WO2023061213A1 - Optical signal skew extraction method and apparatus, electronic device, and storage medium - Google Patents

Optical signal skew extraction method and apparatus, electronic device, and storage medium Download PDF

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WO2023061213A1
WO2023061213A1 PCT/CN2022/121778 CN2022121778W WO2023061213A1 WO 2023061213 A1 WO2023061213 A1 WO 2023061213A1 CN 2022121778 W CN2022121778 W CN 2022121778W WO 2023061213 A1 WO2023061213 A1 WO 2023061213A1
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channel
compensation
adaptive
way
optical signal
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PCT/CN2022/121778
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French (fr)
Chinese (zh)
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梁俊鹏
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中兴通讯股份有限公司
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
    • H04B10/07—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems
    • H04B10/075—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal
    • H04B10/079—Arrangements for monitoring or testing transmission systems; Arrangements for fault measurement of transmission systems using an in-service signal using measurements of the data signal

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  • the embodiments of the present application relate to the field of optical communications, and in particular, to a method, device, electronic device, and storage medium for extracting optical signal damage.
  • the front end of a coherent transceiver usually suffers from amplitude imbalance, phase imbalance, and IQ (in-phase component and quadrature component) impairments (skew), etc.
  • the amplitude imbalance and phase imbalance can be compensated and monitored by the Gram-Schmidt Orthogonalization Procedure (Gram-Schmidt Orthogonalization Procedure, referred to as "GSOP").
  • Gram-Schmidt Orthogonalization Procedure referred to as "GSOP"
  • GSOP Gram-Schmidt Orthogonalization Procedure
  • interpolation is mainly used to compensate, but due to temperature changes, device aging and other reasons, the value of IQ skew changes slowly, and the static interpolation filter cannot adaptively compensate for IQ skew.
  • some equalization methods for adaptively compensating for skew have emerged, including using a generalized linear equalizer for adaptively compensating for skew.
  • the main purpose of the embodiments of the present application is to provide a method, device, electronic device and storage medium for extracting optical signal impairments, so as to realize adaptive compensation for skew and extract skew values.
  • the embodiment of the present application provides a method for extracting optical signal damage, including the following steps: obtaining the sampling data of the I channel and the Q channel after the received light is mixed; Compensation at the receiving end; wherein, the adaptive compensation includes adaptive receiving end compensation, and/or adaptive transmitting end compensation; obtaining the converged receiving equalization tap coefficients obtained by the adaptive receiving end compensation; obtaining according to each receiving equalizing tap coefficient Impairments at the receiving end of the I-path and the Q-path; where the impairments include impairments at the receiving end corresponding to adaptive compensation, and/or impairments at the transmitting end.
  • the embodiment of the present application also provides an optical signal damage extraction device, including: an analog-to-digital converter, used to obtain the sampling data of the I channel and the Q channel after the received light is mixed; a generalized linear equalizer, used Adaptive compensation is performed on the sampling data of the I channel and the Q channel; wherein, the adaptive compensation includes adaptive receiver compensation, and/or, adaptive transmitter compensation; the damage extraction module is used to obtain the convergence obtained by the adaptive compensation After each equalization tap coefficient, the impairments of the I path and the Q path are obtained according to each equalization tap coefficient; wherein, the impairment includes an impairment at the receiving end corresponding to the adaptive compensation, and/or an impairment at the transmitting end.
  • an analog-to-digital converter used to obtain the sampling data of the I channel and the Q channel after the received light is mixed
  • a generalized linear equalizer used Adaptive compensation is performed on the sampling data of the I channel and the Q channel
  • the adaptive compensation includes adaptive receiver compensation, and/or, adaptive transmitter compensation
  • the damage extraction module is used to obtain the convergence
  • an embodiment of the present application also provides an electronic device, including: at least one processor; a memory connected to the at least one processor in communication; the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by at least one processor Executed by a processor, so that at least one processor can execute the above optical signal impairment extraction method.
  • an embodiment of the present application further provides a computer-readable storage medium storing a computer program, and implementing the above optical signal damage extraction method when the computer program is executed by a processor.
  • FIG. 1 is a schematic flowchart of a method for extracting optical signal damage according to an embodiment of the present application
  • FIG. 2 is a schematic structural diagram of a generalized linear equalizer provided according to an embodiment of the present application
  • Fig. 3 is a schematic structural diagram of an optical signal damage extraction device provided according to an embodiment of the present application.
  • Fig. 4 is a schematic structural diagram of an electronic device provided according to an embodiment of the present application.
  • the embodiment of the present application relates to a method for extracting optical signal damage. As shown in FIG. 1 , the method specifically includes the following steps.
  • Step 101 acquire the sampling data of the I channel and the Q channel after the received light is mixed.
  • Step 102 performing adaptive compensation on the sampling data of the I channel and the Q channel; wherein, the adaptive compensation includes adaptive receiver compensation, and/or adaptive transmitter compensation.
  • Step 103 acquiring the converged equalization tap coefficients obtained by adaptive compensation.
  • Step 104 Acquire the impairments of the I-path and the Q-path according to each equalization tap coefficient; wherein, the impairments include impairments at the receiving end corresponding to adaptive compensation, and/or impairments at the transmitting end.
  • the optical signal impairment extraction method of this embodiment is applied to an optical signal impairment extraction device of a coherent optical communication system.
  • a digital signal processing (Digital Signal Processing, referred to as "DSP") processing device composed of an end damage extraction module, it is used in conjunction with a coherent transceiver. Compensate and extract the IQ impairment existing in the front end of the coherent transceiver, so as to monitor the IQ impairment subsequently.
  • the optical signal damage extraction method of this embodiment can be used in the factory stage to calibrate the optical transceiver module skew damage calibration technology in the form of software or hardware, or as a monitoring module in the live network. Monitor the skew damage caused by module aging and temperature drift in the network, and report it to the network management unit to facilitate fault diagnosis and positioning. It can also integrate the entire set of DSP as a batch of modules for on-site diagnosis or factory stage test instrument.
  • a complete coherent optical communication system includes a transmitting end, a receiving end and an optical fiber channel.
