US 11,777,573 B2
Method and network node with improved beamforming
Pål Frenger, Linköping (SE); Emil Björnson, Hägersten (SE); and Erik G. Larsson, Linköping (SE)
Assigned to Telefonaktiebolaget LM Ericsson (Publ), Stockholm (SE)
Appl. No. 17/639,678
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Sep. 20, 2019, PCT No. PCT/SE2019/050896
§ 371(c)(1), (2) Date Mar. 2, 2022,
PCT Pub. No. WO2021/054878, PCT Pub. Date Mar. 25, 2021.
Prior Publication US 2022/0294507 A1, Sep. 15, 2022
Int. Cl. H04B 7/06 (2006.01); H01Q 3/40 (2006.01); H04B 7/0495 (2017.01)
CPC H04B 7/0617 (2013.01) [H01Q 3/40 (2013.01); H04B 7/0495 (2013.01)] 20 Claims
OG exemplary drawing
 
14. A network node for configuring an antenna system of the network node, which antenna system comprises at least a first antenna processing unit, APU1, and a second antenna processing unit, APU2, adjacently connectable to each other through a serialised front haul, and each one of the APU1 and APU2 comprising at least two antenna elements, the antenna elements of APU1 being connectable to their respective Radio Frequency, RF, chains via a first beamforming unit, and the antenna elements of APU2 being connectable to their respective RF chains via a second beamforming unit, the network node configured to:
configure the first beamforming unit and the second beamforming unit such that an absolute value of an angular difference between at least one beam direction generated by the first beamforming unit and each beam direction generated by the second beamforming unit exceeds or is equal to a threshold value.