| 摘要 |
PROBLEM TO BE SOLVED: To expand a coverage area of downward control channel information without increasing a transmission power by obtaining high antenna gain with the formation of integrated directivity through a directivity controlling part. SOLUTION: A specific radio terminal receives downward control channel information and sends information such as position registration as necessary through an upward control channel. A radio base station unit accumulates a base band signal of a known signal part that is included in an upward reference signal in buffer memory 42. A weighting part 5 weights it, an adding part 6 synthesizes it with each branch, a detecting part 7 demodulates it and an error operating part 41 compares it with an ideal known signal that does not have noise nor interference. A weight calculating part 4 adjusts the weight of each branch so that the error signal may be minimum to the known signal part and sets it. As for total antenna integrated directivity that is calculated by an output signal of the part 6, a directivity to which a main lobe turns is formed so that the direction of a specific radio terminal may have maximum gain. |