  • the modulator modulates the data onto the optical carrier, through the transmission of the optical fiber channel, coherently detects it at the receiving end, uses the local light to mix with the received signal light (that is, the received light), and is sampled by the ADC , the signal becomes a discrete digital signal, digital signal processing is performed, and the signal is restored to obtain the transmitted data.
  • the equalization method based on 4x4MIMO and 4x2MIMO equalizer to compensate the skew of the receiving end can realize the extraction of skew at the receiving end, but the equalization method based on the generalized linear equalizer to compensate for the skew of the receiving end is not as intuitive as 4x4MIMO and 4x2MIMO, and it is difficult to realize the use of generalized linear equalizer.
  • the linear equalizer extracts the receiver skew.
  • the tap coefficient obtains the damage of the I channel and the Q channel, and after adaptively compensating the skew, the impairment of the I channel and the Q channel can be extracted, that is, the skew value of the I channel and the Q channel.
  • the damage of the extracted I road and Q road is the receiving end damage corresponding to the adaptive compensation, and/or, the transmitting end damage, realizes the receiving end of I road and Q road Impairment at the transmitting end, or at the transmitting end, or at the receiving end and at the transmitting end.
  • the DSP processing device acquires the sampling data of the I channel and the Q channel after the received light is mixed.
  • the sampling data of the I channel and the Q channel are double sampling data outputted through an analog-to-digital converter (ADC).
  • ADC analog-to-digital converter
  • the received light needs to be mixed by a 90-degree mixer to obtain the I-channel signal and the Q-channel signal of the received light, so that the sampling data of the two-channel signals can be obtained after being sampled by the ADC.
  • the DSP processing device performs adaptive compensation on the sampling data of the I channel and the Q channel.
  • the adaptive compensation includes adaptive receiver compensation, and/or adaptive transmitter compensation.
  • the generalized linear equalizer takes the two-way complex signals to obtain the conjugate, and then uses the complex signal and its conjugate items as the input of the 4x2MIMO equalizer, thereby Compensate for damage.
  • the generalized linear equalizer can be obtained by the first-order modification of the Volterra backward inverse equalizer, which can compensate the linear damage and IQ imbalance of the signal, that is, the IQ damage.
  • step 103 the DSP processing device acquires the converged equalization tap coefficients obtained by adaptive compensation.
  • each equalization tap coefficient includes: h xx , h xy , h yx , h yy , h xx* , h xy* , h yx* and h yy* , which are obtained according to the iterative results of the following formula :
  • x(k) and y(k) are the input signal sequence
  • x * (k) and y * (k) are the conjugate terms of x(k) and y(k) respectively
  • 0 ⁇ 1 is The iterative step size
  • e x and e y are error criteria, and its calculation can be selected according to different modulation formats and algorithm architectures.
  • the CMA algorithm can be selected for transverse mode modulation formats such as PDM-nPSK, and its error function can be expressed as :
  • RDE radial decision algorithm
  • R x (k) and R y (k) are the decision radius of the RDE algorithm.
  • common algorithms such as DD-LMS (decision-guided least mean square) can also use coefficient upgrade iterations, and the main difference lies in the selection of error criteria.
  • step 104 the DSP processing device acquires impairments of the I-way and the Q-way according to each equalization tap coefficient.
  • the impairments of the I-way and the Q-way are obtained according to the equalization tap coefficients, specifically: performing Fourier transform on each equalization tap coefficient, and calculating the argument angles of the I-way and Q-way respectively according to the Fourier transform results, for
  • the I-way and Q-way arguments are frequency derived to obtain the I-way and Q-way damage.
  • the DSP processing device first performs Fourier transform on the converged equalization tap coefficients to obtain:
  • ⁇ is the angular frequency, calculated by the following formula:
  • Ntap is the number of taps
  • RB is the baud rate of the signal
  • ros is the oversampling rate
  • the value is 2 for the double sampling signal
  • linspace is the average calculation.
  • the method before adaptively compensating the sampled data of the I channel and the Q channel, the method further includes: performing frequency offset compensation on the sampled data of the I channel and the Q channel compensated by the adaptive receiving end; Carrier phase recovery is performed on the sampled data of the I-channel and the Q-channel; adaptive compensation is performed on the sampled data of the I-channel and the Q-channel, including: adaptive transmitter compensation is performed on the sampled data of the I-channel and the Q-channel.
  • the DSP processing device is equipped with a frequency offset compensator to perform frequency offset compensation on the sampled data of the I channel and the Q channel compensated by the adaptive receiving end, and through the transmitter end compensator to perform frequency offset compensation on the I channel and the Q channel after the carrier phase recovery
  • the sampled data is adaptively compensated at the transmitter.
  • the transmitter compensator can adopt a generalized linear blind equalization structure similar to the previous receiver compensator, or a pilot-based generalized linear equalizer.
  • the DSP processing device performs Fourier transform on each transmit equalization tap coefficient through the transmitter damage extraction module connected with the transmitter compensator, and calculates the argument angles of the I road and the Q road respectively according to the Fourier transform results, and the I road and the Q road The frequency derivation of the amplitude angle is performed separately to obtain the transmitting end damage of the I channel and the Q channel.
  • the method further includes: performing demapping and bit error rate (Bit Error Rate) on the sampling data of the I road and the Q road after the adaptive compensation Ratio, referred to as "BER") calculation.
  • Bit Error Rate Bit Error Rate
  • BER adaptive compensation Ratio
  • a frequency-domain generalized linear equalizer is proposed. Compared with the generalized linear equalizer in time domain, it has lower complexity. Compared with the traditional 2x2 MIMO equalizer, in addition to inheriting the compensation function of polarization demultiplexing and polarization mode dispersion, it has the compensation capability of the front-end damage of the coherent transceiver (amplitude imbalance, phase imbalance and IQ skew); second, for The generalized linear equalizer (regardless of the time domain or the frequency domain) proposes a dispersion pre-compensation architecture. Under the dispersion pre-compensation architecture, it can be guaranteed that the generalized linear equalizer can achieve the right The damage compensation of the front end of the transceiver retains its ability to completely compensate the damage.
  • the embodiment of the present application also relates to an optical signal impairment extraction device, which includes: an analog-to-digital converter 301 , a generalized linear equalizer 302 and a receiver impairment extraction module 303 .
