Patent ID: 11956046
Assignee: GM GLOBAL TECHNOLOGY OPERATIONS LLC
Field: Telecommunications (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 14:
15. A method for detecting the presence of occupants within an interior cabin area of a vehicle by an occupant detection system, the method comprising:
continuously send, by a first transceiver that is part of a wireless control module, signals on a first frequency band, wherein the signals include packets containing original training symbols;
receiving, by a second transceiver that is part of the wireless control module, signals on a second frequency band from a signal conversion device, wherein the conversion circuitry of the signal conversion device converts the signals on the first frequency band into the signals on the second frequency band;
comparing the original training symbols from the signals on the first frequency band with training symbols from the signals on the second frequency band to determine a change in value of in one or more channel state information (CSI) parameters; and
determining one or more occupants are present within the interior cabin area of the vehicle based on the change in one or more CSI parameters.