| 摘要 |
<P>PROBLEM TO BE SOLVED: To prevent a uselessly consumption of a battery by receiving an undesired wave. <P>SOLUTION: If timing to detect synchronous bit pattern Sync by a control unit 1 that is a synchronous bit pattern detection means, agrees with the period, the control unit 1 that is a discrimination means, discriminates that it is a normal radio signal, and if the timing does not agree with the period, the control unit 1 discriminates that it is not a normal radio signal. The control unit 1 that is a control means further stops radio transceiving unit 2 that is a receiving means in a case that it is discriminated not to be a normal radio signal. Therefore, it is possible to discriminate whether the received radio wave is a desired wave or an undesired wave by whether the synchronous bit pattern Sync is included or not, moreover, if it is an undesired wave, it is possible to uselessly consume the battery by immediately stopping the radio transceiving unit 2 that is a receiving means. <P>COPYRIGHT: (C)2009,JPO&INPIT |