  • the analog-to-digital converter 301 is configured to obtain sampling data of the I channel and the Q channel after the received light is mixed.
  • the generalized linear equalizer 302 is configured to perform adaptive compensation on the sampling data of the I channel and the Q channel; wherein, the adaptive compensation includes adaptive receiver compensation, and/or adaptive transmitter compensation.
  • the receiving end damage extraction module 303 that is, the receiving end skew extraction module, is used to obtain the converged equalization tap coefficients obtained by adaptive compensation, and obtain the damage of the I path and the Q path according to each equalization tap coefficient; wherein, the damage includes and Adaptively compensate for corresponding impairments at the receiving end and/or impairments at the transmitting end.
  • each equalization tap coefficient to obtain the damage of I road and Q road specifically, carry out Fourier transform to each equalization tap coefficient; Calculate the argument angle of I road and Q road respectively according to Fourier transform result;
  • the I-way and Q-way arguments are frequency derived to obtain the I-way and Q-way damage.
  • each equalization tap coefficient includes: h xx , h xy , h yx , h yy , h xx* , h xy* , h yx* and h yy* , which are respectively obtained according to the iterative results of the following formula:
  • x(k) and y(k) are the input signal sequence
  • x * (k) and y * (k) are the conjugate terms of x(k) and y(k) respectively
  • 0 ⁇ 1 is The iteration step size
  • e x and e y are error criteria.
  • Carry out Fourier transform to each equalization tap coefficient comprise: calculate and obtain each Fourier transform result of each equalization tap coefficient according to the following formula:
  • conj(z) is the conjugate of the complex number z
  • arg(z) is the argument of the complex number z
  • the frequency derivation of the I-way and Q-way arguments is performed separately to obtain the damage of the I-way and Q-way, including:
  • ⁇ is the angular frequency
  • the device further includes: a frequency offset compensator 304 , a carrier phase recovery module 305 , a transmitter compensator 306 and a transmitter impairment extraction module 307 .
  • the frequency offset compensator 304 is configured to perform frequency offset compensation on the sampled data of the I channel and the Q channel compensated by the adaptive receiving end.
  • the carrier phase recovery module 305 is configured to recover the carrier phase of the sampled data of the I channel and the Q channel after frequency offset compensation.
  • the transmitter compensator 306 is configured to perform adaptive transmitter compensation on the sampled data of the I channel and the Q channel after the carrier phase is recovered.
  • the transmitting end impairment extraction module 307 that is, the transmitting end skew extraction module, is used to obtain the converged transmission equalization tap coefficients obtained by adaptive compensation, and obtain the transmission end impairments of the I path and the Q path according to each emission equalization tap coefficient.
  • the device further includes: a demapping and BER calculation module 308 .
  • the demapping and BER calculation module 308 is configured to perform demapping and bit error rate calculation on the adaptively compensated I-way and Q-way sampling data.
  • the embodiment of the present application also relates to an electronic device, as shown in FIG. 4 , including: at least one processor 401; a memory 402 connected in communication with at least one processor; The executed instructions are executed by at least one processor 401 in any one of the foregoing method embodiments.
  • the memory 402 and the processor 401 are connected by a bus, and the bus may include any number of interconnected buses and bridges, and the bus connects one or more processors 401 and various circuits of the memory 402 together.
  • the bus may also connect together various other circuits such as peripherals, voltage regulators, and power management circuits, all of which are well known in the art and therefore will not be further described herein.
  • the bus interface provides an interface between the bus and the transceivers.
  • a transceiver may be a single element or multiple elements, such as multiple receivers and transmitters, providing means for communicating with various other devices over a transmission medium.
  • the information processed by the processor 401 is transmitted on the wireless medium through the antenna, and further, the antenna also receives the information and transmits the information to the processor 401 .
  • Processor 401 is responsible for managing the bus and general processing, and may also provide various functions including timing, peripheral interface, voltage regulation, power management, and other control functions. Instead, memory 402 may be used to store information used by the processor when performing operations.
  • Embodiments of the present application relate to a computer-readable storage medium storing a computer program.
  • the above method embodiments are implemented when the computer program is executed by the processor.
  • the aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes. .

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Abstract

Embodiments of the present application relate to the field of optical communications. Disclosed are an optical signal skew extraction method and apparatus, an electronic device, and a storage medium. In the present application, the optical signal skew extraction method comprises the following steps: acquiring sampling data of an I channel and a Q channel after received light is mixed; performing adaptive receiving end compensation for the sampling data of the I channel and the Q channel, wherein adaptive compensation comprises the adaptive receiving end compensation and/or adaptive transmitting end compensation; acquiring converged receiving equalization tap coefficients obtained by the adaptive receiving end compensation; and acquiring receiving end skews of the I channel and the Q channel according to the receiving equalization tap coefficients, wherein the skews comprise a receiving end skew and/or a transmitting end skew corresponding to the adaptive compensation.

Description

光信号损伤提取方法、装置、电子设备及存储介质Optical signal damage extraction method, device, electronic equipment and storage medium
相关申请的交叉引用Cross References to Related Applications
本申请要求在2021年10月11日提交的中国专利申请第202111182184.4号的优先权，该中国专利申请的全部内容通过引用包含于此。This application claims priority to Chinese Patent Application No. 202111182184.4 filed on October 11, 2021, the entire content of which is hereby incorporated by reference.
技术领域technical field
本申请实施例涉及光通信领域，特别涉及一种光信号损伤提取方法、装置、电子设备及存储介质。The embodiments of the present application relate to the field of optical communications, and in particular, to a method, device, electronic device, and storage medium for extracting optical signal damage.
