公开(公告)号：US20150098712A1

公开(公告)日：2015-04-09

申请号：US14569417

申请日：2014-12-12

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhaohui Li ,  Linghao Cheng ,  Ke Wang

IPC: H04B10/564

CPC classification number: H04B10/564 ,  H04B10/0775 ,  H04B10/0779 ,  H04L25/022

Abstract: Embodiments of the present invention relate to a signal transmission method, transmitter, and signal transmission system. The method includes: obtaining, by a sending end, information about a power fading point of a fiber channel between the sending end and a receiving end; determining, by the sending end and according to the information about the power fading point, a subcarrier that is used to send a service signal to the receiving end on the fiber channel, where a frequency of the determined subcarrier is different from that of the power fading point; and sending, by the sending end, a service signal to the receiving end by using the determined subcarrier. According to the embodiments of the present invention, validity of a signal spectrum is ensured, and therefore it is ensured that transmitted data can be effectively recovered at a receiving end.

Abstract translation: 本发明的实施例涉及一种信号传输方法，发射机和信号传输系统。 该方法包括：通过发送端获取关于发送端和接收端之间的光纤信道的功率衰落点的信息; 由所述发送端根据所述功率衰减点的信息确定用于向所述光纤信道的接收端发送业务信号的子载波，其中所确定的副载波的频率与所述功率衰减点的频率不同 褪色点 并且通过使用所确定的子载波，由所述发送端向所述接收端发送业务信号。 根据本发明的实施例，确保信号频谱的有效性，从而确保在接收端能够有效地恢复发送的数据。

公开(公告)号：US10263697B2

公开(公告)日：2019-04-16

申请号：US15967267

申请日：2018-04-30

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhaohui Li ,  Yuli Chen ,  Dawei Wang

IPC: H04B10/61 ,  H04B10/077 ,  H04B10/079 ,  H04B10/2513

Abstract: The present disclosure discloses a method and an apparatus for monitoring chromatic dispersion in an optical communications network. The method includes: performing coherent mixing of a to-be-monitored signal with a first optical signal and a second optical signal to obtain two analog electrical signals, where center frequencies of the first optical signal and the second optical signal are located on two sides of a center frequency of the to-be-monitored signal, and a difference between the center frequencies of these two optical signals equals a Baud rate; converting the two analog electrical signals into two corresponding first time domain power signals; determining a value of a time delay between these two time domain power signals; and obtaining, according to a correspondence between the value of the time delay and the chromatic dispersion, the fiber chromatic dispersion generated in a process of transmitting the to-be-monitored signal.

公开(公告)号：US10484088B2

公开(公告)日：2019-11-19

申请号：US15277802

申请日：2016-09-27

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhaohui Li ,  Jianping Li ,  Dawei Wang

IPC: H04B10/079 ,  H04B10/50 ,  H04B10/61

Abstract: The present invention discloses an apparatus. The apparatus includes: a coherent receiving unit, configured to perform coherent synthesis on a received to-be-detected optical signal and a multi-wavelength local oscillation laser beam, and convert a coherent receiving signal formed by means of the coherent synthesis into an analog electrical signal; a data acquiring unit, configured to acquire the analog electrical signal output by the coherent receiving unit, and convert the analog electrical signal into a digital signal; a power spectrum generation unit, configured to process the digital signal output by the data acquiring unit, to generate a continuous full power spectrum of the to-be-detected optical signal; and an optical performance parameter monitoring unit, configured to monitor, according to the continuous full power spectrum generated by the power spectrum generation unit, an optical performance parameter of a transmission link carrying the to-be-detected optical signal.

公开(公告)号：US20170048002A1

公开(公告)日：2017-02-16

申请号：US15338150

申请日：2016-10-28

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhaohui Li ,  Xuebing Zhang ,  Huixiao Ma

IPC: H04B10/61 ,  H04B10/079

CPC classification number: H04B10/6162 ,  H04B10/00 ,  H04B10/07951 ,  H04B10/614 ,  H04B10/6151

Abstract: A receiver is provided, including a signal acquiring unit, a signal diversity unit that is connected to the signal acquiring unit, a signal combination unit that is connected to the signal diversity unit, and a digital-signal acquiring unit that is connected to the signal combination unit. The receiver can receive a dual-polarization signal and can eliminate SSBI from the dual-polarization signal.

