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:
Dec. 19, 2017
Filed:
Aug. 27, 2013
Telefonaktiebolaget Lm Ericsson (Publ), Stockholm, SE;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
A method performed by a network node () for finding a direction to a wireless device () in a wireless communication network is provided. The method comprises the step (S) of the network node transmitting reference signal pairs on at least one pair of correlated antennas. Each reference signal pair has a unique phase difference between the signals in the signal pair, and the unique phase differences of the reference signal pairs are distributed over a given angular interval. The method further comprises the step (S) of the network node receiving from the wireless device, in response to each pair of reference signals, a respective indication of a preferred pre-coding matrix, and the step (S) of the network node determining a direction to the wireless device based on the received indications, information representative of the phase differences of the reference signal pairs, and phase information related to the indicated preferred pre-coding matrices.