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US 10,771,120 B2Granted
Base station front end preprocessing
AssigneeApple Inc.
InventorsGuangjie Li, Wenting Chang, Yushu Zhang
Life of this patent
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Abstract
Embodiments of the present disclosure describe systems, devices, and methods for preprocessing in a base station of a multiple-input multiple-output (MIMO) wireless system. In embodiments, remote radio unit (RRU) circuitry may control radio communication related to the MIMO wireless system, including applying a user equipment (UE)-specific spatial filter.
Claims22
A base station, comprising:
- remote radio unit (RRU) circuitry to control radio communication related to multiple-input multiple-output (MIMO) operation, including application of a user equipment (UE)-specific spatial filter,
- wherein the RRU circuitry includes a downlink (DL) user equipment (UE)-specific precoder to facilitate DL beamforming by the base station;
- and
- baseband unit (BBU) circuitry coupled with the RRU circuitry to control baseband operation related to the MIMO operation.
1 more element
One or more non-transitory, computer-readable media having instructions stored thereon, wherein the instructions, in response to execution by a device, cause the device to:
- apply downlink (DL) user equipment (UE)-specific precoding in remote radio unit (RRU) circuitry to control radio communication in DL beamforming related to a multiple input, multiple output (MIMO) system having at least twenty antennas;
- and
- apply UE-specific spatial filtering in the RRU circuitry to uplink signals received from a specific UE.
Remote radio unit (RRU) circuitry, comprising:
- a decompression unit to receive and decompress multiple user streams from a baseband unit;
- a downlink (DL) user equipment (UE)-specific precoder to compensate for characteristics of a channel between the RRU and a specific UE;
- and
- an uplink (UL) UE-specific spatial filter for a physical uplink shared channel (PUSCH).
1 more element
Dependencies are inferred from the claim text.