公开(公告)号：US12101123B2

公开(公告)日：2024-09-24

申请号：US17941012

申请日：2022-09-08

申请人： Shanghai Jiao Tong University

发明人： Liang Hu ,  Qi Li ,  Guiling Wu ,  Jiao Liu ,  Jianping Chen

IPC分类号： H04B10/25 ,  H04B10/43

CPC分类号： H04B10/43 ,  H04B10/25891

摘要： An optical millimeter wave terahertz transfer system and transfer method are disclosed. The device comprises a local terminal, a transfer link, an access terminal, and a user terminal. By using the device in the transfer link, optical signals transferred forward and backward are extracted through optical couplers, and millimeter wave terahertz signals with a stable phase are obtained at any position in the transfer link through optical signal filtering, photovoltaic conversion, microwave filtering, frequency division and optical frequency shift processing. The device and method have the characteristics of high reliability, simple structure, and low implementation cost.

公开(公告)号：US10063315B2

公开(公告)日：2018-08-28

申请号：US15389389

申请日：2016-12-22

申请人： Shanghai Jiao Tong University

发明人： Guiling Wu ,  Liang Hu ,  Hao Zhang ,  Jianping Chen

IPC分类号： H04B10/00 ,  H04B10/079 ,  H04J14/08 ,  H04B10/25 ,  H04L7/00 ,  H04J3/06

CPC分类号： H04B10/0795 ,  H04B10/2503 ,  H04B10/27 ,  H04J3/0638 ,  H04J3/065 ,  H04J14/08 ,  H04L7/0075

摘要： A method and system for high-precision two-way fiber-optic time transfer comprising pre-adjusting, including calculating a local timing signal adjustment amount for a first fiber-optic time synchronization unit and a second fiber-optic time synchronization unit, and the corresponding adjusting. and following steps including the two fiber-optic time synchronization units conducting two-way time transfer based on a time division multiplexing transmission over an optical fiber link. The present invention realizes high-precision fiber-optic time transfer by combining two-way time transfer and bidirectional time division multiplexing technique.

公开(公告)号：US11764876B2

公开(公告)日：2023-09-19

申请号：US17733972

申请日：2022-04-29

申请人： Shanghai Jiao Tong University

发明人： Liang Hu ,  Guiling Wu ,  Jianping Chen

IPC分类号： H04B10/50 ,  H04B10/58 ,  H04B10/2575 ,  H04B10/25 ,  H04B10/11 ,  H04B10/2507 ,  H04B10/548 ,  H04B10/60 ,  H04B10/69

CPC分类号： H04B10/58 ,  H04B10/11 ,  H04B10/25 ,  H04B10/2507 ,  H04B10/2575 ,  H04B10/25759 ,  H04B10/50 ,  H04B10/548 ,  H04B10/60 ,  H04B10/697

摘要： An optical frequency transfer device based on passive phase compensation and a transfer method are provided, where the device comprises a local side, a transfer link and a user side. Optical frequency transfer based on passive phase compensation is achieved by simple optical frequency mixing, microwave filtration, and frequency division processing in a passive phase compensation manner, and the device has simple system structure and high reliability.

公开(公告)号：US20150093122A1

公开(公告)日：2015-04-02

申请号：US14562000

申请日：2014-12-05

申请人： Shanghai Jiao Tong University

发明人： Guiling WU ,  Liang Hu ,  Jianguo Shen ,  Weiwen Zou ,  Jianping Chen

IPC分类号： H04B10/524 ,  H04L25/49

CPC分类号： H04B10/524 ,  G01S19/00 ,  H03M5/14 ,  H04L1/00 ,  H04L25/00 ,  H04L25/4902

摘要： A format for modified IRIB-G time code, with added message fields while preserving pulse width coding rule of the standard IRIG-B time code, having a time interval field for carrying time interval between the local time signal and a received time signal, and a user-defined or padded field for carrying user-defined time and/or control messages. An encoding and a decoding methods and devices for high-precision time transfer, where the modified IRIG-B time code carries more messages, and enabling transmission of timing messages and testing messages of two-way time comparison via a single message channel at the same time, which reduces fluctuation due to encoding and decoding manipulation and correlation with working frequencies via exact synchronization between the on-times of the output encoded time code and the transmitted time signal, and between the on-times of the output decoded time signal and the input time code, and improves precision of time transfer.

摘要翻译： 用于修改的IRIB-G时间码的格式，具有添加的消息字段，同时保留标准IRIG-B时间码的脉冲宽度编码规则，具有用于承载本地时间信号和接收到的时间信号之间的时间间隔的时间间隔字段，以及 用于承载用户定义的时间和/或控制消息的用户定义或填充字段。 用于高精度时间传输的编码和解码方法和装置，其中修改的IRIG-B时间码携带更多消息，并且通过相同的单个消息信道实现定时消息的传输和双向时间比较的测试消息 时间，其通过编码和解码操作的波动以及通过输出编码时间码的接通时间与发送的时间信号之间的精确同步以及在输出解码时间信号的导通时间与 输入时间码，提高时间传输的精度。

公开(公告)号：US09537576B2

公开(公告)日：2017-01-03

申请号：US14562000

申请日：2014-12-05

申请人： Shanghai Jiao Tong University

发明人： Guiling Wu ,  Liang Hu ,  Jianguo Shen ,  Weiwen Zou ,  Jianping Chen

IPC分类号： H03K7/08 ,  H03K9/08 ,  H04B10/524 ,  H03M5/14 ,  H04L25/49 ,  G01S19/00 ,  H04L1/00 ,  H04L25/00

CPC分类号： H04B10/524 ,  G01S19/00 ,  H03M5/14 ,  H04L1/00 ,  H04L25/00 ,  H04L25/4902

摘要： A format for modified IRIB-G time code, with added message fields while preserving pulse width coding rule of the standard IRIG-B time code, having a time interval field for carrying time interval between the local time signal and a received time signal, and a user-defined or padded field for carrying user-defined time and/or control messages. An encoding and a decoding methods and devices for high-precision time transfer, where the modified IRIG-B time code carries more messages, and enabling transmission of timing messages and testing messages of two-way time comparison via a single message channel at the same time, which reduces fluctuation due to encoding and decoding manipulation and correlation with working frequencies via exact synchronization between the on-times of the output encoded time code and the transmitted time signal, and between the on-times of the output decoded time signal and the input time code, and improves precision of time transfer.

摘要翻译： 用于修改的IRIB-G时间码的格式，具有添加的消息字段，同时保留标准IRIG-B时间码的脉冲宽度编码规则，具有用于承载本地时间信号和接收到的时间信号之间的时间间隔的时间间隔字段，以及 用于承载用户定义的时间和/或控制消息的用户定义或填充字段。 用于高精度时间传输的编码和解码方法和装置，其中修改的IRIG-B时间码携带更多消息，并且通过相同的单个消息信道实现定时消息的传输和双向时间比较的测试消息 时间，其通过编码和解码操作的波动以及通过输出编码时间码的接通时间与发送的时间信号之间的精确同步以及在输出解码时间信号的导通时间与 输入时间码，提高时间传输的精度。