OBJECT DETECTOR, METHOD FOR DETECTING OBJECT, AND OBJECT DETECTION SYSTEM

• Main Authors: OTSUKI SHINYA, MURAKAMI TOMOKI, MUTA OSAMU, TAKADA KEISUKE
• Format: Patent
• Language: English; Japanese
• Published: 16.05.2023
• Subjects: ANALOGOUS ARRANGEMENTS USING OTHER WAVES; DETECTING MASSES OR OBJECTS; DETERMINING DISTANCE OR VELOCITY BY USE OF RADIO WAVES; GEOPHYSICS; GRAVITATIONAL MEASUREMENTS; LOCATING OR PRESENCE-DETECTING BY USE OF THE REFLECTION ORRERADIATION OF RADIO WAVES; MEASURING; PHYSICS; RADIO DIRECTION-FINDING; RADIO NAVIGATION; TESTING

To provide an object detector desirable for detecting an object that does not hold a special device on the basis of propagation channel information measured by a wireless terminal station, the object detector suppressing instant influence of errors caused by noises or the like and detecting an object without a device in a detection area with a constant accuracy.SOLUTION: An object detector 40 detects an object in a detection area between a wireless base station 10 and a wireless terminal station 20. The object detector receives a feedback signal sent with information related to propagation channel information (CSI) estimated by the wireless terminal station 20 for each sub carrier of a communication wave. An extraction unit 44 extracts information related to the CSI from the feedback signal. An information combining unit 48 generates a time-series CSI by combining information related to the CSI in time series. A determination unit 52 detects an object on the basis of the time-series CSI.SELECTED DRAWING: Figure 1 【課題】この開示は、無線端末局が測定する伝搬チャネル情報に基づいて、特別なデバイスを保持しない物体を検出するうえで好適な物体検出装置に関し、ノイズ等に起因する瞬間的な誤差の影響を抑えて、検出エリア内のデバイスフリーの物体を常に高い精度で検出することを目的とする。【解決手段】無線基地局１０と無線端末局２０との間の検出エリアにおける物体検出を行う。物体検出装置４０は、無線端末局２０が通信波のサブキャリア毎に推定した伝搬チャネル情報（CSI）に関わる情報を乗せて送信するフィードバック信号を受信する。抽出部４４は、フィードバック信号からCSIに関わる情報を抽出する。情報結合部４８は、CSIに関わる情報を時系列に結合して時系列CSIを生成する。判定部５２は、時系列CSIに基づいて物体検出を行う。【選択図】図１