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公开(公告)号：US12143146B2
公开(公告)日：2024-11-12
申请号：US17987393
申请日：2022-11-15
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Jinshan Wang , Liming Fang , Yanbo Zhao , Yanbin Sun , Jianfei Liu , Yumeng Yang , Chao Wang
Abstract: An echo cancellation method and a transceiver to reduce dependence of a system on an enob of a DAC, and improve performance of echo cancellation. The transceiver includes an echo cancellation apparatus, a transmit link, a receive link, and a hybrid circuit. The transmit link and the receive link are coupled to a transmission line by using the hybrid circuit. The echo cancellation apparatus includes a first signal converter, a slicer, a first subtractor, a second digital-to-analog converter, a second subtractor, and a third subtractor.
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公开(公告)号：US20190273634A1
公开(公告)日：2019-09-05
申请号：US16413811
申请日：2019-05-16
Applicant: Huawei Technologies Co., Ltd.
Inventor： Guikai Peng , Huafeng Lin , Shiwei Nie , Xuming Wu , Liming Fang , Yinghua Dong
Abstract: A passive optical network communication method, including receiving an Ethernet packet carrying an optical network unit identifier, determining a correspondence between the optical network unit identifier and an optical network unit type according to the optical network unit identifier, determining that an optical network unit that receives the Ethernet packet is a first type of optical network unit, where the optical network unit type includes the first and second type of optical network unit, and a packet receiving rate of the first type is different from that of the second type, determining a correspondence between the optical network unit type and a channel according to the first type, determining a channel corresponding to the first type, encapsulating the Ethernet packet into a gigabit-capable passive optical network encapsulation method (GEM) frame, and sending the GEM frame to the first type of optical network unit using the determined channel.
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公开(公告)号：US11929856B2
公开(公告)日：2024-03-12
申请号：US17986485
申请日：2022-11-14
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Yanbo Zhao , Jianfei Liu , Jinshan Wang , Yanbin Sun , Liming Fang
IPC: H04L27/26
CPC classification number: H04L27/26
Abstract: This application provides a narrowband interference isolation method and a communication apparatus. An example method includes: determining a parameter of a narrowband interference signal; determining a coefficient of a first filter based on the parameter of the narrowband interference signal, wherein the first filter is located at a receive end of a master communication device, and the coefficient of the first filter is for filtering out the narrowband interference signal; and sending the parameter of the narrowband interference signal or the coefficient of the first filter to M slave communication devices using an Ethernet operation, administration, and maintenance (OAM) frame, wherein the master communication device is connected to the M slave communication devices, M≥1, and M is an integer.
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公开(公告)号：US08614939B2
公开(公告)日：2013-12-24
申请号：US13648843
申请日：2012-10-10
Applicant: Huawei Technologies Co., Ltd.
Inventor： Raphael Cendrillon , Liming Fang
IPC: H04J1/12
CPC classification number: H04B3/464 , H04B3/32 , H04B3/487 , H04L5/14 , H04L25/0204 , H04L25/0212 , H04M11/062
Abstract: A method and apparatus for crosstalk channel estimation based on a measured signal-to-noise (SNR) of a loaded line. The method for channel estimation includes: loading, on a newly added line K, a combination of K−1 signals sent on lines 1 to K−1; obtaining a measured SNR of the line K loaded with the combination of the K−1 signals sent on the lines 1 to K−1; and calculating crosstalk channels of the line K according to K−1 coefficients of the K−1 signals sent on the lines 1 to K−1 and the measured SNR. Embodiments of the present invention may be used for relevant network communications systems such as xDSL systems.
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公开(公告)号：US11063783B2
公开(公告)日：2021-07-13
申请号：US16413811
申请日：2019-05-16
Applicant: Huawei Technologies Co., Ltd.
Inventor： Guikai Peng , Huafeng Lin , Shiwei Nie , Xuming Wu , Liming Fang , Yinghua Dong
Abstract: A passive optical network communication method, including receiving an Ethernet packet carrying an optical network unit identifier, determining a correspondence between the optical network unit identifier and an optical network unit type according to the optical network unit identifier, determining that an optical network unit that receives the Ethernet packet is a first type of optical network unit, where the optical network unit type includes the first and second type of optical network unit, and a packet receiving rate of the first type is different from that of the second type, determining a correspondence between the optical network unit type and a channel according to the first type, determining a channel corresponding to the first type, encapsulating the Ethernet packet into a gigabit-capable passive optical network encapsulation method (GEM) frame, and sending the GEM frame to the first type of optical network unit using the determined channel.
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Patent Agency Ranking
公开(公告)号：US20180145767A1
公开(公告)日：2018-05-24
申请号：US15857019
申请日：2017-12-28
Applicant: Huawei Technologies Co., Ltd.
