| 摘要 |
<p>The wireless device selects one from plural frequency channels prepared. The wireless device receives an electric wave via the frequency channel selected. When receiving the electric wave, the wireless device demodulates the electric wave to obtain a bit sequence. The wireless device checks whether the bit sequence obtained has a predetermined bit pattern. When the bit sequence has the predetermined bit pattern, the wireless device concludes that the received electric wave is identical to an intended wireless signal including predetermined information. When the bit sequence does not have the predetermined bit pattern, the wireless device concludes that the received electric wave is not identical to the intended wireless signal. When concluding that the received electric wave is identical to the intended wireless signal, the wireless device decodes the bit sequence to acquire the predetermined information. When concluding that the received electric wave is not identical to the intended wireless signal, the wireless device selects from the plural frequency channels a frequency channel different from the previously selected frequency channel.</p> |
