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1. (WO2018145737) POLARIZATION HANDLING OF BEAM-FORMED SIGNALS

Pub. No.:    WO/2018/145737    International Application No.:    PCT/EP2017/052712
Publication Date: Fri Aug 17 01:59:59 CEST 2018 International Filing Date: Thu Feb 09 00:59:59 CET 2017
IPC: H04B 7/06
H04B 7/10
Applicants: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Inventors: NILSSON, Andreas
Title: POLARIZATION HANDLING OF BEAM-FORMED SIGNALS
Abstract:
There is provided mechanisms for polarization handling of received beam- formed signals. A method is performed by a receiving radio transceiver device. The method comprises collecting statistics of received power of a beam-formed signal transmitted in two orthogonal polarizations from a transmitting radio transceiver device. The method comprises determining a similarity measure value of the beam-formed signal between the two orthogonal polarizations using the collected statistics. The method comprises signalling to the transmitting radio transceiver device, when the similarity measure value is equal to, or larger than, a similarity threshold value, to use rank one for subsequent transmission of the beam-formed signal to the receiving radio transceiver device.