Inventor： Liming Fang , Lei Zhou , Meng Sui , Xiaofeng Zhang
CPC classification number: H04B10/6162 , H04B10/2504 , H04B10/60 , H04J13/16
Abstract: An apparatus for despreading in an optical domain configured to split a received optical signal into a first optical signal and a second optical signal, perform phase deflection on the second optical signal, output a third optical signal, perform phase deflection on the first optical signal and the third optical signal, output a fourth optical signal and a fifth optical signal to a balanced receiver, and superimpose the fourth optical signal and the fifth optical signal to generate a first electrical signal. A multiplication operation in conventional code division multiple access (CDMA) despreading is transferred from an electrical domain to an optical domain such that a chip rate can be easily raised to 20 gigahertz (GHz) or even to 25 GHz, a maximum rate of 100 gigabits per second (Gbps) can be provided in a single wavelength, and a user requirement for high bandwidth can be met.
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公开(公告)号：US09787357B2
公开(公告)日：2017-10-10
申请号：US14734745
申请日：2015-06-09
Applicant: Huawei Technologies Co., Ltd.
Inventor： Liming Fang
CPC classification number: H04B3/32 , H04B1/62 , H04J1/12 , H04L2012/6478
Abstract: A method for reducing far-end crosstalk in a digital line system is provided. The method includes receiving a noise related value fed back from a first receiving end to a first transmitting end over a first line. The method further includes pre-coding, a first signal and crosstalk source signals according to values of filtering parameters to form a synthesized signal corresponding to the first line. The crosstalk source signals are related to second signals over a second line. The method further includes transmitting the synthesized signal from the first transmitting end to the first receiving end over the first line. A corresponding device for reducing far-end crosstalk in a digital line system is provided.
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公开(公告)号：US20150214970A1
公开(公告)日：2015-07-30
申请号：US14607282
申请日：2015-01-28
Applicant: Huawei Technologies Co., Ltd.
Inventor： Mingjun Fan , Liming Fang , Yuan Liu
IPC: H03M1/12
CPC classification number: H03M1/12 , H03M1/00 , H03M1/0602 , H03M1/365 , H03M7/165
Abstract: The present invention relates to an analog to digital converter. The analog to digital converter includes comparing modules at multi levels, where a comparing module at each level includes a comparator and a metastable state determining unit. The comparator is configured to, when a previous-level comparing module is not in a metastable state, receive a first clock, a first input signal, and a second input signal, and compare the first input signal with the second input signal. The metastable state determining unit is configured to, when the previous-level comparing module is not in a metastable state, receive the first clock, generate a reference clock according to the first clock, and if a second clock that is output by the comparator is later than the reference clock, determine that the current-level comparing module is in a metastable state.
Abstract translation: 本发明涉及一种模数转换器。 模数转换器包括在多级别比较模块，其中每个级别的比较模块包括比较器和亚稳态确定单元。 比较器被配置为当前一级比较模块不处于亚稳状态时，接收第一时钟，第一输入信号和第二输入信号，并将第一输入信号与第二输入信号进行比较。 亚稳态确定单元被配置为当前级电平比较模块不处于亚稳态时，接收第一时钟，根据第一时钟生成参考时钟，并且如果由比较器输出的第二时钟是 晚于参考时钟，确定当前级别的比较模块处于亚稳状态。
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公开(公告)号：US20240107205A1
公开(公告)日：2024-03-28
申请号：US18533429
申请日：2023-12-08
Applicant: Huawei Technologies Co., Ltd.
Inventor： Xing Xu , Yumeng Yang , Liming Fang
CPC classification number: H04Q11/0005 , H04B10/5053 , H04Q2011/0024 , H04Q2011/0058
Abstract: Embodiments of this application disclose a switch and a communication system. The switch in embodiments of this application includes a first laser and a first optical splitter. The first laser is configured to provide a first laser light. The first optical splitter is configured to split the first laser light into a first downstream laser light and a second downstream laser light, where the first downstream laser light is used for transmitting information to a first terminal, and the second downstream laser light is used for transmitting information to a second terminal.
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公开(公告)号：US10897311B2
公开(公告)日：2021-01-19
申请号：US16452389
申请日：2019-06-25
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Liqiang Yu , Liming Fang , Sulin Yang , Xiaofeng Zhang
IPC: H04B10/04 , H04B10/50 , G02F1/015 , H01S5/00 , H04B10/564
Abstract: An optical signal modulation circuit includes a laser (DFB), a modulator (EAM), and an operational amplifier. The laser (DFB) generates a laser to stimulate the modulator (EAM) to generate a photon-generated current (ip), a first port (a) of the modulator (EAM) is connected to a first input voltage (Vbias), a second port (b) of the modulator (EAM) is connected to an inverting input end of the operational amplifier, a non-inverting input end of the operational amplifier is connected to a second input voltage (Vin), and an output end of the operational amplifier is connected to the first port (a) of the modulator. In the modulation circuit, a photon-generated current (ip) of the EAM is fed back to the operational amplifier, to implement a linear relationship between the second input voltage (Vin) and the photon-generated current (ip) of the EAM, and obtain a linear EML transmission curve, namely, a high-linearity EML.
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