| 摘要 |
PROBLEM TO BE SOLVED: To avoid multipath fading as a method of sequentially changing over reception antennas and to reduce switching of the reception antennas as a whole. SOLUTION: After start-up, antennas A and B are alternately changed over and an antenna resulting from the change-over is defined as a reception antenna. For each of registered transmission nodes, a reception antenna having succeeded in reception of data from the transmission node is stored as an optimal reception antenna. When data from all the registered transmission nodes are successfully received, based on stored optimal reception antennas of transmission devices, a base antenna is determined by majority. After the base antenna is determined, change-over control of the reception antenna is then intercepted and the determined base antenna is fixed as a reception antenna. COPYRIGHT: (C)2011,JPO&INPIT |
