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:
Sep. 12, 2017
Filed:
Sep. 13, 2012
Jia Chen, Sichuan, CN;
Youping Su, Solna, SE;
Min Wei, Sichuan, CN;
Telefonaktiebolaget LM Ericsson (publ), Stockholm, SE;
Abstract
Method and apparatus for antenna calibration have been disclosed. A radio unit () is provided. The radio unit () may comprise: a plurality of transmit/receive (TX/RX) paths; a plurality of radio frequency (RF) ports () connected with the plurality of TX/RX paths; and a coupling unit (), coupled with the plurality of TX/RX paths and configured to inject an uplink (UL) calibration signal () into at least one of the plurality of TX/RX paths and extract a downlink (DL) calibration signal () from at least one of the plurality of TX/RX paths. A normal TX/RX path may be reused both for antenna calibration and antenna supervision. Thus, a low cost hardware solution for antenna calibration is provided. An AIR base station () comprising such radio unit () is also provided.