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1. (WO2018009106) METHOD AND ARRANGEMENT FOR ANTENNA CALIBRATION

Pub. No.:    WO/2018/009106    International Application No.:    PCT/SE2016/050691
Publication Date: Fri Jan 12 00:59:59 CET 2018 International Filing Date: Thu Jul 07 01:59:59 CEST 2016
IPC: H04B 17/14
Applicants: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Inventors: BRAUN, Christian
BJÖRK, Vimar
KARLSSON, Jonas B.
Title: METHOD AND ARRANGEMENT FOR ANTENNA CALIBRATION
Abstract:
In a method for calibrating at least two cross coupled antenna element groups in an antenna array, calibrating (S1) the antenna elements within each group of antenna elements. Further, in a respective calibration transceiver in each group, measuring (S2) a coupled signal within each group and a cross-coupled signal originating in another of the at least two groups. In addition, determining (S3) a respective relative phase and amplitude difference between said at least two groups based on the measured coupled signal and said cross-coupled signal, and determining (S4) the true phase and amplitude difference between the at least two groups based on the determined respective relative phase and amplitude differences. Finally, calibrating (S5) the at least two antenna groups based on the determined true phase and amplitude difference.