Abstract translation: 提供接收机，包括信号获取单元，连接到信号获取单元的信号分集单元，连接到信号分集单元的信号组合单元和连接到信号的数字信号获取单元 组合单位 接收机可以接收双极化信号，并可以从双极化信号中消除SSBI。

公开(公告)号：US20180248618A1

公开(公告)日：2018-08-30

申请号：US15967267

申请日：2018-04-30

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhaohui Li ,  Yuli Chen ,  Dawei Wang

IPC: H04B10/079 ,  H04B10/2513 ,  H04J14/06

CPC classification number: H04B10/07951 ,  H04B10/0775 ,  H04B10/2513 ,  H04J14/06

Abstract: The present disclosure discloses a method and an apparatus for monitoring chromatic dispersion in an optical communications network. The method includes: performing coherent mixing of a to-be-monitored signal with a first optical signal and a second optical signal to obtain two analog electrical signals, where center frequencies of the first optical signal and the second optical signal are located on two sides of a center frequency of the to-be-monitored signal, and a difference between the center frequencies of these two optical signals equals a Baud rate; converting the two analog electrical signals into two corresponding first time domain power signals; determining a value of a time delay between these two time domain power signals; and obtaining, according to a correspondence between the value of the time delay and the chromatic dispersion, the fiber chromatic dispersion generated in a process of transmitting the to-be-monitored signal.

公开(公告)号：US09960856B2

公开(公告)日：2018-05-01

申请号：US15338150

申请日：2016-10-28

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhaohui Li ,  Xuebing Zhang ,  Huixiao Ma

IPC: H04B10/00 ,  H04B10/079 ,  H04B10/61

CPC classification number: H04B10/6162 ,  H04B10/00 ,  H04B10/07951 ,  H04B10/614 ,  H04B10/6151

Abstract: A receiver is provided, including a signal acquiring unit, a signal diversity unit that is connected to the signal acquiring unit, a signal combination unit that is connected to the signal diversity unit, and a digital-signal acquiring unit that is connected to the signal combination unit. The receiver can receive a dual-polarization signal and can eliminate SSBI from the dual-polarization signal.

公开(公告)号：US09520951B2

公开(公告)日：2016-12-13

申请号：US14569417

申请日：2014-12-12

Applicant: Huawei Technologies Co., Ltd.

Inventor： Zhaohui Li ,  Linghao Cheng ,  Ke Wang

IPC: H04B10/08 ,  H04B10/564 ,  H04B10/077 ,  H04L25/02

CPC classification number: H04B10/564 ,  H04B10/0775 ,  H04B10/0779 ,  H04L25/022

Abstract: Embodiments of the present invention relate to a signal transmission method, transmitter, and signal transmission system. The method includes: obtaining, by a sending end, information about a power fading point of a fiber channel between the sending end and a receiving end; determining, by the sending end and according to the information about the power fading point, a subcarrier that is used to send a service signal to the receiving end on the fiber channel, where a frequency of the determined subcarrier is different from that of the power fading point; and sending, by the sending end, a service signal to the receiving end by using the determined subcarrier. According to the embodiments of the present invention, validity of a signal spectrum is ensured, and therefore it is ensured that transmitted data can be effectively recovered at a receiving end.

Abstract translation: 本发明的实施例涉及一种信号传输方法，发射机和信号传输系统。 该方法包括：通过发送端获取关于发送端和接收端之间的光纤信道的功率衰落点的信息; 由所述发送端根据所述功率衰减点的信息确定用于向所述光纤信道的接收端发送业务信号的子载波，其中所确定的副载波的频率与所述功率衰减点的频率不同 褪色点 并且通过使用所确定的子载波，由所述发送端向所述接收端发送业务信号。 根据本发明的实施例，确保信号频谱的有效性，从而确保在接收端能够有效地恢复发送的数据。