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公开(公告)号：US20220321232A1
公开(公告)日：2022-10-06
申请号：US17843335
申请日：2022-06-17
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Jilong HAN , Liangchuan LI
Abstract: Embodiments of the present disclosure provide example frequency domain equalization methods, example equalizers, example optical receivers, and example systems. One example method includes obtaining, by an optical receiver, a first complex signal. The first complex signal is a first time domain signal. The first complex signal is obtained based on two channels of mutually independent digital electrical signals. The optical receiver converts the first complex signal into a frequency domain signal, and multiplies the first complex signal in frequency domain by a tap coefficient to obtain a second complex signal. The tap coefficient is used to implement signal compensation for the first complex signal in frequency domain. The optical receiver converts the second complex signal into a second time domain signal, divides the second time domain signal into two channels of real signals, and outputs the two channels of the real signals.
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公开(公告)号：US20170048004A1
公开(公告)日：2017-02-16
申请号：US15338944
申请日：2016-10-31
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Ling LIU , Liangchuan LI
CPC classification number: H04B10/6972 , H04J14/02 , H04J14/06 , H04L25/03299 , H04L25/03993
Abstract: Embodiments of the present invention provide a signal receiving method and a receiver. The signal receiving method includes: sequentially preprocessing a received first signal to obtain to-be-processed second signals; generating filtering coefficients for the second signals by converting colored noise of the second signals into white noise; and filtering the corresponding second signals according to the filtering coefficients. Filtering can be performed according to different channel conditions and transmission requirements, thereby improving system performance of the receiver.
Abstract translation: 本发明的实施例提供了一种信号接收方法和接收机。 信号接收方法包括：对接收到的第一信号进行顺序预处理以获得待处理的第二信号; 通过将所述第二信号的有色噪声转换成白噪声来产生所述第二信号的滤波系数; 并根据滤波系数对相应的第二信号进行滤波。 可以根据不同的信道条件和传输要求进行滤波，从而提高接收机的系统性能。
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公开(公告)号：US20180278448A1
公开(公告)日：2018-09-27
申请号：US15991912
申请日：2018-05-29
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Ling LIU , Zhiyu XIAO , Liangchuan LI
CPC classification number: H04L27/01 , H03M13/03 , H03M13/2957 , H04L1/0041 , H04L1/0045 , H04L25/03273 , H04L25/03286 , H04L25/067
Abstract: A signal processing system and method, and an apparatus are provided. A phase recovery apparatus may be used to: receive a feedback signal fed back by an information iteration apparatus, perform, based on the feedback signal, phase recovery on a signal output by an equalizer, and output a phase-recovered signal to a post filtering apparatus, so that the post filtering apparatus performs noise filtering on the phase-recovered signal, and outputs a noise-filtered signal to the information iteration apparatus. To be specific, the phase recovery may be performed, based on the signal fed back by the information iteration apparatus, on the signal output by the equalizer. Because output of the information iteration apparatus is more accurate in determining the signal, precision of the phase recovery can be improved, cycle skipping is reduced, and input signal quality of the post filtering apparatus is improved.
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公开(公告)号：US20230198620A1
公开(公告)日：2023-06-22
申请号：US18170623
申请日：2023-02-17
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Yanzhao LU , Tao GUI , Liangchuan LI
IPC: H04B10/25 , H04B10/112
CPC classification number: H04B10/25 , H04B10/1127
Abstract: An optical transceiver apparatus and an optical signal processing method. The optical transceiver apparatus may include a light source, an optical signal processor, and an optical path selector. The light source is separately connected to the optical signal processor and the optical path selector, and the optical signal processor is connected to the optical path selector. The light source is configured to provide a first local oscillator optical signal and a first carrier optical signal. The optical signal processor is configured to modulate the first carrier optical signal and output a first modulated optical signal. The optical path selector is configured to transmit the first local oscillator optical signal and the first modulated optical signal to the optical signal processor or a transmission fiber. Herein, the transmission fiber is configured to transmit an optical signal to an outside of the optical transceiver apparatus.
