US 12,254,722 B2
Operating a communication device of a motor vehicle
Amir Cenanovic, Hepberg (DE); and Lars Reichardt, Wettstetten (DE)
Assigned to Audi AG, Ingolstadt (DE)
Appl. No. 18/004,011
Filed by AUDI AG, Ingolstadt (DE)
PCT Filed May 18, 2021, PCT No. PCT/EP2021/063062
§ 371(c)(1), (2) Date Dec. 30, 2022,
PCT Pub. No. WO2022/002476, PCT Pub. Date Jan. 6, 2022.
Claims priority of application No. 10 2020 117 335.0 (DE), filed on Jul. 1, 2020.
Prior Publication US 2023/0260333 A1, Aug. 17, 2023
Int. Cl. H04B 17/20 (2015.01); G07C 5/00 (2006.01)
CPC G07C 5/008 (2013.01) [H04B 17/202 (2023.05)] 6 Claims
OG exemplary drawing
 
1. A method for operating a communication device of a motor vehicle, the method comprising:
communicating, by the communication device, with at least one other motor vehicle and at least one stationary receiver, using a wireless communication connection based on linearly polarized electromagnetic waves;
transmitting, by the communication device, a transmission signal with a preset transmission power for using the wireless communication connection;
reducing the preset transmission power depending on a reception of a reception signal by the communication device, wherein the communication device uses electromagnetic waves at least partially orthogonally polarized with respect to the linearly polarized electromagnetic waves and, wherein the linearly polarized electromagnetic waves are vertically polarized electromagnetic waves and the electromagnetic waves orthogonally polarized hereto are at least partially horizontally polarized electromagnetic waves;
capturing and evaluating of reception signal parts of the reception signal to ascertain if the reception signal uses circularly polarized electromagnetic waves, the reception signal parts including a horizontal reception power of a horizontal reception signal part of the reception signal and a vertical reception power of a vertical reception signal part of the reception signal;
adjusting a phase of the horizontal reception signal part to compensate for propagation time differences, wherein the time differences occur due to the capture and/or the evaluation of the reception signal parts by the communication device; and
reducing the preset transmission power when a reception power of the reception signal is greater than a preset comparative value.