| 摘要 |
<p>PROBLEM TO BE SOLVED: To receive wide band signals including multi channels without the need of diversity circuits for the number of the channels by selecting a route where the wide band signals including multi channels are not superimposed by multi-path. SOLUTION: In order to select an optimum reception antenna, the plural reference signals of a frequency different from that of super wide band signals 206 and the same signal strength are simultaneously transmitted from a transmission antenna 201. When the ones of the low strength are included in the signal strength of a part of the reference signals 207 received by a reception antenna 202, the substantial decline of the strength occurs in a part of signals for reception signals 208. Thus, in the case of receiving them by the reception antenna 202, the ones with more than fixed difference in the plural reference signals 207 are excluded as the signals including the multi-path. Also, in the case that the strength of the received reference signals are the same (reference signals 209 and 211), the reception antenna is selected in the descending order of the strength of the reference signals.</p> |
