| 摘要 |
PROBLEM TO BE SOLVED: To provide a wireless base station apparatus capable of maintaining excellent speech quality of a terminal during communication successively with an original wireless base station, when the terminal moves from the original wireless base station during the communication to other base station by means of handover in an SDMA communication system. SOLUTION: Each of the wireless base station apparatuses for forming a transmission beam with individual radiation patterns by each terminal by means of the adaptive beam forming and the adaptive null steering for controlling the directivity of an array antenna so as to conduct wireless communication with each terminal in the SDMA wireless communication system, detects reception errors from a signal transmitted from each terminal. Each wireless base station apparatus executes the control of forming a deeper null, in a direction of a terminal the signal transmitted from which each wireless base station apparatus normally receives and control of maximizing the power transmitted, in the direction of a terminal the signal transmitted from which each wireless base station apparatus detects the error, when forming the radiation pattern with the directivity in the direction of the terminal the signal transmitted, from which each wireless base station apparatus detects the reception errors. COPYRIGHT: (C)2008,JPO&INPIT
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