公开(公告)号：US20160233993A1

公开(公告)日：2016-08-11

申请号：US15099938

申请日：2016-04-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： Qiang Zhang ,  Liangchuan Li

IPC: H04L5/00 ,  H04B1/00 ,  H04L27/26

CPC classification number: H04L5/0007 ,  H04B1/0007 ,  H04L25/03343 ,  H04L25/03821 ,  H04L27/2607 ,  H04L27/2626 ,  H04L27/265

Abstract: The present invention is applicable to the communications field and provides a processing method for an orthogonal frequency division multiplexing (OFDM) signal and a network device. The processing method includes: obtaining an orthogonal frequency division multiplexing OFDM signal; multiplying, in a digital domain, the obtained OFDM signal by a simple harmonic wave whose frequency is fs to obtain a frequency shifted signal; and outputting and loading the frequency shifted signal by using a digital-to-analog conversion (DAC) to a driver and a modulator to send the frequency shifted OFDM signal.

Abstract translation: 本发明适用于通信领域，并提供了正交频分复用（OFDM）信号和网络设备的处理方法。 所述处理方法包括：获得正交频分复用OFDM信号; 在数字域中，通过频率为fs的简谐波获得所获得的OFDM信号，以获得频移信号; 并通过使用数模转换（DAC）向驱动器和调制器输出和加载频移信号以发送频移OFDM信号。

公开(公告)号：US20130209098A1

公开(公告)日：2013-08-15

申请号：US13838288

申请日：2013-03-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yuanda Huang ,  Liangchuan Li ,  Ling Liu ,  Lei Liu

IPC: H04B10/60

CPC classification number: H04B10/60 ,  H04B10/6161 ,  H04B10/6164 ,  H04L27/2657 ,  H04L27/2697

Abstract: The present invention relates to a method and a device. The method includes: mixing a multi-carrier optical signal with a local optical signal having the same center frequency as that of the multi-carrier optical signal; performing photoelectric conversion and analog-to-digital conversion on an optical signal obtained through the mixing to obtain a digital signal; performing FFT on the digital signal to obtain a frequency domain signal; grouping the frequency domain signal according to each frequency band corresponding to its respective carrier in the multi-carrier optical signal, and performing IFFT on each frequency domain signal group to obtain a corresponding time domain signal for each carrier; and performing data restoration on each time domain signal corresponding to its respective carrier to obtain data carried on each carrier. The solutions of the present invention only require one set of coherent reception device, and have low cost and low power consumption.

Abstract translation: 本发明涉及一种方法和装置。 该方法包括：将多载波光信号与具有与多载波光信号相同中心频率的本地光信号混合; 对通过混合获得的光信号执行光电转换和模数转换，以获得数字信号; 对数字信号执行FFT以获得频域信号; 根据多载波光信号中与其相应载波相对应的每个频带对频域信号进行分组，并对每个频域信号组执行IFFT，以获得每个载波的相应时域信号; 并对与其各自的载波相对应的每个时域信号执行数据恢复，以获得每个载波上承载的数据。 本发明的解决方案仅需要一组相干接收装置，并且具有低成本和低功耗。

公开(公告)号：US20210367679A1

公开(公告)日：2021-11-25

申请号：US17397260

申请日：2021-08-09

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ping Zhao ,  Liangchuan Li ,  Tao Gui

IPC: H04B10/61 ,  H04B10/64

Abstract: A coherent optical receiving apparatus includes a polarization beam splitting unit, an optical frequency mixing unit, and a combining unit. The polarization beam splitting unit is configured to receive local oscillator light in any polarization state, and perform polarization state split on the received local oscillator light to obtain first polarized light in a linear polarization state. The optical frequency mixing unit is configured to perform frequency mixing on the first polarized light and second polarized light, and output mixed light to the combining unit. The second polarized light is polarized light in a linear polarization state obtained by splitting signal light. The combining unit is configured to combine every two paths of light output by the optical frequency mixing unit into one path for output.

公开(公告)号：US09906310B2

公开(公告)日：2018-02-27

申请号：US15338944

申请日：2016-10-31

Applicant: HUAWEI TECHNOLOGIES CO., LTD.

Inventor： Ling Liu ,  Liangchuan Li

IPC: H04B10/06 ,  H04B10/69 ,  H04J14/02 ,  H04J14/06 ,  H04L25/03

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.

