公开(公告)号：US20230273251A1

公开(公告)日：2023-08-31

申请号：US18015441

申请日：2021-07-12

Applicant: Hitachi Astemo, Ltd.

Inventor： Soshi SHIMOMURA ,  Yasuhiro IKEDA ,  Yutaka UEMATSU ,  Hideyuki SAKAMOTO

IPC: G01R31/11 ,  H04B3/46

CPC classification number: G01R31/11 ,  H04B3/46

Abstract: A communication device includes: a transmitting circuit that repeatedly outputs a first prescribed signal to a transmission path at a prescribed cycle; a receiving circuit that receives a second prescribed signal repeatedly output at the prescribed cycle from another communication device via the transmission path; a waveform equivalence processing unit that performs waveform equivalence processing on the signal received by the receiving circuit; a holding unit that holds parameters of the waveform equivalence processing; a storage unit that stores information on a signal propagation speed in the transmission path, duration of a prescribed cycle, and a transmission rate; and an abnormality position determining unit that calculates a distance to a position of an abnormality in the transmission path using information on the parameter caused by the abnormality of the transmission path among the parameters and the information stored in the storage unit.