Explicit channel information feedback based on high-order PCA decomposition or PCA composition

US11876589B2 · kind B2 · utility

Assignee

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

Inventors

• Venkatesh Ramireddy · Erlangen, DE
• Markus Landmann · Erlangen, DE
• Marcus Grossmann · Erlangen, DE
• Florian Römer · Neuhaus, DE

Key dates

• Filing date: Nov 17, 2020
• Grant date: Jan 16, 2024
• Expiry date: May 16, 2042

Classification

• Technology area (CPC H): Electricity
• CPC primary: H04L25/0248
• WIPO field: Telecommunications
• WIPO sector: Electrical engineering

Abstract

A communication device for providing an explicit channel state information, CSI, feedback in a wireless communication system includes a transceiver to receive, from a transmitter a radio signal via a radio time-variant frequency MIMO channel, the radio signal including downlink reference signals according to a reference signal configuration, and downlink signals including the reference signal configuration, and a processor. The processor estimates the CSI using measurements on the downlink reference signals of the radio channel according to the reference signal configuration over one or more time instants/slots, constructs a frequency-domain channel tensor using the CSI estimate, performs a higher-order principal component analysis, HO-PCA, on the channel tensor, identifies a plurality of dominant principal components of the channel tensor, thereby obtaining a compressed channel tensor, and reports to the transmitter the explicit CSI including the dominant principal components of the channel tensor.