	US 12,040,864 B2
	Passive intermodulation aware beamforming
Marko Fleischer, Unterhaching (DE); Jan Hellmann, Munich (DE); Rene Roschke, Mammendorf (DE); and Helmut Heinz, Turkheim (DE)
Assigned to Nokia Solutions and Networks Oy, Espoo (FI)
Appl. No. 17/797,505
Filed by Nokia Solutions and Networks Oy, Espoo (FI)
PCT Filed Feb. 10, 2020, PCT No. PCT/EP2020/053278 § 371(c)(1), (2) Date Aug. 4, 2022, PCT Pub. No. WO2021/160237, PCT Pub. Date Aug. 19, 2021.
Prior Publication US 2023/0081201 A1, Mar. 16, 2023
Int. Cl. H04B 7/06 (2006.01)

CPC H04B 7/0617 (2013.01) [H04B 7/0695 (2013.01)]

18 Claims

1. An apparatus, comprising:

at least one processor; and

at least one non-transitory memory

storing instructions that when executed by the at least one processor, cause the apparatus to:

for each beam direction of a set of beam directions of an antenna array of a communication system, determining a level of a passive intermodulation signal at a receiver of the communication system, the passive intermodulation signal being caused by a set of signals transmitted with the antenna array in the beam direction;

identifying one or more beam directions of the set of beam directions whose determined passive intermodulation level is higher than a predefined threshold; and

adapting a beamforming of signals in at least part of the identified beam directions to mitigate the passive intermodulation level at the receiver,

wherein the signals comprise signalling with a receiving device having a direction that coincides with at least one direction of the identified one or more beam directions, and

wherein the adapting comprises generating one or more beam directions which are closest directions to the direction of the receiving device and which do not coincide with the at least one direction of the identified beam directions.