背景技术Background technique
在光通信***当中，相干收发机的前端通常存在着诸如振幅不平衡，相位不平衡以及IQ(同相分量和正交分量)损伤(skew)等。其中振幅不平衡和相位不平衡可以由的补偿算法施密特正交化过程(Gram-Schmidt Orthogonalization Procedure，简称“GSOP”)来补偿和监测。对IQ skew损伤来讲，主要采用插值的方式来补偿，但由于温度变化器件老化等原因，IQ skew的值是缓慢变化的，静态的插值滤波器无法自适应的对IQ skew进行补偿。对此，又出现了一些自适应补偿skew的均衡方法，包括使用广义线性均衡器对skew进行自适应补偿。In an optical communication system, the front end of a coherent transceiver usually suffers from amplitude imbalance, phase imbalance, and IQ (in-phase component and quadrature component) impairments (skew), etc. The amplitude imbalance and phase imbalance can be compensated and monitored by the Gram-Schmidt Orthogonalization Procedure (Gram-Schmidt Orthogonalization Procedure, referred to as "GSOP"). For IQ skew damage, interpolation is mainly used to compensate, but due to temperature changes, device aging and other reasons, the value of IQ skew changes slowly, and the static interpolation filter cannot adaptively compensate for IQ skew. In response to this, some equalization methods for adaptively compensating for skew have emerged, including using a generalized linear equalizer for adaptively compensating for skew.
然而实践中不仅仅需要补偿掉skew，还希望广义线性均衡器能估计和提取出相应的skew值。However, in practice, it is not only necessary to compensate the skew, but also hope that the generalized linear equalizer can estimate and extract the corresponding skew value.
发明内容Contents of the invention
本申请实施例的主要目的在于提出一种光信号损伤提取方法、装置、电子设备及存储介质，实现自适应补偿skew并提取skew值。The main purpose of the embodiments of the present application is to provide a method, device, electronic device and storage medium for extracting optical signal impairments, so as to realize adaptive compensation for skew and extract skew values.
为实现上述目的，本申请实施例提供了一种光信号损伤提取方法，包括以下步骤：获取接收光混频后I路和Q路的采样数据；对I路和Q路的采样 数据进行自适应接收端补偿；其中，自适应补偿包括自适应接收端补偿，和/或，自适应发射端补偿；获取自适应接收端补偿得到的收敛后的各接收均衡抽头系数；根据各接收均衡抽头系数获取I路和Q路的接收端损伤；其中，损伤包括与自适应补偿对应的接收端损伤，和/或，发射端损伤。In order to achieve the above purpose, the embodiment of the present application provides a method for extracting optical signal damage, including the following steps: obtaining the sampling data of the I channel and the Q channel after the received light is mixed; Compensation at the receiving end; wherein, the adaptive compensation includes adaptive receiving end compensation, and/or adaptive transmitting end compensation; obtaining the converged receiving equalization tap coefficients obtained by the adaptive receiving end compensation; obtaining according to each receiving equalizing tap coefficient Impairments at the receiving end of the I-path and the Q-path; where the impairments include impairments at the receiving end corresponding to adaptive compensation, and/or impairments at the transmitting end.
为实现上述目的，本申请实施例还提供了一种光信号损伤提取装置，包括：模拟数字转换器，用于获取接收光混频后I路和Q路的采样数据；广义线性均衡器，用于对I路和Q路的采样数据进行自适应补偿；其中，自适应补偿包括自适应接收端补偿，和/或，自适应发射端补偿；损伤提取模块，用于获取自适应补偿得到的收敛后的各均衡抽头系数，根据各均衡抽头系数获取I路和Q路的损伤；其中，损伤包括与自适应补偿对应的接收端损伤，和/或，发射端损伤。In order to achieve the above object, the embodiment of the present application also provides an optical signal damage extraction device, including: an analog-to-digital converter, used to obtain the sampling data of the I channel and the Q channel after the received light is mixed; a generalized linear equalizer, used Adaptive compensation is performed on the sampling data of the I channel and the Q channel; wherein, the adaptive compensation includes adaptive receiver compensation, and/or, adaptive transmitter compensation; the damage extraction module is used to obtain the convergence obtained by the adaptive compensation After each equalization tap coefficient, the impairments of the I path and the Q path are obtained according to each equalization tap coefficient; wherein, the impairment includes an impairment at the receiving end corresponding to the adaptive compensation, and/or an impairment at the transmitting end.
为实现上述目的，本申请实施例还提供了一种电子设备，包括：至少一个处理器；与至少一个处理器通信连接的存储器；存储器存储有可被至少一个处理器执行的指令，指令被至少一个处理器执行，以使至少一个处理器能够执行上述的光信号损伤提取方法。To achieve the above purpose, an embodiment of the present application also provides an electronic device, including: at least one processor; a memory connected to the at least one processor in communication; the memory stores instructions that can be executed by the at least one processor, and the instructions are executed by at least one processor Executed by a processor, so that at least one processor can execute the above optical signal impairment extraction method.
为实现上述目的，本申请实施例还提供了一种计算机可读存储介质，存储有计算机程序，计算机程序被处理器执行时实现上述的光信号损伤提取方法。To achieve the above purpose, an embodiment of the present application further provides a computer-readable storage medium storing a computer program, and implementing the above optical signal damage extraction method when the computer program is executed by a processor.
附图说明Description of drawings
一个或多个实施例通过与之对应的附图中的图片进行示例性说明，这些示例性说明并不构成对实施例的限定，附图中具有相同参考数字标号的元件表示为类似的元件，除非有特别申明，附图中的图不构成比例限制。One or more embodiments are exemplified by the pictures in the corresponding drawings, and these exemplifications do not constitute a limitation to the embodiments. Elements with the same reference numerals in the drawings represent similar elements. Unless otherwise stated, the drawings in the drawings are not limited to scale.
图1是根据本申请一实施例提供的光信号损伤提取方法流程示意图；FIG. 1 is a schematic flowchart of a method for extracting optical signal damage according to an embodiment of the present application;
图2是根据本申请一实施例提供的广义线性均衡器结构示意图；FIG. 2 is a schematic structural diagram of a generalized linear equalizer provided according to an embodiment of the present application;
图3是根据本申请一实施例提供的光信号损伤提取装置结构示意图；Fig. 3 is a schematic structural diagram of an optical signal damage extraction device provided according to an embodiment of the present application;
图4是根据本申请一实施例提供的电子设备结构示意图。Fig. 4 is a schematic structural diagram of an electronic device provided according to an embodiment of the present application.
