Patent ID: 11899096
Assignee: DENSO CORPORATION
Field: Measurement (Instruments)
Classification: CPC G  H  B  E | IPC B  G  H

Claim 11:
12. A computer readable non-transitory tangible medium storing a control program product, the control program product comprising instructions for controlling a computer to be implemented as a transmission control device,
wherein
the transmission control device is mounted on a vehicle and drives a plurality of antennas to detect a position of the portable device relative to the vehicle using a wireless communication between the portable device and the plurality of antennas,
the plurality of antennas are arranged at respective positions of the vehicle and have different transmission ranges from one another, and the portable device is carried by a user, and
the control program product further comprises instructions that control the transmission control device to function as a processor and memory configured to:
control a genuine transmission antenna to transmit, with use of a carrier wave, a genuine code that activates the portable device, and the genuine transmission antenna being one of the plurality of antennas; and
control an inversion transmission antenna to transmit, with use of a carrier wave, an inversion code including at least partial inverted genuine code concurrently with a transmission of the genuine code from the genuine transmission antenna, and the inversion transmission antenna being one of the plurality of antennas and having a transmission range that does not overlap with a transmission range of the genuine transmission antenna.