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1. 发明申请

US20190273634A1 Passive Optical Network Communication Method, Apparatus, and System 审中-公开
公开(公告)号：US20190273634A1
公开(公告)日：2019-09-05
申请号：US16413811
申请日：2019-05-16
申请人： Huawei Technologies Co., Ltd.
发明人： Guikai Peng , Huafeng Lin , Shiwei Nie , Xuming Wu , Liming Fang , Yinghua Dong
IPC分类号： H04L12/46 , H04J14/02 , H04B10/27 , H04B10/60
摘要： 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.

2. 发明授权

US08614939B2 Method and apparatus for crosstalk channel estimation 有权
公开(公告)号：US08614939B2
公开(公告)日：2013-12-24
申请号：US13648843
申请日：2012-10-10
申请人： Huawei Technologies Co., Ltd.
发明人： Raphael Cendrillon , Liming Fang
IPC分类号： H04J1/12
CPC分类号： H04B3/464 , H04B3/32 , H04B3/487 , H04L5/14 , H04L25/0204 , H04L25/0212 , H04M11/062
摘要： 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.

3. 发明授权

US10897311B2 Optical signal modulation circuit and apparatus 有权
公开(公告)号：US10897311B2
公开(公告)日：2021-01-19
申请号：US16452389
申请日：2019-06-25
申请人： HUAWEI TECHNOLOGIES CO., LTD.
发明人： Liqiang Yu , Liming Fang , Sulin Yang , Xiaofeng Zhang
IPC分类号： H04B10/04 , H04B10/50 , G02F1/015 , H01S5/00 , H04B10/564
摘要： 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.

4. 发明授权

US11063783B2 Passive optical network communication method, apparatus, and system 有权
公开(公告)号：US11063783B2
公开(公告)日：2021-07-13
申请号：US16413811
申请日：2019-05-16
申请人： Huawei Technologies Co., Ltd.
发明人： Guikai Peng , Huafeng Lin , Shiwei Nie , Xuming Wu , Liming Fang , Yinghua Dong
IPC分类号： H04J14/02 , H04L12/46 , H04B10/27 , H04B10/60 , H04Q11/00
摘要： 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.

5. 发明申请

US20180145767A1 Method and Apparatus for Despreading in Optical Domain 审中-公开
公开(公告)号：US20180145767A1
公开(公告)日：2018-05-24
申请号：US15857019
申请日：2017-12-28
申请人： Huawei Technologies Co., Ltd.
发明人： Liming Fang , Lei Zhou , Meng Sui , Xiaofeng Zhang
IPC分类号： H04B10/61 , H04B10/25
CPC分类号： H04B10/6162 , H04B10/2504 , H04B10/60 , H04J13/16
摘要： 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.

6. 发明授权

US09787357B2 Far-end crosstalk canceling method and device 有权
公开(公告)号：US09787357B2
公开(公告)日：2017-10-10
申请号：US14734745
申请日：2015-06-09
申请人： Huawei Technologies Co., Ltd.
发明人： Liming Fang
IPC分类号： H04B3/32 , H04B15/00 , H04J1/12 , H04L27/28 , H04B1/62 , H04L12/64
CPC分类号： H04B3/32 , H04B1/62 , H04J1/12 , H04L2012/6478
摘要： 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.

7. 发明申请

US20150214970A1 ANALOG TO DIGITAL CONVERTER 有权
标题翻译：模拟到数字转换器
公开(公告)号：US20150214970A1
公开(公告)日：2015-07-30
申请号：US14607282
申请日：2015-01-28
申请人： Huawei Technologies Co., Ltd.
发明人： Mingjun Fan , Liming Fang , Yuan Liu
IPC分类号： H03M1/12
CPC分类号： H03M1/12 , H03M1/00 , H03M1/0602 , H03M1/365 , H03M7/165
摘要： 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.
摘要翻译：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。

8. 发明授权

US10945068B2 Ultrasonic wave-based voice signal transmission system and method 有权
公开(公告)号：US10945068B2
公开(公告)日：2021-03-09
申请号：US16306768
申请日：2016-06-03
申请人： Huawei Technologies Co., Ltd.
发明人： Chaojun Deng , Liming Fang
IPC分类号： H04R1/40 , H04S7/00
摘要： An ultrasonic wave-based voice signal transmission system, where the system includes an ultrasonic modulator, a beamforming controller, an ultrasonic transducer array, and a user detector. The ultrasonic modulator is configured to modulate a voice signal onto an ultrasonic band and output the modulated voice signal to the beamforming controller. The user detector is configured to detect a user and output a detection result of the user to the beamforming controller. The beamforming controller is configured to control according to the detection result from the user detector, a phase and amplitude of the modulated voice signal to obtain an electrical signal pointing to the user, and output, to the ultrasonic transducer array, the electrical signal pointing to the user. Therefore, call convenience can be improved for the user.

9. 发明申请

US20190297416A1 Ultrasonic Wave-Based Voice Signal Transmission System and Method 审中-公开
公开(公告)号：US20190297416A1
公开(公告)日：2019-09-26
申请号：US16306768
申请日：2016-06-03
申请人： Huawei Technologies Co., Ltd.
发明人： Chaojun Deng , Liming Fang
IPC分类号： H04R1/40 , H04S7/00
摘要： An ultrasonic wave-based voice signal transmission system, where the system includes an ultrasonic modulator, a beamforming controller, an ultrasonic transducer array, and a user detector. The ultrasonic modulator is configured to modulate a voice signal onto an ultrasonic band and output the modulated voice signal to the beamforming controller. The user detector is configured to detect a user and output a detection result of the user to the beamforming controller. The beamforming controller is configured to control according to the detection result from the user detector, a phase and amplitude of the modulated voice signal to obtain an electrical signal pointing to the user, and output, to the ultrasonic transducer array, the electrical signal pointing to the user. Therefore, call convenience can be improved for the user.

10. 发明申请

US20190157832A1 WAVELENGTH SHIFT CONTROL METHOD AND SYSTEM 审中-公开
公开(公告)号：US20190157832A1
公开(公告)日：2019-05-23
申请号：US16252090
申请日：2019-01-18
申请人： HUAWEI TECHNOLOGIES CO., LTD.
发明人： Xuming Wu , Huafeng Lin , Liming Fang
IPC分类号： H01S3/13 , H01S3/10 , H04Q11/00
摘要： Embodiments of the present invention disclose a wavelength shift control method and system, to implement stable control over temperature of a laser to ensure that a transmit wavelength of the laser is stable in a burst work process of a transmitter and is not shifted to avoid impact on normal work of a PON system with a plurality of wavelength paths. The method includes: generating a burst control signal; sending the burst control signal to a controller; and controlling switch statuses of a laser and a heater according to the received burst control signal, where when a switch of the laser is in an on state, a switch of the heater is in an off state, and when a switch of the laser is in an off state, a switch of the heater is in an on state, so that a temperature of the laser remains stable.

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