BASE RADIO STATION EQUIPMENT, METHOD AND PROGRAM FOR TRANSMISSION DIRECTIVITY CALIBRATION

摘要

PROBLEM TO BE SOLVED: To provide a base radio station equipment, a transmission directivity calibration method and a calibration program where the calibration precision of transmission directivity is improved. SOLUTION: A desired signal and an interference signal are sent from a two-antenna terminal or an adaptive array 2 to an adaptive array base station 1 being the object of calibration, and array-received simultaneously by all the antennas of the adaptive array base station 1. The antennas of the adaptive array base station 1 forms a transmission directivity pattern facing a beam and a null to a desired signal source and an interference signal source based on reception weight and the terminal or base station 2 measures a DU ratio. The base station 1 corrects the reception weight so as to obtain an optimal DU ratio and determines the corrected value to be a calibration correction value.