| 摘要 |
<p>PROBLEM TO BE SOLVED: To reduce an interference or disturbance, which is caused by the great power transmitting signal of a high-speed transmitting mobile station, to other mobile stations including a low-speed transmitting mobile station even when the total number of high-speed and low-speed transmitting mobile stations becomes equal to or more than the number of antenna elements. SOLUTION: Arriving direction estimating parts 7-1 to 7-J are provided for estimating the arriving directions of radio waves respectively from plural high-speed transmitting mobile stations. Outgoing line narrow beam directivity forming parts 8-1 to 8-J for high-speed transmitting station are provided for forming the transmitting antenna directivity of a narrow beam equal with or narrower than the narrowest beam width of all directivities having a null point, where a beam direction is turned to each of the respective directions of these plural high-speed transmitting mobile stations and the beam width thereof can be formed by an array antenna 1 composed of plural antenna elements 1e1-1eM. Outgoing line null type directivity forming parts 9-1 to 9-K for low-speed transmitting stations are provided for forming the transmitting antenna directivity, with which the null is turned in the plural high-speed transmitting mobile station directions.</p> |
