| 摘要 |
PROBLEM TO BE SOLVED: To provide an antenna changeover communication system capable of reducing influences of level fluctuation due to multipath fading by properly selecting an antenna ensuring a high signal quality free from heavy load processing with a simple and inexpensive configuration.SOLUTION: When a unique word detector detects any unique word UW1 from plural unique words UW1, a signal processing section detects the quality of the received radio signal. After an antenna control section changes the antenna, the signal processing section also detects the quality of the radio signal received by the switched antenna. An antenna control section selects an antenna with a high signal quality detected by the signal processing section and receives the payload after that. A piece of information on the quality of the radio signal detected by the signal processing section is stored in a memory for use to select an antenna for transmitting radio signal. |
