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公开(公告)号：US10945068B2
公开(公告)日：2021-03-09
申请号：US16306768
申请日：2016-06-03
Applicant: Huawei Technologies Co., Ltd.
Inventor： Chaojun Deng , Liming Fang
Abstract: 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.
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公开(公告)号：US20190297416A1
公开(公告)日：2019-09-26
申请号：US16306768
申请日：2016-06-03
Applicant: Huawei Technologies Co., Ltd.
Inventor： Chaojun Deng , Liming Fang
Abstract: 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.
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Patent Agency Ranking
公开(公告)号：US20190157832A1
公开(公告)日：2019-05-23
申请号：US16252090
申请日：2019-01-18
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Xuming Wu , Huafeng Lin , Liming Fang
Abstract: 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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公开(公告)号：US10171175B2
公开(公告)日：2019-01-01
申请号：US15857019
申请日：2017-12-28
Applicant: Huawei Technologies Co., Ltd.
Inventor： Liming Fang , Lei Zhou , Meng Sui , Xiaofeng Zhang
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：US09106248B1
公开(公告)日：2015-08-11
申请号：US14607282
申请日：2015-01-28
Applicant: Huawei Technologies Co., Ltd.
Inventor： Mingjun Fan , Liming Fang , Yuan Liu
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：US09071334B2
公开(公告)日：2015-06-30
申请号：US14311868
申请日：2014-06-23
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 an xDSL system is provided. The method includes transmitting, by a first DSL transceiver over a first line to a second DSL transceiver, a noise statistic related value that reflects a signal-to-noise ratio of the first line and receiving, by the first DSL transceiver over the first line from the second DSL transceiver, a synthesized signal pre-coded on the second DSL transceiver using filtering parameters associated with the noise statistic related value. The method further includes transmitting, by the first DSL transceiver over the first line to the second DSL transceiver in response to the reception of the synthesized signal, an updated noise statistic related value. A corresponding device for remote crosstalk cancellation is also provided.
Abstract translation: 提供了一种减少xDSL系统中远端串扰的方法。 该方法包括通过第一线路将第一DSL收发器发送到第二DSL收发器，噪声统计相关值反映第一线路的信噪比并由第一DSL收发器在第一线路上接收 从第二DSL收发器，使用与噪声统计相关值相关联的滤波参数在第二DSL收发器上预编码的合成信号。 该方法还包括响应于合成信号的接收，由第一DSL收发器通过第一线路向第二DSL收发器发送更新的噪声统计相关值。 还提供了用于远程串扰消除的相应设备。
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公开(公告)号：US08576691B2
公开(公告)日：2013-11-05
申请号：US13719761
申请日：2012-12-19
Applicant: Huawei Technologies Co., Ltd.
Inventor： Liming Fang , Raphael Cendrillon
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.
Abstract translation: 一种基于负载线的测量信噪比（SNR）的串扰信道估计的方法和装置。 用于信道估计的方法包括：在新添加的线路K上加载在线路1至K-1上发送的K-1信号的组合; 获得加载了在线路1至K-1上发送的K-1信号的组合的线路K的测量SNR; 以及根据在线路1至K-1发送的K-1信号的K-1系数和所测量的SNR来计算线路K的串扰信道。 本发明的实施例可以用于诸如xDSL系统的相关网络通信系统。
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