具体实施方式Detailed ways
为使本申请实施例的目的、技术方案和优点更加清楚，下面将结合附图对本申请的各实施例进行详细的阐述。然而，本领域的普通技术人员可以理解，在本申请各实施例中，为了使读者更好地理解本申请而提出了许多技术细节。但是，即使没有这些技术细节和基于以下各实施例的种种变化和修改，也可以实现本申请所要求保护的技术方案。以下各个实施例的划分是为了描述方便，不应对本申请的具体实现方式构成任何限定，各个实施例在不矛盾的前提下可以相互结合相互引用。In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the embodiments of the present application will be described in detail below with reference to the accompanying drawings. However, those of ordinary skill in the art can understand that in each embodiment of the application, many technical details are provided for readers to better understand the application. However, even without these technical details and various changes and modifications based on the following embodiments, the technical solutions claimed in this application can also be realized. The division of the following embodiments is for the convenience of description, and should not constitute any limitation to the specific implementation of the present application, and the embodiments can be combined and referred to each other on the premise of no contradiction.
本申请的实施例涉及一种光信号损伤提取方法，如图1所示，方法具体包括以下步骤。The embodiment of the present application relates to a method for extracting optical signal damage. As shown in FIG. 1 , the method specifically includes the following steps.
步骤101，获取接收光混频后I路和Q路的采样数据。 Step 101, acquire the sampling data of the I channel and the Q channel after the received light is mixed.
步骤102，对I路和Q路的采样数据进行自适应补偿；其中，自适应补偿包括自适应接收端补偿，和/或，自适应发射端补偿。 Step 102, performing adaptive compensation on the sampling data of the I channel and the Q channel; wherein, the adaptive compensation includes adaptive receiver compensation, and/or adaptive transmitter compensation.
步骤103，获取自适应补偿得到的收敛后的各均衡抽头系数。 Step 103, acquiring the converged equalization tap coefficients obtained by adaptive compensation.
步骤104，根据各均衡抽头系数获取I路和Q路的损伤；其中，损伤包括与自适应补偿对应的接收端损伤，和/或，发射端损伤。Step 104: Acquire the impairments of the I-path and the Q-path according to each equalization tap coefficient; wherein, the impairments include impairments at the receiving end corresponding to adaptive compensation, and/or impairments at the transmitting end.
本实施例的光信号损伤提取方法，应用于相干光通信***的光信号损伤提取装置，光信号损伤提取装置例如由模拟数字转换器(Analog to Digital Converter，简称“ADC”)、均衡器和接收端损伤提取模块组成的数字信号处理(Digital Signal Processing，简称“DSP”)处理装置中，与相干收发机配合使用。对相干收发机的前端存在的IQ损伤进行补偿和提取，以便后续对IQ损伤进行监测。本实施例的光信号损伤提取方法，可以作用在工厂阶段，用软件或者硬件的方式对光收发端模块skew损伤的标定技术去标定光收发端模块的损伤，或者作为现网中的监测模块来监测网络当中由于模块老化，温 度漂移等引起的skew损伤，将其上报给网络管理单元，方便故障诊断和定位，还可以将整套DSP集成作为一种用于现场诊断或者工厂阶段的模块的批量化测试仪器。The optical signal impairment extraction method of this embodiment is applied to an optical signal impairment extraction device of a coherent optical communication system. In a digital signal processing (Digital Signal Processing, referred to as "DSP") processing device composed of an end damage extraction module, it is used in conjunction with a coherent transceiver. Compensate and extract the IQ impairment existing in the front end of the coherent transceiver, so as to monitor the IQ impairment subsequently. The optical signal damage extraction method of this embodiment can be used in the factory stage to calibrate the optical transceiver module skew damage calibration technology in the form of software or hardware, or as a monitoring module in the live network. Monitor the skew damage caused by module aging and temperature drift in the network, and report it to the network management unit to facilitate fault diagnosis and positioning. It can also integrate the entire set of DSP as a batch of modules for on-site diagnosis or factory stage test instrument.
其中，一个完整的相干光通信***包括发射端、接收端以及光纤信道。在发射端，调制器将数据调制到光载波上，通过光纤信道的传输，在接收端对其进行相干检测，利用本地光与接收的信号光(即接收光)进行混频，经过ADC的采样，信号成为离散的数字信号，进行数字信号处理，对信号进行恢复得到传输的数据。Among them, a complete coherent optical communication system includes a transmitting end, a receiving end and an optical fiber channel. At the transmitting end, the modulator modulates the data onto the optical carrier, through the transmission of the optical fiber channel, coherently detects it at the receiving end, uses the local light to mix with the received signal light (that is, the received light), and is sampled by the ADC , the signal becomes a discrete digital signal, digital signal processing is performed, and the signal is restored to obtain the transmitted data.
在一些DSP处理装置中，尽管工厂阶段的校准可以抑制以及补偿掉大部分的损伤，但通常情况下均会有这些损伤的残留。同时因为温度变化，器件老化等原因，即便校准的很好的器件也有可能在实际应用过程当中出现这些损伤。光通信***在低速和低阶调制格式传输的情况下，对这些损伤的容忍度还较高。但随着调制阶数的增加以及调制的波特率增加，这些残存的前端损伤将会造成可观的性能代价。如何监测和补偿收发端损伤是一大挑战。自适应补偿接收端skew的均衡方法主要有三种：一种是基于4x4MIMO(multiple-in multiple-out，多进多出)均衡器的方法；一种是基于4x2MIMO均衡器的方法；另外一种是广义线性均衡器的方案。其中，基于4x4MIMO以及基于4x2MIMO均衡器补偿接收端skew的均衡方法都可以实现提取接收端skew，但基于广义线性均衡器的补偿接收端skew的均衡方法不像4x4MIMO和4x2MIMO那样直观，难以实现利用广义线性均衡器提取接收端skew。此外发射端的不平衡以及skew损伤也是相干光通信***中的重要损伤，一般采用预校准的方式来做出厂前的补偿，然而如何在线的补偿发端skew的方法仍是一个问题。目前没有利用广义线性均衡器补偿和监测发射端skew的方法。In some DSP processing devices, although factory-level calibration can suppress and compensate for most of the impairments, there are often residuals of these impairments. At the same time, due to temperature changes, device aging and other reasons, even a well-calibrated device may have these damages in the actual application process. In the case of low-speed and low-order modulation format transmission, the optical communication system has a relatively high tolerance to these impairments. However, as the modulation order increases and the modulation baud rate increases, these residual front-end impairments will cause a considerable performance penalty. How to monitor and compensate for transceiver impairments is a big challenge. There are three main equalization methods for adaptively compensating for skew at the receiving end: one is based on a 4x4MIMO (multiple-in multiple-out) equalizer; the other is based on a 4x2MIMO equalizer; the other is A scheme for a generalized linear equalizer. Among them, the equalization method based on 4x4MIMO and 4x2MIMO equalizer to compensate the skew of the receiving end can realize the extraction of skew at the receiving end, but the equalization method based on the generalized linear equalizer to compensate for the skew of the receiving end is not as intuitive as 4x4MIMO and 4x2MIMO, and it is difficult to realize the use of generalized linear equalizer. The linear equalizer extracts the receiver skew. In addition, the unbalance and skew damage at the transmitting end are also important damages in coherent optical communication systems. Pre-calibration methods are generally used to compensate before the factory. However, how to compensate the skew at the transmitting end online is still a problem. There is currently no method for compensating and monitoring skew at the transmitter using a generalized linear equalizer.
