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公开(公告)号：US11870500B2
公开(公告)日：2024-01-09
申请号：US17645188
申请日：2021-12-20
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yanzhao Lu , Yuanda Huang
CPC classification number: H04B10/6971 , H04L1/0045
Abstract: An optical receiver obtains a to-be-processed signal block; the optical receiver determines a prediction signal block corresponding to the to-be-processed signal block; the optical receiver determines a noise compensation coefficient of the to-be-processed signal block based on the to-be-processed signal block and the prediction signal block; and the optical receiver performs noise compensation on the to-be-processed signal block based on the noise compensation coefficient.
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公开(公告)号：US10911093B2
公开(公告)日：2021-02-02
申请号：US16564022
申请日：2019-09-09
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Yi Yu , Yuanda Huang , Liangchuan Li
Abstract: Embodiments described and shown provide a signal transmission method, a signal receiving method, a related device, and a system. The signal transmission method includes: generating a single-wavelength optical carrier; splitting the single-wavelength optical carrier into N subcarriers having a same wavelength; generating a spreading code corresponding to each of the subcarriers to obtain N spreading codes, where a bandwidth of each of the spreading codes is less than or equal to a preset threshold; deserializing a to-be-transmitted data signal into N sub-data signals; modulating the N subcarriers based on the N sub-data signals and the N spreading codes, to obtain N modulation signals; and combining the N modulation signals into one combined signal, and outputting the combined signal.
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公开(公告)号：US20230388017A1
公开(公告)日：2023-11-30
申请号：US18446611
申请日：2023-08-09
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Yuanda Huang , Xin Zhang , Tianhai Chang
IPC: H04B10/291 , G02B6/28
CPC classification number: H04B10/291 , G02B6/2804
Abstract: An optical coupler, a communication method, and a communication system are provided. The communication system includes N transmitters, M receivers, and an optical coupler, where both N and M are positive integers greater than 1. Each of the N transmitters is configured to send one first optical signal to the optical coupler. The optical coupler is configured to couple N first optical signals sent by the N transmitters into one second optical signal and to broadcast the second optical signal to the M receivers. Each of the M receivers is configured to receive the second optical signal sent by the optical coupler and to demodulate the second optical signal.
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公开(公告)号：US20220140915A1
公开(公告)日：2022-05-05
申请号：US17645188
申请日：2021-12-20
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yanzhao Lu , Yuanda Huang
Abstract: An optical receiver obtains a to-be-processed signal block; the optical receiver determines a prediction signal block corresponding to the to-be-processed signal block; the optical receiver determines a noise compensation coefficient of the to-be-processed signal block based on the to-be-processed signal block and the prediction signal block; and the optical receiver performs noise compensation on the to-be-processed signal block based on the noise compensation coefficient.
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公开(公告)号：US20180123725A1
公开(公告)日：2018-05-03
申请号：US15852940
申请日：2017-12-22
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yuanda Huang
IPC: H04J14/06 , H04B10/2507 , H04L7/00
CPC classification number: H04J14/06 , H04B10/2507 , H04B10/6165 , H04B10/6166 , H04L7/0075
Abstract: A phase estimation method and apparatus for a polarization multiplexing system, where the method includes performing, by a receive end, state of polarization (SOP) rotation on a received first SOP signal and second SOP signal according to an angle of previous SOP rotation, extracting a pilot using adaptive filtering, and performing carrier phase estimation according to the extracted pilot. This prevents a noise signal from being extracted and can make a carrier phase estimation result more accurate.
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Patent Agency Ranking
公开(公告)号：US11018775B2
公开(公告)日：2021-05-25
申请号：US16791381
申请日：2020-02-14
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Yi Yu , Yuanda Huang , Liangchuan Li , Xie Wang
IPC: H04B10/556 , H04B1/707 , H04B10/61 , H04J14/00 , H04B10/516 , H04B10/50
Abstract: An optical transmitter, an optical receiver, and an optical transmission method are disclosed. The optical transmitter includes an optical signal generator, N spreaders, N pairs of data modulators, and a combiner, where the optical signal generator generates N optical carriers; an ith spreader spreads an ith optical carrier, to obtain a spread optical signal having two subcarriers; splits the spread optical signal into a first optical signal and a second optical signal; and delays the second optical signal to obtain a third optical signal; an ith pair of data modulators modulate the first optical signal and the third optical signal to obtain a pair of modulated optical signals, transmit the pair of modulated optical signals to the combiner, where the pair of modulated optical signals reaching the combiner differ by 1/(4 fsi) in time domain; and the combiner combines, into one optical signal, N pairs of modulated optical signals.
