A vehicle communication system includes an onboard device that transmits a detection signal from LF transmission antennas provided in a vehicle, and a portable device that receives the detection signals and transmits a response signal that is in accordance with the received detection signals. The onboard device detects the position of the portable device by receiving the response signal transmitted by the portable device. The portable device includes a measuring unit that measures the received signal strengths of the received detection signals, a quantization unit that quantizes the received signal strengths with a corresponding one of different resolutions, and a transmission unit that transmits a response signal that includes the quantized received signal strength data.
VEHICLE COMMUNICATION SYSTEM AND PORTABLE DEVICE
17.01.2019
Patent
Elektronische Ressource
Englisch
IPC: | H04W WIRELESS COMMUNICATION NETWORKS , Drahtlose Kommunikationsnetze / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / G01S RADIO DIRECTION-FINDING , Funkpeilung / H04B TRANSMISSION , Übertragung |
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