ARRIVAL DIRECTION ESTIMATION SYSTEM, AND ARRIVAL DIRECTION ESTIMATION METHOD

• Main Authors: TAKIZAWA MASANORI, KAWAMURA HISASHI
• Format: Patent
• Language: English; Japanese
• Published: 24.06.2021
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; ANTENNAS, i.e. RADIO AERIALS; BASIC ELECTRIC ELEMENTS; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; ELECTRICITY; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

To provide an arrival direction estimation system and an arrival direction estimation method, enabling the arrival direction of an electromagnetic wave to be estimated with high accuracy using all polarized waves having been received at the same position.SOLUTION: In an arrival direction estimation system 1, three antennas 6 capable of receiving polarized waves different from each other among orthogonal three polarized waves are arranged adjacent to each other in the circumferential direction on the circumference of the same circle C1 in a rotor 5. An antenna movement control unit 42a in an outside control device 40 rotationally drives the rotor 5 and moves the rotor 5 in such a manner that each antenna 6 can stop at an arbitrary position P1 on the circumference. An arrival direction estimation processing unit 42b performs the process of estimating the arrival direction of signals arriving from surrounding radio devices 60a, 60b, on the basis of received signals of respective polarized waves at the position P1 by each antenna 6.SELECTED DRAWING: Figure 5 【課題】同位置で受信した全ての偏波成分を用いて電磁波の到来方向を精度よく推定可能な到来方向推定システム、及び到来方向推定方法を提供する。【解決手段】到来方向推定システム１において、回転体５には、直交３偏波のうちの互いに異なる偏波を受信可能な３つのアンテナ６が、同一の円Ｃ１の円周上に周方向に隣接して配置されている。外部制御装置４０において、アンテナ移動制御部４２ａは、回転体５を回転駆動し、各アンテナ６を円周上の任意の位置Ｐ１で停止可能に周方向に移動させる。到来方向推定処理部４２ｂは、位置Ｐ１での各アンテナ６によるそれぞれの偏波の受信信号に基づき、周辺の無線装置６０ａ、６０ｂから到来する信号の到来方向を推定する処理を行う。【選択図】図５