APPARATUS AND METHOD FOR DETECTING ELECTRIC WAVE ARRIVAL DIRECTION

摘要

PROBLEM TO BE SOLVED: To simultaneously detect a plurality of electric wave arrival directions, with high detection accuracy. SOLUTION: When the set of the reactance value of different variable reactance elements 12-1 to 12-6 is set, each receiving signal y(t) received according to an array antenna device 100 is detected, a correlation matrix Rhzz, based on each reception signal is calculated, the calculated correlation matrix Rhzzis subjected to characteristics value decomposition, to calculate the characteristic valueαmof the correlation matrix Rhzz, a correlation matrix Rhnnbased on noise is calculated, on the basis of the calculated characteristic valueαm; a correlation matrix Rhyybased on a transmitted radio signal is calculated, based on the two calculated correlation matrices Rhzzand Rhnn; the calculated correlation matrix Rhyyis subjected to characteristic value decomposition to calculate a characteristic vector wk, and the arrival azimuth angle of the reception signal received, using ESPRIT method, based on the calculated characteristic vector wkand selective matrices J1, J2in the ESPRIT method, corresponding to the first and second sub arrays. COPYRIGHT: (C)2005,JPO&NCIPI