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:
Mar. 29, 2022
Filed:
Nov. 20, 2017
Telefonaktiebolaget Lm Ericsson (Publ), Stockholm, SE;
Elmar Trojer, Täby, SE;
Miguel Berg, Sollentuna, SE;
Yezi Huang, Täby, SE;
Chenguang Lu, Sollentuna, SE;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
A method performed by a RRU of a distributed base station system, which further comprising a BBU, connected to the RRU. The RRU is arranged to wirelessly communicate with at least one UE. The method comprises determining a downlink channel estimate from received uplink signals and determining a first part of precoding coefficients to be used for precoding signals to be sent downlink to the at least one UE based on the determined downlink channel estimate. The method further comprises receiving a second part of the precoding coefficients from the BBU, precoding downlink signals of data received from the BBU using the first and the second part of the precoding coefficients and sending the precoded downlink signals to the at least one UE via the plurality of antennas.