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

Claim 15:
16. An occupant detection system for an interior cabin area of a vehicle, the occupant detection system comprising:
one or more signal conversion devices including conversion circuitry, wherein the conversion circuitry of each of the one or more signal conversion devices include a combined low-noise amplifier with bandpass filter, a mixer and a local oscillator, and a second bandpass filter; and
a wireless control module including a multi-band transceiver having two or more transceivers, wherein the wireless control module executes instructions to:
continuously send, by a first transceiver, signals on a first frequency band, wherein the signals include packets containing original training symbols;
receive, by a second transceiver, signals on a second frequency band from a signal conversion device, wherein conversion circuitry of the signal conversion device converts the signals on the first frequency band into the signals on the second frequency band;
compare 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
determine one or more occupants are present within the interior cabin area of the vehicle based on the change in one or more CSI parameters.