Three-component codebook based CSI reporting

US11881919B2 · kind B2 · utility

Assignee

• Fraunhofer-Gesellschaft zur förderung der angewandten Forschung e.V. · DE

Inventors

• Marcus Grossmann · Erlangen, DE
• Markus Landmann · Erlangen, DE
• Ramireddy Venkatesh · Erlangen, DE

Key dates

• Filing date: Aug 11, 2020
• Grant date: Jan 23, 2024
• Expiry date: Sep 12, 2040

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04W72/23
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A method performed by a UE for providing CSI feedback in the form of CSI reports in a wireless communication system includes receiving, from a gNB, higher layer configurations of one or more downlink reference signals, and CSI report configurations associated with the downlink reference signal configurations, and a radio signal including the downlink reference signals according to the one or more downlink reference signal configurations, the downlink reference signals provided over a configured number of frequency domain resources, time domain resources and one or more ports; determining, for each CSI report, a precoding matrix based on the downlink reference signals and two codebooks, and one or more non-zero combining coefficients for complex combining of one or more spatial domain and delay domain basis vectors; and reporting to the network node the CSI reports for the CSI report configurations.