| 摘要 |
PROBLEM TO BE SOLVED: To obtain the direction of a terminal based on a connection request signal from the terminal, to turn a null point where a radio wave area containing spurious radiation does not exist in the direction and to realize communication. SOLUTION: Connection request signals from a terminal Z, which are received by an array antenna 2, are supplied to an adaptive array 14 and a parameter estimation unit 15. The parameter estimation unit 15 detects information in the direction of the terminal Z with the output of the adaptive array 14 and the signal supplied from the antenna 2 and it is temporarily stored in a memory 16. A signal from a terminal A in which a directivity area is previously installed is received by the array antenna 2 and it is supplied to a signal synthesizer 17. The signal synthesizer 17 synthesizes the signal of the terminal A and information of the terminal Z, which is stored in the memory 16. Then, the null point of the antenna directivity, where a radio wave does not exist in the direction of the terminal Z, is turned without changing the directivity area against the terminal A.
|
