公开(公告)号：US11047968B2

公开(公告)日：2021-06-29

申请号：US16711855

申请日：2019-12-12

Applicant: PANASONIC INTELLECTUAL PROPERTY MANAGEMENT CO., LTD.

Inventor： Shoichi Iizuka ,  Takeshi Nakayama ,  Naoki Honma ,  Dai Sasakawa ,  Nobuyuki Shiraki ,  Kazuki Numazaki

IPC: G01S13/06 ,  G01S13/04 ,  H04L25/02 ,  H04B13/00 ,  H04B17/391 ,  H04B17/309 ,  H04B7/0413

Abstract: Complex transfer functions indicating characteristics of propagation between transmission antenna elements and N reception antenna elements are calculated from reception signals received by the N reception antenna elements during a predetermined period. Components affected by vital activity are extracted from the calculated complex transfer functions. A correlation matrix is calculated from changed components affected by vital activity. A steering vector for regions divided from a target region is calculated. A living-body signal intensity vector is estimated by performing compressed sensing for an unknown value that is the living-body signal intensity vector using a correlation matrix vector and an extended steering vector. The number of components constituting the living-body signal intensity vector and having a value of at least a predetermined threshold is estimated to be the number of living bodies, and positions of regions corresponding to the components are estimated to be estimated positions of the living bodies.

公开(公告)号：US10413229B2

公开(公告)日：2019-09-17

申请号：US15667437

申请日：2017-08-02

Applicant: Panasonic Intellectual Property Management Co., Ltd.

Inventor： Takeshi Nakayama ,  Shoichi Iizuka ,  Naoki Honma

IPC: A61B5/18 ,  A61B5/00 ,  A61B5/024 ,  A61B5/11 ,  A61B5/05 ,  A61B5/117

Abstract: A device that differentiates a living body includes at least one transmission antenna element that transmits a transmission signal to a predetermined range including the living body, N receivers that are arranged to surround a periphery of the predetermined range and each receive N reception signals using respective reception antenna elements of the receivers during a predetermined period, the N reception signals including a reflection signal resulting from the transmission signal reflected off the living body, memory that stores a teacher signal, a circuit that calculates a plurality of correlation coefficients according to the teacher signal and the N reception signals received by the N receivers and determines that the living body and the subject living body are identical to each other when a predetermined correlation coefficient included in the plurality of correlation coefficients is included in a predetermined value range.