US 12,176,627 B2
Method and system for mast sway compensation
Lars Manholm, Gothenburg (SE); Göran Nilsson, Hisings Backa (SE); and Arne Alping, Kållered (SE)
Assigned to TELEFONAKTIEBOLAGET LM ERICSSON (PUBL), Stockholm (SE)
Appl. No. 17/795,633
Filed by Telefonaktiebolaget LM Ericsson (publ), Stockholm (SE)
PCT Filed Feb. 26, 2020, PCT No. PCT/SE2020/050218
§ 371(c)(1), (2) Date Jul. 27, 2022,
PCT Pub. No. WO2021/173050, PCT Pub. Date Sep. 2, 2021.
Prior Publication US 2023/0075873 A1, Mar. 9, 2023
Int. Cl. H01Q 3/34 (2006.01); H01Q 1/00 (2006.01); H01Q 1/12 (2006.01); H01Q 3/02 (2006.01); H04B 17/21 (2015.01); H04B 17/318 (2015.01)
CPC H01Q 3/34 (2013.01) [H01Q 1/005 (2013.01); H01Q 1/1257 (2013.01); H01Q 3/02 (2013.01); H04B 17/21 (2015.01); H04B 17/318 (2015.01)] 18 Claims
OG exemplary drawing
 
1. A method for compensating a movement of an antenna structure having a directive antenna mounted thereto, the method comprising:
obtaining sensor data from a motion sensor, the sensor data being indicative of the movement of the antenna structure relative to a reference orientation, wherein the motion sensor is associated with a set of calibration parameters such that when applied to the obtained sensor data, calibrated sensor data is formed;
generating a compensation signal at an output for controlling a beam direction of the directive antenna based on the formed calibrated sensor data such that the beam direction is an intended direction of the directive antenna and such that the movement of the antenna structure is compensated for; and
re-calibrating the motion sensor in order to generate a set of calibration coefficients upon the expiry of a predefined time period, upon a counter reaching a counter threshold, or upon a measured antenna parameter or signal parameter diverging from a parameter range, by:
obtaining a received signal strength indication, RSSI, while the beam direction is controlled based on the generated compensation signal;
generating the set of calibration coefficients based on the obtained RSSI; and
updating the set of calibration parameters for the motion sensor with the determined set of calibration coefficients.