Invention Grant
- Patent Title: Analog CSF for FDD partial reciprocity
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Application No.: US17595560Application Date: 2020-06-09
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Publication No.: US12199902B2Publication Date: 2025-01-14
- Inventor: Bo Chen , Joseph Binamira Soriaga , Pavan Kumar Vitthaladevuni , Yu Zhang , Chenxi Hao , Ruifeng Ma , Krishna Kiran Mukkavilli , 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: Procopio, Cory, Hargreaves & Savitch LLP
- Priority: WOPCT/CN2019/091882 20190619
- International Application: PCT/CN2020/095055 WO 20200609
- International Announcement: WO2020/253573 WO 20201224
- Main IPC: H04L5/00
- IPC: H04L5/00 ; H04B7/0456 ; H04B7/06 ; H04W72/21

Abstract:
A user equipment (UE) receives a first channel state information reference signal (CSI-RS) on a first set of beams and receives a second CSI-RS on a second set of beams. The apparatus determines a channel quality indicator (CQI), a rank indicator (RI), and a precoding matrix indicator (PMI) based on the first CSI-RS. The apparatus reports the CQI and RI using an uplink control channel and indicates the PMI using a precoded SRS transmission. The precoded SRS transmission may be precoded based on a dissimilarity between the first CSI-RS and the second CSI-RS. The first CSI-RS may include a defined precoder, and the second CSI-RS may include a precoder based on an uplink channel estimate of a non-precoded SRS from the UE.
Public/Granted literature
- US20220263620A1 ANALOG CSF FOR FDD PARTIAL RECIPROCITY Public/Granted day:2022-08-18
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