Transmission control device
AssigneeDenso Corporation
InventorKenji Kato
Life of this patent
Estimating the term…
Abstract
A transmission control device is used in an authentication system. The authentication system enables control of an authentication target based on authentication established by verification via wireless communication between the authentication target and a portable device carried by a user. The transmission control device outputs a drive current to a transmission antenna to cause the transmission antenna to transmit a signal having a predetermined frequency band. The transmission control device adjusts the output drive current. The transmission control device detects a current flowing through the transmission antenna.
Claims7
A transmission control device used in an authentication system that enables control of an authentication target based on authentication established by verification via wireless communication between the authentication target and a portable device carried by a user, the transmission control device comprising:
- an antenna drive unit configured to output a drive current to a transmission antenna to cause the transmission antenna to transmit a signal having a predetermined frequency band;
- a current adjustment unit configured to adjust the drive current output by the antenna drive unit;
- a monitor unit configured to detect a current flowing through the transmission antenna;
- and
- a correction value determination unit configured to determine a correction value of the drive current by feedback control based on the current detected by the monitor unit, wherein
- after the correction value determination unit determines the correction value, the current adjustment unit corrects the drive current for transmitting, as the signal, a request signal used for the verification based on the correction value,
- the correction value determination unit determines the correct value of the drive current for transmitting a test signal output from the antenna drive unit as a trial by the feedback control based on the current detected by the monitor unit, and
- the test signal is different from the request signal.
A transmission control device used in an authentication system that enables control of an authentication target based on authentication established by verification via wireless communication between the authentication target and a portable device carried by a user, the transmission control device comprising:
- an antenna driver configured to output a drive current to a transmission antenna to cause the transmission antenna to transmit a signal having a predetermined frequency band;
- a monitor configured to detect a current flowing through the transmission antenna;
- and
- a processor configured to
- adjust the drive current output by the antenna driver, and
- determine a correction value of the drive current output from the antenna driver by feedback control based on the current detected by the monitor, wherein
- after the processor determines the correction value, the processor corrects the drive current for transmitting, as the signal, a request signal used for the verification based on the correction value,
- the processor determines the correction value of the drive current for transmitting a test signal output from the antenna driver as a trial by the feedback control based on the current detected by the monitor, and
- the test signal is different from the request signal.
Dependencies are inferred from the claim text.