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:
May. 25, 2021
Filed:
May. 24, 2016
Telefonaktiebolaget Lm Ericsson (Publ), Stockholm, SE;
TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm, SE;
Abstract
A method () of determining sign of a calibration compensation for use in an antenna system () is provided, the antenna system () comprising individually calibrated subarrays (). The method () comprises selecting () a set of antenna elements comprising two neighboring antenna elements of the first subarray () and two neighboring antenna elements of the second subarray (); measuring (): in a selected antenna element of the first subarray () a first received signal Yas transmitted from the other selected antenna element of the first subarray () and a second received signal Yas transmitted from the neighboring antenna element of the second subarray (), and in a selected antenna element of the second subarray () a third received signal Yas transmitted from the other selected antenna element of the second subarray () and a fourth received signal Yas transmitted from the neighboring antenna element of the first subarray (); calculating () for the first calibrated subarray () a downlink compensation value Δtand an uplink compensation value Arbased on measurement values obtained from the measuring (), each compensation value At, Arhaving a positive and a negative solution; determining () a first compensation value estimate, k, for downlink compensation and a second compensation value estimate, k, for uplink compensation; and determining () the sign of the downlink compensation value Atand the uplink compensation value Arbased on distance between the first compensation value estimate kand the downlink compensation value, At, and the distance between the second compensation value estimate, k, and the uplink compensation value Ar.