A jamming detection system 100 for a vehicle 105 comprises an antenna configured to receive a radio frequency (RF) wave defining a series of RF pulse and quiet phase durations, and a processor 110 programmed to lock the vehicle in response to one but not both of the durations exceeding a predetermined threshold, and to arm an alarm of the vehicle in response to both of the durations exceeding respective predetermined thresholds. The predetermined thresholds may be respectively proportional to the pulse duration and quiet phase duration. A method to achieve the aim of the jamming detection system 100 is also provided. In another embodiment duty cycle and cycle time of a received RF wave are compared to respective thresholds. The processor may also be programmed to adjust at least one of the predetermined thresholds in response to a location of the vehicle falling within a predetermined region. At least one predetermined threshold may be adjusted by reducing the threshold in response to the predetermined region having a jamming occurrence level exceeding a threshold value.
RF jamming mitigation system and method
2017-09-06
Patent
Electronic Resource
English
IPC: | H04K SECRET COMMUNICATION , Geheimer Nachrichtenverkehr / B60R Fahrzeuge, Fahrzeugausstattung oder Fahrzeugteile, soweit nicht anderweitig vorgesehen , VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR / G07C TIME OR ATTENDANCE REGISTERS , Zeit- oder Anwesenheitskontrollgeräte / H04W WIRELESS COMMUNICATION NETWORKS , Drahtlose Kommunikationsnetze |
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