公开(公告)号：US20080077343A1

公开(公告)日：2008-03-27

申请号：US11852874

申请日：2007-09-10

Applicant: Leif Johansson

Inventor： Leif Johansson

IPC: G06F19/00

CPC classification number: G01M11/3118

Abstract: An implementation of coded time-domain reflectometry that can be incorporated in a transmitter as a built-in test function is disclosed. A sequence of a signal that is being transmitted is captured, delayed and used for correlation to a received reflected signal from the transmission medium. A correlation signal is obtained if the delay value of the captured signal sequence corresponds to the roundtrip delay from the transmitter to a reflection point of the medium. Based to the relation between delay values and the strength of the correlated signal, the magnitude of reflective points throughout the transmission medium can be evaluated. In the preferred embodiment, the transmitter is an optical transmitter, and the transmission medium is optical fiber.

Abstract translation: 公开了可以作为内置测试功能并入发射机的编码时域反射测量的实现。 被发送的信号的序列被捕获，延迟并用于与来自传输介质的接收的反射信号的相关。 如果捕获的信号序列的延迟值对应于从发射机到介质的反射点的往返延迟，则获得相关信号。 基于延迟值与相关信号的强度之间的关系，可以评估整个传输介质的反射点的大小。 在优选实施例中，发射机是光发射机，传输介质是光纤。