| 摘要 |
<P>PROBLEM TO BE SOLVED: To solve the problem that a hit of transmission data may frequently occur during a process for switching a modulation scheme according to a current radio transmission method used for a radio transmission apparatus. <P>SOLUTION: A radio transmission method includes using two pulse streams having repetition frequencies being different from each other to synchronize reception signals received in an active system and a reserve system and selectively switching the active system and the reserve system, wherein the reception signals of the active system and the reserve system received via a radio transmission line are subjected to individual synchronization processing using the first pulse stream, the reception signals of the active system and the reserve system subjected to the synchronization processing using the first pulse stream are subjected to individual synchronization processing using the second pulse stream of which the repetition frequency is less than that of the first pulse stream, and the active system and the reserve system subjected to the synchronization processing are switched based on the second pulse stream. <P>COPYRIGHT: (C)2009,JPO&INPIT |