公开(公告)号：US09537619B2

公开(公告)日：2017-01-03

申请号：US15099938

申请日：2016-04-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： Qiang Zhang ,  Liangchuan Li

IPC: H04L27/00 ,  H04L5/00 ,  H04L27/26 ,  H04B1/00 ,  H04L25/03

CPC classification number: H04L5/0007 ,  H04B1/0007 ,  H04L25/03343 ,  H04L25/03821 ,  H04L27/2607 ,  H04L27/2626 ,  H04L27/265

Abstract: The present invention is applicable to the communications field and provides a processing method for an orthogonal frequency division multiplexing (OFDM) signal and a network device. The processing method includes: obtaining an orthogonal frequency division multiplexing OFDM signal; multiplying, in a digital domain, the obtained OFDM signal by a simple harmonic wave whose frequency is fs to obtain a frequency shifted signal; and outputting and loading the frequency shifted signal by using a digital-to-analog conversion (DAC) to a driver and a modulator to send the frequency shifted OFDM signal.

Abstract translation: 本发明适用于通信领域，并提供了正交频分复用（OFDM）信号和网络设备的处理方法。 所述处理方法包括：获得正交频分复用OFDM信号; 在数字域中，通过频率为fs的简谐波获得所获得的OFDM信号，以获得频移信号; 并通过使用数模转换（DAC）向驱动器和调制器输出和加载频移信号以发送频移OFDM信号。

公开(公告)号：US20160204961A1

公开(公告)日：2016-07-14

申请号：US15078717

申请日：2016-03-23

Applicant: Huawei Technologies Co., Ltd.

Inventor： Liangchuan Li ,  Ling Liu

IPC: H04L25/03

CPC classification number: H04L25/03012 ,  H04L25/03254 ,  H04L25/03261 ,  H04L25/03834

Abstract: A method for sending and receiving a signal is disclosed, and a corresponding device and system. The method includes performing constellation mapping on a data stream to obtain a mapped signal, and performing pre-filtering on the mapped signal to convert the mapped signal into a narrowband signal filtered signal. The pre-filtering is finite impulse response filtering. A bandwidth of the narrowband signal filtered signal is less than bandwidth of the mapped signal, and the narrowband signal filtered signal is a baud rate signal. The method also includes performing waveform forming according to the narrowband signal filtered signal to obtain a shaped signal, and performing digital-to-analog conversion on the shaped signal to convert a shaped second signal into an analog signal, and sending the analog signal.

Abstract translation: 公开了一种用于发送和接收信号的方法，以及相应的设备和系统。 该方法包括在数据流上执行星座映射以获得映射的信号，以及对所映射的信号执行预滤波以将映射的信号转换成窄带信号滤波的信号。 预滤波是有限脉冲响应滤波。 窄带信号滤波信号的带宽小于映射信号的带宽，窄带信号滤波信号是波特率信号。 该方法还包括根据窄带信号滤波信号执行波形形成以获得整形信号，并对成形信号执行数模转换，将形状的第二信号转换为模拟信号，并发送模拟信号。

公开(公告)号：US09379820B2

公开(公告)日：2016-06-28

申请号：US13838288

申请日：2013-03-15

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yuanda Huang ,  Liangchuan Li ,  Ling Liu ,  Lei Liu

IPC: H04B10/06 ,  H04J14/00 ,  H04J14/02 ,  H04B10/60 ,  H04B10/61 ,  H04L27/26

CPC classification number: H04B10/60 ,  H04B10/6161 ,  H04B10/6164 ,  H04L27/2657 ,  H04L27/2697

Abstract: The present invention relates to a method and a device. The method includes: mixing a multi-carrier optical signal with a local optical signal having the same center frequency as that of the multi-carrier optical signal; performing photoelectric conversion and analog-to-digital conversion on an optical signal obtained through the mixing to obtain a digital signal; performing FFT on the digital signal to obtain a frequency domain signal; grouping the frequency domain signal according to each frequency band corresponding to its respective carrier in the multi-carrier optical signal, and performing IFFT on each frequency domain signal group to obtain a corresponding time domain signal for each carrier; and performing data restoration on each time domain signal corresponding to its respective carrier to obtain data carried on each carrier. The solutions of the present invention only require one set of coherent reception device, and have low cost and low power consumption.

Abstract translation: 本发明涉及一种方法和装置。 该方法包括：将多载波光信号与具有与多载波光信号相同中心频率的本地光信号混合; 对通过混合获得的光信号执行光电转换和模数转换，以获得数字信号; 对数字信号执行FFT以获得频域信号; 根据多载波光信号中与其相应载波相对应的每个频带对频域信号进行分组，并对每个频域信号组执行IFFT，以获得每个载波的相应时域信号; 并对与其各自的载波相对应的每个时域信号执行数据恢复，以获得每个载波上承载的数据。 本发明的解决方案仅需要一组相干接收装置，并且具有低成本和低功耗。

公开(公告)号：US20160050087A1

公开(公告)日：2016-02-18

申请号：US14922861

申请日：2015-10-26

Applicant: Huawei Technologies Co., Ltd.

