公开(公告)号：EP2896137A4

公开(公告)日：2016-04-13

申请号：EP12884534

申请日：2012-09-13

Applicant: ERICSSON TELEFON AB L M

Inventor： CHEN JIA ,  SU YOUPING ,  WEI MIN

IPC: H04B7/04

CPC classification number: H04B1/48 ,  H01Q3/267 ,  H04B1/56 ,  H04B7/04 ,  H04B17/12 ,  H04B17/14 ,  H04B17/21

Abstract: Method and apparatus for antenna calibration have been disclosed. A radio unit (510) is provided. The radio unit (510) may comprise: a plurality of transmit/receive (TX/RX) paths; a plurality of radio frequency (RF) ports (512) connected with the plurality of TX/RX paths; and a coupling unit (516), coupled with the plurality of TX/RX paths and configured to inject an uplink (UL) calibration signal (550) into at least one of the plurality of TX/RX paths and extract a downlink (DL) calibration signal (540) 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 (500) comprising such radio unit (510) is also provided.