- Patent Title: Reference signal for receive beam refinement in cellular systems
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Application No.: US17007688Application Date: 2020-08-31
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Publication No.: US11336348B2Publication Date: 2022-05-17
- Inventor: Wenting Chang , Yushu Zhang , Yuan Zhu , Huaning Niu , Jong-Kae Fwu
- Applicant: Apple Inc.
- Applicant Address: US CA Cupertino
- Assignee: Apple Inc.
- Current Assignee: Apple Inc.
- Current Assignee Address: US CA Cupertino
- Agency: Kowert, Hood, Munyon, Rankin & Goetzel, P.C.
- Main IPC: H04B7/06
- IPC: H04B7/06 ; H04L5/00

Abstract:
User Equipment (UE) and base station (eNB) apparatus and methodology for adjusting receive beamforming. A beam refinement reference signal (BRRS) is transmitted with the same transmit beam direction on which data is to be transmitted. While receiving the BRRS, the receiver varies its receive beam direction and measures a signal characteristic of reception of the BRRS to determine a refined receive beam direction. The refined receive beam direction is used to receive the data.
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