| 摘要 |
<p>An available frequency range previously assigned to the communication system is divided into a plurality of subranges (SB) each including a plurality of frequency channels to which channel identifiers (ID1-ID4) are assigned, respectively. The channel identifiers are repeatedly assigned to all the frequency channels (CH0-CHm) in the subranges. In such a channel assignment, a transmitting side transmits a signal including a desired channel identifier corresponding to a desired frequency channel. At a receiving side, after detecting a frequency acquisition of the demodulator, the desired channel identifier is detected based on the received signal when the frequency acquisition of the demodulator is detected. When the frequency acquisition of the demodulator is detected and the desired channel identifier is detected, a local oscillation frequency sweeping for demodulator is locked to receive the signal from the transmitting side. <IMAGE></p> |
