Invention Grant
- Patent Title: Codebook design with differential phase feedback in frequency domain
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Application No.: US17427585Application Date: 2020-01-31
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Publication No.: US11563472B2Publication Date: 2023-01-24
- Inventor: Bo Chen , Yuwei Ren , Renqiu Wang , Ruifeng Ma , Pavan Kumar Vitthaladevuni , Joseph Binamira Soriaga , Tingfang Ji , Hao Xu
- Applicant: Qualcomm Incorporated
- Applicant Address: US CA San Diego
- Assignee: Qualcomm Incorporated
- Current Assignee: Qualcomm Incorporated
- Current Assignee Address: US CA San Diego
- Agency: Holland & Hart LLP/Qualcomm Incorporated
- Priority: CNPCT/CN2019/074170 20190131
- International Application: PCT/CN2020/074099 WO 20200131
- International Announcement: WO2020/156510 WO 20200806
- Main IPC: H04B7/0456
- IPC: H04B7/0456 ; H04B7/06 ; H04W72/04

Abstract:
Methods, systems, and devices for wireless communications are described. In some systems, a user equipment (UE) may transmit feedback to a base station indicating phase values for sub-bands in a bandwidth part (BWP). The base station may use the phase feedback to perform precoding on a set of beams. To support a reduced payload overhead for the feedback, the UE may implement differential phase feedback. For example, the UE may divide the BWP into a number of sub-band groups and may generate, for each sub-band group of each beam, a first set of bits indicating an absolute phase value for a first sub-band of the sub-band group. The UE may additionally generate a second set of bits indicating differential phase values for the other sub-bands of each sub-band group. The UE may report the first and second sets of bits for the beams to the base station for precoding.
Public/Granted literature
- US20220123801A1 CODEBOOK DESIGN WITH DIFFERENTIAL PHASE FEEDBACK IN FREQUENCY DOMAIN Public/Granted day:2022-04-21
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