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1. (WO2018067050) SPATIAL MULTIPLEXING TRANSMISSION

Pub. No.:    WO/2018/067050    International Application No.:    PCT/SE2016/050970
Publication Date: Fri Apr 13 01:59:59 CEST 2018 International Filing Date: Sat Oct 08 01:59:59 CEST 2016
IPC: H04B 7/024
Applicants: TELEFONAKTIEBOLAGET LM ERICSSON (PUBL)
Inventors: SIMONSSON, Arne
HALVARSSON, Björn
ZHANG, Qiang
ÖKVIST, Peter
Title: SPATIAL MULTIPLEXING TRANSMISSION
Abstract:
There is provided mechanisms for spatial multiplexing transmission from spatially separated transmission points in a network where transmit antennas are distributed between antenna branches on at least two of the spatially separated transmission points. A method is performed by a network node. The method comprises determining channel conditions based on measurements of received signal strength per antenna branch for an uplink signal received from a wireless device. The method comprises estimating channel rank for each of at least two sub-sets of the transmission points based on the channel conditions. The method comprises initiating the spatial multiplexing transmission to the wireless device from the sub-set of transmission points having highest channel rank