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公开(公告)号：US20200014418A1
公开(公告)日：2020-01-09
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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Patent Agency Ranking
公开(公告)号：US20190296848A1
公开(公告)日：2019-09-26
申请号：US16435548
申请日：2019-06-09
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Xie WANG , Yuanda HUANG , Liangchuan LI
IPC: H04J14/00 , H04B10/2507
Abstract: Embodiments of this application provide a data transmission method, a terminal device, and a network side device. Encoding, by a terminal device, a first identifier by using a first code word which is selected from at least one code word by the terminal device; sending, by the terminal device, the encoded first identifier to a network side device; receiving, by the terminal device, a second identifier sent by the network side device; decoding, by the terminal device, the second identifier by using the first code word; when the decoded second identifier is the same as the first identifier, encoding, by the terminal device, subsequent data by using the first code word; and sending, by the terminal device, the encoded subsequent data to the network side device.
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公开(公告)号：US20180006740A1
公开(公告)日：2018-01-04
申请号：US15709056
申请日：2017-09-19
Applicant: Huawei Technologies Co., Ltd.
Inventor： Yuanda HUANG , Liangchuan LI
CPC classification number: H04B17/21 , H04B10/0795 , H04B10/503 , H04B10/572 , H04B10/61 , H04B17/11 , 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：US20210234614A1
公开(公告)日：2021-07-29
申请号：US17229005
申请日：2021-04-13
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Ping ZHAO , Liangchuan LI , Xinhua XIAO
Abstract: Embodiments of the present invention provide an optical transceiver including an optical interface, an optical receiver, and a polarization-maintaining optical waveguide, where the optical receiver includes a mixer, an optical-to-electrical converter, and a digital signal processor. The optical interface is configured to receive first local oscillator light from a first laser outside the transceiver; the mixer is configured to receive the first local oscillator light and receive first signal light modulated on laser light; the polarization-maintaining optical waveguide is configured to connect the optical interface and the optical receiver, where a polarization state of the first local oscillator light remains unchanged when being transmitted in the polarization-maintaining optical waveguide; the optical-to-electrical converter and an analog-to-digital converter are configured to perform optical-to-electrical conversion and analog-to-digital conversion on the mixed light to obtain a digital signal; and the digital signal processor is configured to process the digital signal to obtain data.
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公开(公告)号：US20190342008A1
公开(公告)日：2019-11-07
申请号：US16517214
申请日：2019-07-19
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Yuanda HUANG , Liangchuan LI
IPC: H04B10/516 , H04B10/54 , H04B10/69 , H04B7/216 , H04L27/36 , H04L27/34 , H04J14/00 , H04B1/7087 , H04B10/50 , H04B10/2507
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：US20190253177A1
公开(公告)日：2019-08-15
申请号：US16398169
申请日：2019-04-29
Applicant: HUAWEI TECHNOLOGIES CO., LTD.
Inventor： Xie WANG , Yuanda HUANG , Liangchuan LI
IPC: H04J14/06 , H04B10/2569 , H04B7/10 , H04J14/02
CPC classification number: H04J14/06 , H04B7/10 , H04B10/2507 , H04B10/2569 , H04J14/0238 , H04J14/0282
Abstract: Embodiments of the present invention provide a receiver and a data receiving method. The receiver includes: two first input ends, configured to receive a digital signal of an X-polarization state and a digital signal of a Y-polarization state; a despreading module, configured to despread the digital signal of the X-polarization state and the digital signal of the Y-polarization state based on N delay values and spreading codes of N transmitters, to obtain N first baseband signals and N second baseband signals; and a multiple-input multiple-output equalization module, configured to perform equalization filtering processing on the N first baseband signals and the N second baseband signals, to obtain recovered data of the first polarization states and recovered data of the second polarization states of the N transmitters. In the embodiments of the present invention, the coherent CDMA multipoint-to-point data transmission in an optical communications system is implemented.
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