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US 11,632,152 B2Granted
Over-the-air calibration for reciprocity based UL MIMO transmission
AssigneeQUALCOMM Incorporated
InventorsYu Zhang, Chao Wei, Wanshi Chen
Life of this patent
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Abstract
Certain aspects of the present disclosure relate to methods and apparatus for performing one or more over the air calibration procedures for reciprocity based uplink MIMO transmissions, for example, in new radio (NR).
Claims34
A method for performing an over the air calibration for wireless communications by a user equipment (UE), comprising:
- sending a first reference signal (RS) to a device;
- estimating a first channel from the device to the UE based on a second RS received from the device;
- receiving, from the device, a representation of a second channel from the UE to the device determined based on the first RS;
- and
- performing a calibration for a transmission to the device based in part on the first channel estimate and the representation of the second channel.
2 more elements
A method for performing an over the air calibration for wireless communications by a base station (BS), comprising:
- receiving a first reference signal (RS) from a first user equipment (UE);
- estimating an uplink channel from the first UE to the BS based on the first RS;
- determining a representation of the uplink channel based on the uplink channel estimate;
- and
- sending the representation of the uplink channel to the first UE to assist the first UE in calibrating a transmission to the BS.
2 more elements
Dependencies are inferred from the claim text.