本实施例中，通过获取光调制后I路和Q路的采样数据，对I路和Q路的采样数据进行自适应补偿，获取自适应补偿得到的收敛后的各均衡抽头系 数，根据各均衡抽头系数获取I路和Q路的损伤，可以在自适应补偿skew后，实现提取I路和Q路的损伤，即I路和Q路的skew值，由于自适应补偿包括自适应接收端补偿，和/或，自适应发射端补偿，因此，提取的I路和Q路的损伤是与自适应补偿对应的接收端损伤，和/或，发射端损伤，实现对I路和Q路的接收端损伤，或者发射端损伤，或者，接收端损伤和发射端损伤进行提取。In this embodiment, by acquiring the sampling data of the I channel and the Q channel after optical modulation, adaptive compensation is performed on the sampling data of the I channel and the Q channel, and the converged equalization tap coefficients obtained by the adaptive compensation are obtained. The tap coefficient obtains the damage of the I channel and the Q channel, and after adaptively compensating the skew, the impairment of the I channel and the Q channel can be extracted, that is, the skew value of the I channel and the Q channel. Since the adaptive compensation includes the adaptive receiver compensation, And/or, adaptive transmitting end compensation, therefore, the damage of the extracted I road and Q road is the receiving end damage corresponding to the adaptive compensation, and/or, the transmitting end damage, realizes the receiving end of I road and Q road Impairment at the transmitting end, or at the transmitting end, or at the receiving end and at the transmitting end.
下面对本实施例的光信号损伤提取方法实现细节进行具体的说明，以下内容仅为方便理解提供的实现细节，并非实施本方案的必须。The implementation details of the method for extracting optical signal impairments in this embodiment will be described in detail below. The following content is only implementation details provided for easy understanding, and is not necessary for implementing this solution.
在步骤101中，DSP处理装置获取接收光混频后I路和Q路的采样数据。具体地，I路和Q路的采样数据是经过模数转换器即ADC输出的二倍采样数据。在接收光输入ADC前，接收光需要经过90度混频器的进行混频得到接收光的I路信号和Q路信号，从而经过ADC采样后得到两路信号的采样数据。In step 101, the DSP processing device acquires the sampling data of the I channel and the Q channel after the received light is mixed. Specifically, the sampling data of the I channel and the Q channel are double sampling data outputted through an analog-to-digital converter (ADC). Before the received light is input to the ADC, the received light needs to be mixed by a 90-degree mixer to obtain the I-channel signal and the Q-channel signal of the received light, so that the sampling data of the two-channel signals can be obtained after being sampled by the ADC.
在步骤102中，DSP处理装置对I路和Q路的采样数据进行自适应补偿。其中，自适应补偿包括自适应接收端补偿，和/或，自适应发射端补偿。具体地，使用广义线性均衡器对两路采样数据进行的损伤补偿，广义线性均衡器将两路复信号，求取共轭，然后将复信号以及其共轭项作为4x2MIMO均衡器的输入，从而补偿掉损伤。其中，广义线性均衡器可以由Volterra后向逆均衡器一阶变型得到，可以对信号的线性损伤和IQ不平衡即IQ损伤进行补偿处理。In step 102, the DSP processing device performs adaptive compensation on the sampling data of the I channel and the Q channel. Wherein, the adaptive compensation includes adaptive receiver compensation, and/or adaptive transmitter compensation. Specifically, using a generalized linear equalizer to perform damage compensation on the two-way sampling data, the generalized linear equalizer takes the two-way complex signals to obtain the conjugate, and then uses the complex signal and its conjugate items as the input of the 4x2MIMO equalizer, thereby Compensate for damage. Among them, the generalized linear equalizer can be obtained by the first-order modification of the Volterra backward inverse equalizer, which can compensate the linear damage and IQ imbalance of the signal, that is, the IQ damage.
在步骤103中，DSP处理装置获取自适应补偿得到的收敛后的各均衡抽头系数。In step 103, the DSP processing device acquires the converged equalization tap coefficients obtained by adaptive compensation.
