CSI reporting and codebook structure for doppler-delay codebook-based precoding in a wireless communications system

US11595089B2 · kind B2 · utility

Assignee

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

Inventors

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

Key dates

• Filing date: Sep 7, 2021
• Grant date: Feb 28, 2023
• Expiry date: Sep 7, 2041

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04B7/10
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A communication device for providing a channel state information, CSI, feedback in a wireless communication system includes a transceiver to receive a radio signal including downlink reference signals. The processor The communication device selects from one or more codebooks a subset of D delay components and/or a subset of F Doppler-frequency components and uses the selected subset of delay components for each polarization and each spatial beam and/or the selected subset of Doppler-frequency components for each polarization, each spatial beam and each delay, when calculating the Doppler-delay precoder matrix.