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11.发明申请公开(公告)号：US20160112123A1
公开(公告)日：2016-04-21
申请号：US14518881
申请日：2014-10-20
Applicant: Huawei Technologies Co., Ltd.
Inventor： Chen Chen , Chuandong Li , Zhuhong Zhang
IPC: H04B10/079 , H04B10/572 , H04B10/564
CPC classification number: H04B10/07955 , H04B10/0799 , H04B10/548 , H04B10/572 , H04J14/0227
Abstract: System and method embodiments are provided for carrier-signal power ratio (CSPR) control in direct detection optical systems. In an embodiment, a method for CSPR control in a direct detection optical system includes receiving an electrical signal in a receiver (RX) digital signal processor (DSP), wherein the electrical signal is obtained from a corresponding optical signal via a direct detection component; estimating, a CSPR for the electrical signal; generating one of a control signal according to the CSPR; and transmitting the control signal to one of an optical filter and a laser, wherein the wavelength control signal controls causes a center wavelength (CW) of one of the optical filter and the laser to be adjusted such that an offset between the CW of the laser and the CW of the optical filter results in a desired CSPR.
Abstract translation: 为直接检测光学系统中的载波信号功率比（CSPR）控制提供了系统和方法实施例。 在一个实施例中，用于直接检测光学系统中的CSPR控制的方法包括在接收器（RX）数字信号处理器（DSP）中接收电信号，其中经由直接检测部件从对应的光信号获得电信号; 估计电信号的CSPR; 根据CSPR产生控制信号之一; 以及将所述控制信号发送到光学滤波器和激光器之一，其中所述波长控制信号控制导致所述滤光器和所述激光器之一的中心波长（CW）被调整为使得所述激光器的CW之间的偏移 并且滤光器的CW产生期望的CSPR。
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公开(公告)号：US11770276B1
公开(公告)日：2023-09-26
申请号：US17962060
申请日：2022-10-07
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Ahmed Mohamed Medra , Hossein Najafi , Ali Bakhshali , Jin Wang , Chuandong Li , Zhuhong Zhang
CPC classification number: H04L25/03057 , H04B7/10
Abstract: The disclosed systems and methods for compensating the polarization dependent loss (PDL) in communication networks comprising: i) filtering, by a first feed-forward filter, a current set of symbols in an equalized X-Pol signal; ii) filtering, by a second feed-forward filter, a current set of symbols in an equalized Y-Pol signal; iii) filtering, by a first feed-backward filter, a previously decided set of symbols associated with the equalized X-Pol signal; iv) filtering, by a second feed-backward filter a previously decided set of symbols associated with the equalized Y-Pol signal; v) adding, by a first adder, the outputs from the first feed-forward filter and the second feed-forward filter; and vi) subtracting, by the first adder, the outputs from the first feed-backward filter and the second feed-backward filter from the addition of outputs from the first feed-forward filter and the second feed-forward filter to determine the symbols in the equalized X-Pol signal.
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公开(公告)号：US09755761B2
公开(公告)日：2017-09-05
申请号：US15342832
申请日：2016-11-03
Applicant: Huawei Technologies Co., Ltd.
Inventor： Zhuhong Zhang , Chuandong Li
IPC: H04B10/00 , H04B10/61 , H04B10/25 , H04B10/079 , H04B10/516 , H04J14/06
CPC classification number: H04B10/616 , H04B10/0795 , H04B10/25 , H04B10/5161 , H04B10/61 , H04J14/06
Abstract: An apparatus comprising a receiver configured to receive an optical signal that carries a multi-rate data signal associated with a first transmission data rate and a second transmission data rate. The apparatus further comprises a processor configured to convert the optical signal into a plurality of digital electrical signals, decode a first portion of the digital electrical signals according to a first modulation format associated with the first transmission data rate, detect a rate change signaling block in the digital electrical signals that indicates a rate change from the first transmission data rate to the second transmission data rate associated with a second modulation format, and decode a second portion of the digital electrical signals received after the rate change signaling block according to the second modulation format.
