Title:
PORT SELECTION FOR CHANNEL STATE FEEDBACK WITH ANALOG FEEDFORWARD
Document Type and Number:
WIPO Patent Application WO/2021/068915
Kind Code:
A1
Abstract:
Certain aspects of the present disclosure provide techniques for port selection for channel state feedback with analog feedforward. A method that may be performed by a user equipment (UE) includes selecting one or more channel state information reference signals (CSI-RS) ports, of a plurality of CSI-RS ports, for the UE to report CSI. The port selection includes selecting any of the plurality of CSI-RS ports for selecting CSI-RS based on a grouping of the plurality of CSI-RS ports. The UE determines a precoding matrix indicator (PMI) formed by a linear combination of the one or more selected CSI-RS ports. The UE computes at least wideband linear combination coefficients for the selected CSI-RS ports. The UE provides the selected one or more CSI-RS ports and the computed wideband linear combination coefficients to a base station (BS) in a CSI report.
Inventors:
HAO CHENXI (US)
WU LIANGMING (US)
ZHANG YU (US)
WEI CHAO (US)
XU HAO (US)
CHEN WANSHI (US)
WU LIANGMING (US)
ZHANG YU (US)
WEI CHAO (US)
XU HAO (US)
CHEN WANSHI (US)
Application Number:
PCT/CN2020/120104
Publication Date:
April 15, 2021
Filing Date:
October 10, 2020
Export Citation:
Assignee:
QUALCOMM INC (US)
HAO CHENXI (CN)
WU LIANGMING (CN)
ZHANG YU (CN)
WEI CHAO (CN)
XU HAO (CN)
CHEN WANSHI (US)
HAO CHENXI (CN)
WU LIANGMING (CN)
ZHANG YU (CN)
WEI CHAO (CN)
XU HAO (CN)
CHEN WANSHI (US)
International Classes:
H04W72/04
Foreign References:
| CN108271265A | 2018-07-10 | |||
| CN109302857A | 2019-02-01 | |||
| US20190190578A1 | 2019-06-20 | |||
| US20160119097A1 | 2016-04-28 |
Other References:
QUALCOMM INCORPORATED: "CSI Enhancement for MU-MIMO Support", 3GPP DRAFT; R1-1813441 CSI ENHANCEMENT FOR MU-MIMO SUPPORT, 3RD GENERATION PARTNERSHIP PROJECT (3GPP), MOBILE COMPETENCE CENTRE ; 650, ROUTE DES LUCIOLES ; F-06921 SOPHIA-ANTIPOLIS CEDEX ; FRANCE, vol. RAN WG1, no. Spokane, U.S.A.; 20181112 - 20181116, 11 November 2018 (2018-11-11), Mobile Competence Centre ; 650, route des Lucioles ; F-06921 Sophia-Antipolis Cedex ; France, XP051555480
Attorney, Agent or Firm:
NTD PATENT & TRADEMARK AGENCY LTD. (CN)
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