在一个例子中，如图2所示，是一个广义线性均衡器结构，x(k)和y(k)为输入的信号序列，通过共轭操作() *得到其共轭项x *(k)和y *(k)，h pq为联接输入q和输出p的均衡器系数，其中q∈{x,y,x *,y *},p∈{x,y}。其中，如图2所示，各均衡抽头系数包括：h xx、h xy、h yx、h yy、h xx*、h xy*、h yx*和h yy*，分别根据下 式的迭代结果得到： In one example, as shown in Figure 2, it is a generalized linear equalizer structure, x(k) and y(k) are input signal sequences, and its conjugate term x * (k ) and y * (k), h pq is the equalizer coefficient connecting input q and output p, where q∈{x,y,x * ,y * },p∈{x,y}. Among them, as shown in Figure 2, each equalization tap coefficient includes: h xx , h xy , h yx , h yy , h xx* , h xy* , h yx* and h yy* , which are obtained according to the iterative results of the following formula :
h xx(k+1)＝h xx(k)+μe x(k)x *(k) h xx (k+1)＝h xx (k)+μe x (k)x * (k)
h xy(k+1)＝h xy(k)+μe x(k)y *(k) h xy (k+1)＝h xy (k)+μe x (k)y * (k)
Figure PCTCN2022121778-appb-000001
Figure PCTCN2022121778-appb-000001
Figure PCTCN2022121778-appb-000002
Figure PCTCN2022121778-appb-000002
Figure PCTCN2022121778-appb-000003
Figure PCTCN2022121778-appb-000003
Figure PCTCN2022121778-appb-000004
Figure PCTCN2022121778-appb-000004
Figure PCTCN2022121778-appb-000005
Figure PCTCN2022121778-appb-000005
Figure PCTCN2022121778-appb-000006
Figure PCTCN2022121778-appb-000006
其中，x(k)和y(k)为输入的信号序列，x *(k)和y *(k)分别是x(k)和y(k)的共轭项，0＜μ＜1是迭代步长，e x和e y是误差准则，其计算可以根据不同的调制格式和算法架构来选择，例如对PDM-nPSK这类的横模调制格式可以选择CMA算法，其误差函数可以表示为： Among them, x(k) and y(k) are the input signal sequence, x * (k) and y * (k) are the conjugate terms of x(k) and y(k) respectively, 0<μ<1 is The iterative step size, e x and e y are error criteria, and its calculation can be selected according to different modulation formats and algorithm architectures. For example, the CMA algorithm can be selected for transverse mode modulation formats such as PDM-nPSK, and its error function can be expressed as :
Figure PCTCN2022121778-appb-000007
Figure PCTCN2022121778-appb-000007
Figure PCTCN2022121778-appb-000008
Figure PCTCN2022121778-appb-000008
如果对于PDM-8QAM，PDM-16QAM以及PDM-32QAM等调制格式，可以考虑径向判决算法(RDE)：For modulation formats such as PDM-8QAM, PDM-16QAM and PDM-32QAM, radial decision algorithm (RDE) can be considered:
Figure PCTCN2022121778-appb-000009
Figure PCTCN2022121778-appb-000009
Figure PCTCN2022121778-appb-000010
Figure PCTCN2022121778-appb-000010
其中R x(k)以及R y(k)是RDE算法的判决半径。此外常见的DD-LMS(判决引导的最小均方)等等算法亦可以用系数的升级迭代，其主要的区别在于误差准则的选择。 Where R x (k) and R y (k) are the decision radius of the RDE algorithm. In addition, common algorithms such as DD-LMS (decision-guided least mean square) can also use coefficient upgrade iterations, and the main difference lies in the selection of error criteria.
在步骤104中，DSP处理装置根据各均衡抽头系数获取I路和Q路的损伤。In step 104, the DSP processing device acquires impairments of the I-way and the Q-way according to each equalization tap coefficient.
在一个例子中，根据各均衡抽头系数获取I路和Q路的损伤，具体为：对各均衡抽头系数进行傅里叶变换，根据傅里叶变换结果分别计算I路和Q路幅角，对I路和Q路幅角分别进行频率求导得到I路和Q路的损伤。In one example, the impairments of the I-way and the Q-way are obtained according to the equalization tap coefficients, specifically: performing Fourier transform on each equalization tap coefficient, and calculating the argument angles of the I-way and Q-way respectively according to the Fourier transform results, for The I-way and Q-way arguments are frequency derived to obtain the I-way and Q-way damage.
进一步地，DSP处理装置先将收敛之后的均衡抽头系数进行傅里叶变换，得到：Further, the DSP processing device first performs Fourier transform on the converged equalization tap coefficients to obtain:
Figure PCTCN2022121778-appb-000011
Figure PCTCN2022121778-appb-000011
按以下表达式估计接收端IQ skew：Estimate the receiver IQ skew by the following expression:
Figure PCTCN2022121778-appb-000012
Figure PCTCN2022121778-appb-000012
Figure PCTCN2022121778-appb-000013
其中，ω是角频率，通过下式计算得到：
Figure PCTCN2022121778-appb-000013
where ω is the angular frequency, calculated by the following formula:
ω＝2πfω=2πf
f＝linspace(-Ntap/2:1:Ntap/2,Ntap).'f=linspace(-Ntap/2:1:Ntap/2,Ntap).'
*(R B*r os/Ntap) *(R B *r os /Ntap)
其中Ntap为抽头数，R B为信号的波特率，r os为过采样率，对二倍采样信号取值为2,对一倍采样信号，为1，linspace是均分计算。 Among them, Ntap is the number of taps, RB is the baud rate of the signal, ros is the oversampling rate, the value is 2 for the double sampling signal, and 1 for the double sampling signal, and linspace is the average calculation.
在一个例子中，在对I路和Q路的采样数据进行自适应补偿之前，方法还包括：对自适应接收端补偿后的I路和Q路的采样数据进行频偏补偿；对频偏补偿后的I路和Q路的采样数据进行载波相位恢复；对I路和Q路的采样数据进行自适应补偿，包括：对I路和Q路的采样数据进行自适应发射端补偿。In an example, before adaptively compensating the sampled data of the I channel and the Q channel, the method further includes: performing frequency offset compensation on the sampled data of the I channel and the Q channel compensated by the adaptive receiving end; Carrier phase recovery is performed on the sampled data of the I-channel and the Q-channel; adaptive compensation is performed on the sampled data of the I-channel and the Q-channel, including: adaptive transmitter compensation is performed on the sampled data of the I-channel and the Q-channel.
其中，DSP处理装置通过配备频偏补偿器，对自适应接收端补偿后的I路和Q路的采样数据进行频偏补偿，通过发射端补偿器，对载波相位恢复后的I路和Q路的采样数据进行自适应发射端补偿，发射端补偿器是可以采用之前接收端补偿器中类似的广义线性盲均衡结构，也可以采用基于导频的广义线性均衡器。Among them, the DSP processing device is equipped with a frequency offset compensator to perform frequency offset compensation on the sampled data of the I channel and the Q channel compensated by the adaptive receiving end, and through the transmitter end compensator to perform frequency offset compensation on the I channel and the Q channel after the carrier phase recovery The sampled data is adaptively compensated at the transmitter. The transmitter compensator can adopt a generalized linear blind equalization structure similar to the previous receiver compensator, or a pilot-based generalized linear equalizer.