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公开(公告)号：US09608723B2
公开(公告)日：2017-03-28
申请号：US14518881
申请日：2014-10-20
Applicant: Huawei Technologies Co., Ltd.
Inventor： Chen Chen , Chuandong Li , Zhuhong Zhang
IPC: H04B10/079 , H04B10/572 , H04J14/02
CPC classification number: H04B10/07955 , H04B10/0799 , H04B10/548 , H04B10/572 , H04J14/0227
Abstract: System and method embodiments are provided for carrier-signal power ratio (CSPR) control in direct detection optical systems. In an embodiment, a method for CSPR control in a direct detection optical system includes receiving an electrical signal in a receiver (RX) digital signal processor (DSP), wherein the electrical signal is obtained from a corresponding optical signal via a direct detection component; estimating, a CSPR for the electrical signal; generating one of a control signal according to the CSPR; and transmitting the control signal to one of an optical filter and a laser, wherein the wavelength control signal controls causes a center wavelength (CW) of one of the optical filter and the laser to be adjusted such that an offset between the CW of the laser and the CW of the optical filter results in a desired CSPR.
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公开(公告)号：US20250141585A1
公开(公告)日：2025-05-01
申请号：US18494408
申请日：2023-10-25
Applicant: Huawei Technologies Co., Ltd.
Inventor： Amirhossein Mohammadian , Ahmed Mohamed Medra , Chuandong Li
IPC: H04J14/02
Abstract: Embodiments of this disclosure provide a communication method and device. In the disclosure, when the first device and the second device in the Point-to-Multipoint network communicate with each other, if there is a first channel in inactive state between the two devices, which is active between the second device and the third device, and there is a second channel in inactive state between the second device and the third device, the second channel will be adopted to transmit the signal on the first channel, and then the state of the first channel will be changed to inactive state. After that, the state of the first channel between the first device and the second device will be changed to active state.
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Patent Agency Ranking
公开(公告)号：US20190199443A1
公开(公告)日：2019-06-27
申请号：US16293324
申请日：2019-03-05
Applicant: Huawei Technologies Co., Ltd.
Inventor： Mahdi Zamani , Jeebak Mitra , Hossein Najafi , Zhuhong Zhang , Chuandong Li
IPC: H04B10/61
CPC classification number: H04B10/616 , H04B10/548 , H04B10/5561 , H04B10/613 , H04B10/614
Abstract: Aspects of the present disclosure are directed in part to a receiver DSP unit including an equalization module. The equalization module includes a trellis-based equalization module that may utilize multiple trellis-based processors (TBP), which can each be individually adaptively configured for performing a trellis-based equalization. The design of the TBPs allows them to be configured for compensating a residual Inter-Symbol Interference (ISI) as well as compensating a residual Phase Noise (PN). ISI is an example of an additive impairment and PN is an example of a multiplicative impairment that communication systems, particularly high speed transmission systems such as coherent optical systems, can suffer from.
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公开(公告)号：US09998274B2
公开(公告)日：2018-06-12
申请号：US15353394
申请日：2016-11-16
Applicant: Huawei Technologies Co., Ltd.
Inventor： Mahdi Zamani , Mehdi Torbatian , Jeebak Mitra , Zhuhong Zhang , Chuandong Li
CPC classification number: H04L7/0075 , H04B10/60
Abstract: An optical channel between a coherent optical transmitter and a coherent optical receiver may include one or more components that act as a bandpass filter with a passband that is narrower than the signal bandwidth. Such a narrow filter may significantly attenuate the signal content close to the band edge of the data signal. As a result, timing error detection may work less effectively, and therefore clock recovery may be less effective or fail. Methods and systems are disclosed in which a single optical carrier is used to transmit a data signal that has multiple bands, and timing error detection is performed at the receiver using one or more inner bands of the multiple bands. The timing error detection may therefore be made more robust to the effects of the narrow filtering.
