| 摘要 |
PROBLEM TO BE SOLVED: To provide a radio base device capable of calibrating another terminal with spatial multiplex, and to provide a method for calibrating transmission directivity of a terminal and a calibration program. SOLUTION: An adaptive base station 2 uses two antennas 23 and 24 to transmit/receive a signal to/from one antenna terminal 1 and also uses two antennas 21 and 22 to send a desired signal to an adaptive array terminal 3 to be a calibration target while directing null to the terminal 1. The signal from the antennas 23 and 24 to the terminal 1 becomes an interference signal to the terminal 3. The terminal 3 transmits a signal with transmission directivity for directing beams and null to desired signal sources 21 and 22 interference signal sources 23 and 24 on the basis of receiving weight, and the base station 2 measures a DU ratio. The terminal 3 corrects receiving weight so as to obtain an optimum DU ratio.
|
