The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Jul. 15, 2025
Filed:
Dec. 14, 2020
Telefonaktiebolaget Lm Ericsson (Publ), Stockholm, SE;
Zhao Wang, Täby, SE;
Xueying Hou, Lund, SE;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
A method performed by a network node for creating a precoder for forming a Downlink, DL, beam between the network node and a User Equipment, UE, which DL beam is for reciprocity-based Multiple Input Multiple Output, MIMO, communication in a wireless communications network is provided. The network node obtains matched filter channel estimates for an Uplink, UL, signal, based on a reference signal from the UE known by the network node. The network node obtains a hypothesis testing space within a first precoder codebook, of one polarization, based on the matched filter channel estimates. The network node selects a set of precoder candidates out of the first precoder codebook in accordance with the hypotheses testing space. The network node creates the precoder for forming the DL beam between the network node and the UE, based on calculating a linear combination of the precoder candidates in the set of precoder candidates.