| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a receiving apparatus in a communication method using spreading codes, which quickly determines a communication frequency to transmit desired communication information by efficiently searching a communication frequency fc from a frequency range that is expected to include the communication frequency to transmit the desired communication information, and acquires characteristics enough for power consumption reduction. <P>SOLUTION: If the strength of a signal received by an RF signal receiver 110 is higher than a specified criteria Pn, a communication part 152 determines the communication frequency fc using a first communication frequency that is a candidate limited by a frequency selection part 151 based on the situation of correlation peak detection in a synchronization part 141 of a signal processor 140. On the other hand, if the received signal strength is equal to or lower than the specified criteria Pn, the communication frequency fc is determined based on correlation peak detection not depending on the frequency selection part 151. <P>COPYRIGHT: (C)2008,JPO&INPIT |