Inventor： Yuanyuan Fang ,  Liangchuan Li

IPC: H04L25/03

CPC classification number: H04L25/0391 ,  H04L5/0048 ,  H04L25/0256 ,  H04L25/03006

Abstract: Embodiments of the present invention provide a channel equalization method and apparatus, and a receiver. The method includes: acquiring a channel transfer matrix according to a training sequence sent by a transmit end; acquiring an amplitude response matrix of the channel transfer matrix, and acquiring, according to the amplitude response matrix, a window length of a sliding window that is required for performing noise filtering on the channel transfer matrix; and performing noise filtering on the channel transfer matrix according to the window length of the sliding window, and performing, according to a channel transfer matrix that is obtained by means of noise filtering, channel equalization on a data payload sent by the transmit end. The channel equalization method and apparatus, and a receiver provided in the embodiments of the present invention may implement adaptive channel equalization.

Abstract translation: 本发明的实施例提供一种信道均衡方法和装置以及接收机。 该方法包括：根据由发送端发送的训练序列获取信道传送矩阵; 获取所述信道传输矩阵的幅度响应矩阵，并且根据所述幅度响应矩阵，获取所述信道传输矩阵上执行噪声滤波所需的滑动窗口的窗口长度; 以及根据所述滑动窗口的窗口长度对所述信道传送矩阵执行噪声滤波，并且根据通过噪声滤波获得的信道传输矩阵对由所述发送端发送的数据有效载荷进行信道均衡。 在本发明的实施例中提供的信道均衡方法和装置以及接收机可以实现自适应信道均衡。

公开(公告)号：US09094131B2

公开(公告)日：2015-07-28

申请号：US13718800

申请日：2012-12-18

Applicant: Huawei Technologies Co., Ltd.

Inventor： Lei Liu ,  Liangchuan Li ,  Bangning Mao ,  Li Zeng

IPC: H04B10/556 ,  H04B10/54 ,  H04L27/20 ,  H04B10/50

CPC classification number: H04B10/5561 ,  H04B10/5053 ,  H04B10/541 ,  H04L27/2096

Abstract: A signal generating method and apparatus in the field of signal technologies are provided. The method includes: adjusting an incident angle of an optical signal entering a polarization beam splitter, so that the polarization beam splitter outputs a first optical signal and a second optical signal that have a preset power ratio; performing QPSK modulation on the first and second optical signal respectively by using a first and second externally input data streams, to obtain a first and a second QPSK optical signal; before the first QPSK optical signal and the second QPSK optical signal are input into a polarization beam combiner, adjusting a polarization state of the first or the second QPSK optical signal; when the polarization states of the two QPSK optical signals are the same, outputting a 16QAM signal; and when the polarization states of the two QPSK optical signals are orthogonal, outputting a DP-QPSK signal.

Abstract translation: 提供了信号技术领域的信号产生方法和装置。 该方法包括：调整进入偏振分束器的光信号的入射角，使得偏振分束器输出具有预设功率比的第一光信号和第二光信号; 通过使用第一和第二外部输入数据流分别对第一和第二光信号执行QPSK调制，以获得第一和第二QPSK光信号; 在将第一QPSK光信号和第二QPSK光信号输入到偏振光束组合器之前，调整第一或第二QPSK光信号的偏振状态; 当两个QPSK光信号的极化状态相同时，输出16QAM信号; 并且当两个QPSK光信号的偏振态正交时，输出DP-QPSK信号。

公开(公告)号：US08861981B2

公开(公告)日：2014-10-14

申请号：US13845575

申请日：2013-03-18

Applicant: Huawei Technologies Co., Ltd.

Inventor： Ling Liu ,  Liangchuan Li

IPC: H04B10/06 ,  H04B10/2513 ,  H04B10/2543 ,  H04B10/61

CPC classification number: H04B10/6163 ,  H04B10/25133 ,  H04B10/2543 ,  H04B10/6161

Abstract: Embodiments of the present invention disclose an optical signal compensation device, where, a nonlinear compensation module in the optical signal compensation device adopts a new nonlinear compensation algorithm to perform nonlinear compensation on an optical signal, and during the process of performing the nonlinear compensation, it is no longer required to look up a table. Technical solutions provided in the embodiments of the present invention can effectively increase the processing speed of the nonlinear compensation, thereby reducing the overall processing delay of an optical signal compensation system.

Abstract translation: 本发明的实施例公开了一种光信号补偿装置，其中，光信号补偿装置中的非线性补偿模块采用新的非线性补偿算法对光信号执行非线性补偿，并且在执行非线性补偿的过程中 不再需要查找一张桌子。 在本发明的实施例中提供的技术方案可以有效地提高非线性补偿的处理速度，从而减少光信号补偿系统的整体处理延迟。