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公开(公告)号：US10958352B2
公开(公告)日：2021-03-23
申请号：US16517214
申请日：2019-07-19
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Yuanda Huang , Liangchuan Li
IPC: H04B10/516 , H04B7/216 , H04B10/69 , H04B10/50 , H04L27/34 , H04B10/54 , H04J14/00 , H04B1/7087 , H04B10/2507 , H04L27/36 , H04B10/2569
Abstract: According to a signal transmitting method, a signal receiving method, and a related device and system, a generated single-wavelength optical carrier may be split into N subcarriers with a same wavelength by using a splitting device, corresponding data modulation and corresponding amplitude spread spectrum modulation are performed on the N subcarriers by using N spreading codes and N low-speed data signals obtained by deserializing a received high-speed data signal, to obtain N spread spectrum modulation signals, and the N spread spectrum modulation signals are combined and output. A multicarrier generation apparatus or the like having a relatively complex structure does not need to be used for optical carrier splitting, and spectrum spreading does not need to be performed in a phase modulation manner in which a plurality of delay units or controllable phase units are required.
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公开(公告)号：US10116400B2
公开(公告)日：2018-10-30
申请号：US15709056
申请日：2017-09-19
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yuanda Huang , Liangchuan Li
IPC: H04B10/572 , H04B17/21 , H04B10/079 , H04B10/61 , H04B17/11 , H04B10/50 , H04J14/02
Abstract: The present invention discloses an optical signal frequency calibration method and device. The method includes: receiving a first optical signal that experiences a frequency offset and that is generated by a laser in a transmitter of an access node; receiving a reference optical signal sent by a local oscillator; calculating a difference between a specified frequency difference and a frequency difference between the reference optical signal and the first optical signal; and performing frequency calibration on the first optical signal according to the difference, modulating to-be-sent uplink data by using the calibrated first optical signal, and sending the modulated uplink data to a primary node.
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公开(公告)号：US09762427B2
公开(公告)日：2017-09-12
申请号：US15295684
申请日：2016-10-17
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yuanda Huang
CPC classification number: H04L27/361 , H04L7/0037 , H04L27/3411 , H04L27/3455 , H04L27/38
Abstract: The present invention relates to the field of signal processing, and discloses code modulation and demodulation methods, apparatuses, and a system, so as to reduce an envelope fluctuation degree of a signal and improve system performance. A specific implementation method includes: receiving, by a sending apparatus, N channels of bit signals, and performing serial-to-parallel conversion on any channel of bit signal of the N channels of bit signals, to generate two channels of first bit signals; performing delay control on the two channels of first bit signals, to generate two channels of code bit signals; performing QAM mapping on the two channels of code bit signals and other N−1 channels of bit signals, to generate a channel of quadrature electrical signal and a channel of in-phase electrical signal; modulating the quadrature electrical signal and the in-phase electrical signal, to obtain a transmit signal.
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公开(公告)号：US20240097809A1
公开(公告)日：2024-03-21
申请号：US18513915
申请日：2023-11-20
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yuanda Huang , Kuo Zhang
IPC: H04J3/06
CPC classification number: H04J3/0623 , H04J3/0641
Abstract: In a method, a network device receives a combined optical signal, where the combined optical signal is obtained by coupling optical signals sent by a plurality of communication nodes. If the network device is not a master node, the network device detects whether a master label exists in the combined optical signal, where the master label indicates the master node. If it is detected that a first master label exists in the combined optical signal, where the first master label indicates a first master node, the network device synchronizes a local clock frequency with a clock frequency of the first master node.
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