Communication system, tuner, and setting method

  • US 9,882,597 B2
  • Filed: 03/10/2014
  • Issued: 01/30/2018
  • Est. Priority Date: 03/11/2013
  • Status: Active Grant
First Claim
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1. A communication system comprising:

  • a mobile device including;

    a signal generating unit configured to generate a first signal,a low frequency (LF) transponder response unit configured to modulate the first signal into LF-band radio waves and wirelessly transmit the first signal generated by the signal generating unit, the first signal including frequency information that is used in wireless communication between the mobile device and a tuner;

    a radio frequency (RF) transmitting unit configured to modulate a response signal into RF-band radio waves and wirelessly transmit the response signal;

    the tuner including a setting processing unit configured to set a receiving frequency of an antenna and a demodulation frequency of a phase synchronization circuit, the setting processing unit being configured to set the receiving frequency and the demodulation frequency on the basis of the frequency information included in the first signal from the mobile device;

    a setting information acquisition unit configured to acquire setting information corresponding to the frequency information, the frequency information being included in the first signal received by an engine switch, whereinthe setting processing unit is configured to set the receiving frequency of the antenna on the basis of the setting information acquired by the setting information acquisition unit;

    the engine switch is configured to carry out bidirectional communication with the LF-band radio waves; and

    the LF transponder response unit is configured to carry out bidirectional communication with the engine switch when the mobile device is initially cataloged in an in-vehicle electronic device, and the first signal is transmitted from the mobile device to the in-vehicle electronic device when the mobile device is initially cataloged in the in-vehicle electronic device.

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