication channel;
- determining, by the first communication device, whether the data unit satisfies one or more implicit beamforming selection criteria;
- when it is determined that the data unit satisfies the one or more implicit beamforming selection criteria, selecting, by the first communication device, the data unit to be used in developing a steering matrix for transmitting data units from the first communication device to the second communication device via a forward MIMO communication channel;
- and
- developing, at the first communication device, the steering matrix for transmitting data units from the first communication device to the second communication device, wherein developing the steering matrix includes using channel estimate information determined from the selected data unit.
A first communication device for use in a multiple input multiple output (MIMO) communication system, the apparatus comprising:
- a network interface device having one or more integrated circuit devices configured to
- receive a data unit from a second communication device via a reverse MIMO communication channel,
- determine whether the data unit satisfies one or more implicit beamforming selection criteria,
- when it is determined that the data unit satisfies the one or more implicit beamforming selection criteria, select the data unit to be used in developing a steering matrix for transmitting data units from the first communication device to the second communication device via a forward MIMO communication channel, and
- develop the steering matrix for transmitting data units from the first communication device to the second communication device, including using channel estimate information determined from the selected data unit.
Dependencies are inferred from the claim text.