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公开(公告)号：US20170078028A1
公开(公告)日：2017-03-16
申请号：US15342832
申请日：2016-11-03
Applicant: Huawei Technologies Co., Ltd.
Inventor： Zhuhong Zhang , Chuandong Li
IPC: H04B10/61 , H04B10/25 , H04B10/516 , H04J14/06
CPC classification number: H04B10/616 , H04B10/0795 , H04B10/25 , H04B10/5161 , H04B10/61 , H04J14/06
Abstract: An apparatus comprising a receiver configured to receive an optical signal that carries a multi-rate data signal associated with a first transmission data rate and a second transmission data rate. The apparatus further comprises a processor configured to convert the optical signal into a plurality of digital electrical signals, decode a first portion of the digital electrical signals according to a first modulation format associated with the first transmission data rate, detect a rate change signaling block in the digital electrical signals that indicates a rate change from the first transmission data rate to the second transmission data rate associated with a second modulation format, and decode a second portion of the digital electrical signals received after the rate change signaling block according to the second modulation format.
Abstract translation: 一种装置，包括：接收机，被配置为接收携带与第一传输数据速率和第二传输数据速率相关联的多速率数据信号的光信号。 该装置还包括处理器，其被配置为将光信号转换成多个数字电信号，根据与第一传输数据速率相关联的第一调制格式对数字电信号的第一部分进行解码，检测数字电信号中的速率变化信号块 指示从第一传输数据速率到与第二调制格式相关联的第二传输数据速率的速率改变的数字电信号，并且根据第二调制解码在速率改变信令块之后接收的数字电信号的第二部分 格式。
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公开(公告)号：US20160323660A1
公开(公告)日：2016-11-03
申请号：US15205670
申请日：2016-07-08
Applicant: Huawei Technologies Co., Ltd.
Inventor： Zhiping Jiang , Chen Chen , Zhuhong Zhang , Chuandong Li
IPC: H04Q11/00 , H04B10/50 , H04B10/572 , H04B10/25
Abstract: An optical circuit switching matrix includes a plurality of optical ports, each optical port being optically coupled to a respective one of a plurality of user nodes and an optical coupler having at least one input port optically coupled to the plurality of optical ports, and an output port. The optical circuit switching matrix also includes a wavelength demultiplexer having an input optically coupled to the output port of the optical coupler, and a plurality of output ports, each output port being optically coupled to a respective one of the plurality of optical ports.
Abstract translation: 光学电路切换矩阵包括多个光学端口，每个光学端口光耦合到多个用户节点中的相应一个用户节点，以及光耦合器，该光耦合器具有光耦合到多个光学端口的至少一个输入端口，以及输出端 港口。 光电路切换矩阵还包括具有光耦合到光耦合器的输出端口的输入的波长解复用器和多个输出端口，每个输出端口光耦合到多个光端口中的相应一个光端口。
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公开(公告)号：US20160261364A1
公开(公告)日：2016-09-08
申请号：US14877280
申请日：2015-10-07
Applicant: Huawei Technologies Co., Ltd.
Inventor： Zhiping Jiang , Chen Chen , Zhuhong Zhang , Chuandong Li
IPC: H04J14/02
CPC classification number: H04Q11/0005 , H04B10/25 , H04B10/503 , H04B10/572 , H04J14/021 , H04J14/0275 , H04J14/0282 , H04Q2011/0015 , H04Q2011/0016 , H04Q2011/0018 , H04Q2011/0032 , H04Q2011/0033 , H04Q2011/0039 , H04Q2011/0041 , H04Q2011/005 , H04Q2011/0058
Abstract: An optical circuit switching matrix includes a plurality of optical ports, each optical port being optically coupled to a respective one of a plurality of user nodes and an optical coupler having at least one input port optically coupled to the plurality of optical ports, and an output port. The optical circuit switching matrix also includes a wavelength demultiplexer having an input optically coupled to the output port of the optical coupler, and a plurality of output ports, each output port being optically coupled to a respective one of the plurality of optical ports.
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