| 摘要 |
PURPOSE: A one-to-one wireless transmission method using a frequency adaption technique in an FM(Frequency Modulation) radio broadcasting frequency and a device thereof are provided to improve usage of limited frequency resource by reusing a frequency incapable of listening FM radio broadcasting. CONSTITUTION: A transmitter(302) modulates a digital signal into an FSK(Frequency Shift Keying) signal and transmits the FSK signal. A receiver(311) demodulates the FSK signal. A controller(306) sets the minimum value as a noise level by measuring an RSSI(Received Electric Field Intensity) of an FM signal. If the RSSI is smaller than a reference RSSI, the controller determines a frequency having the RSSI as a wireless transceiving frequency. |
