RADIO WAVE ARRIVAL DIRECTION ESTIMATION DEVICE AND RADIO WAVE ARRIVAL DIRECTION ESTIMATION SYSTEM

摘要

PROBLEM TO BE SOLVED: To provide a radio wave arrival direction estimation device that can be downsized, the angle resolution and accuracy of which are high, and with which it is possible to reduce the amount of arithmetic.SOLUTION: The radio wave arrival direction estimation device comprises: a reception unit 100 provided with a turntable 112, a drive unit 113 for turning the turntable 112 on a fixed cycle, and an antenna 111 for receiving a radio wave transmitted by a wireless tag and secured to the turntable 112, the reception unit outputting a measurement signal that is a signal determined on the basis of the radio wave received by the antenna 111; and a direction determination unit 230 for calculating, while varying unknown parameters of an approximation model, the sum of squared derivation of a residual between an approximation model that represents the measurement signal using approximation where the radio wave transmitted by the wireless tag is approximated to a plane wave and that includes the arrival bearing angle and phase of the radio wave as unknown parameters and the measurement signal, and thereby determining an approximation model that matches the measurement signal, and determining that the bearing angle in the determined approximation model is a bearing angle from which the wave is arriving.SELECTED DRAWING: Figure 1