DSP处理装置通过与发射端补偿器连接的发射端损伤提取模块，对各发射均衡抽头系数进行傅里叶变换，根据傅里叶变换结果分别计算I路和Q路幅角，对I路和Q路幅角分别进行频率求导得到I路和Q路的发射端损伤。The DSP processing device performs Fourier transform on each transmit equalization tap coefficient through the transmitter damage extraction module connected with the transmitter compensator, and calculates the argument angles of the I road and the Q road respectively according to the Fourier transform results, and the I road and the Q road The frequency derivation of the amplitude angle is performed separately to obtain the transmitting end damage of the I channel and the Q channel.
本实施例中，通过进行接收端补偿后的采样数据进行频偏补偿和载波相位恢复，对接收端接收过程中的损失进行补偿恢复，将信号采样数据恢复到接收端接收前的状态，因此可以对发射端进行补偿，获取发射端损伤。In this embodiment, by performing frequency offset compensation and carrier phase recovery on the sampled data compensated by the receiving end, the loss in the receiving process of the receiving end is compensated and restored, and the signal sampling data is restored to the state before receiving at the receiving end, so it can Compensate the transmitting end to obtain the damage of the transmitting end.
在一个例子中，在在对I路和Q路的采样数据进行自适应补偿后，方法还包括：对自适应补偿后的I路和Q路的采样数据进行解映射和比特差错率 (Bit Error Ratio，简称“BER”)计算。通过对自适应补偿后的I路和Q路的采样数据进行解映射和BER计算，可以恢复得到无损伤的信号，提高信号传输的准确度。In one example, after adaptively compensating the sampling data of the I road and the Q road, the method further includes: performing demapping and bit error rate (Bit Error Rate) on the sampling data of the I road and the Q road after the adaptive compensation Ratio, referred to as "BER") calculation. By performing demapping and BER calculation on the sampled data of the I channel and the Q channel after adaptive compensation, the signal without damage can be recovered and the accuracy of signal transmission can be improved.
本申请中，提出频域广义线性均衡器。相对于时域广义线性均衡器具有更低的复杂度。相对于传统的2x2MIMO均衡器，除了继承偏振解复用和偏振模色散的补偿功能外，具备了相干收发机前端损伤(振幅不平衡，相位不平衡以及IQ skew)的补偿能力；第二，针对广义线性均衡器(无论时域还是频域)，提出了一种色散预补偿的架构，在该色散预补偿架构下，可以保证广义线性均衡器在较少均衡抽头数的情况下即可以实现对收发机前端损伤的补偿，保留其将损伤完全补偿掉的能力。In this application, a frequency-domain generalized linear equalizer is proposed. Compared with the generalized linear equalizer in time domain, it has lower complexity. Compared with the traditional 2x2 MIMO equalizer, in addition to inheriting the compensation function of polarization demultiplexing and polarization mode dispersion, it has the compensation capability of the front-end damage of the coherent transceiver (amplitude imbalance, phase imbalance and IQ skew); second, for The generalized linear equalizer (regardless of the time domain or the frequency domain) proposes a dispersion pre-compensation architecture. Under the dispersion pre-compensation architecture, it can be guaranteed that the generalized linear equalizer can achieve the right The damage compensation of the front end of the transceiver retains its ability to completely compensate the damage.
本申请的实施例还涉及一种光信号损伤提取装置，包括：模拟数字转换器301、广义线性均衡器302和接收端损伤提取模块303。The embodiment of the present application also relates to an optical signal impairment extraction device, which includes: an analog-to-digital converter 301 , a generalized linear equalizer 302 and a receiver impairment extraction module 303 .
模拟数字转换器301，用于获取接收光混频后I路和Q路的采样数据。The analog-to-digital converter 301 is configured to obtain sampling data of the I channel and the Q channel after the received light is mixed.
广义线性均衡器302，用于对I路和Q路的采样数据进行自适应补偿；其中，自适应补偿包括自适应接收端补偿，和/或，自适应发射端补偿。The generalized linear equalizer 302 is configured to perform adaptive compensation on the sampling data of the I channel and the Q channel; wherein, the adaptive compensation includes adaptive receiver compensation, and/or adaptive transmitter compensation.
接收端损伤提取模块303，即，接收端skew提取模块，用于获取自适应补偿得到的收敛后的各均衡抽头系数，根据各均衡抽头系数获取I路和Q路的损伤；其中，损伤包括与自适应补偿对应的接收端损伤，和/或，发射端损伤。The receiving end damage extraction module 303, that is, the receiving end skew extraction module, is used to obtain the converged equalization tap coefficients obtained by adaptive compensation, and obtain the damage of the I path and the Q path according to each equalization tap coefficient; wherein, the damage includes and Adaptively compensate for corresponding impairments at the receiving end and/or impairments at the transmitting end.
在一个例子中，根据各均衡抽头系数获取I路和Q路的损伤，具体为，对各均衡抽头系数进行傅里叶变换；根据傅里叶变换结果分别计算I路和Q路幅角；对I路和Q路幅角分别进行频率求导得到I路和Q路的损伤。In an example, according to each equalization tap coefficient to obtain the damage of I road and Q road, specifically, carry out Fourier transform to each equalization tap coefficient; Calculate the argument angle of I road and Q road respectively according to Fourier transform result; The I-way and Q-way arguments are frequency derived to obtain the I-way and Q-way damage.
在一个例子中，各均衡抽头系数包括：h xx、h xy、h yx、h yy、h xx*、h xy*、h yx*和h yy*，分别根据下式的迭代结果得到： In an example, each equalization tap coefficient includes: h xx , h xy , h yx , h yy , h xx* , h xy* , h yx* and h yy* , which are respectively obtained according to the iterative results of the following formula:
h xx(k+1)＝h xx(k)+μe x(k)x *(k) h xx (k+1)＝h xx (k)+μe x (k)x * (k)
h xy(k+1)＝h xy(k)+μe x(k)y *(k) h xy (k+1)＝h xy (k)+μe x (k)y * (k)
Figure PCTCN2022121778-appb-000014
Figure PCTCN2022121778-appb-000014
Figure PCTCN2022121778-appb-000015
Figure PCTCN2022121778-appb-000015
Figure PCTCN2022121778-appb-000016
Figure PCTCN2022121778-appb-000016
Figure PCTCN2022121778-appb-000017
Figure PCTCN2022121778-appb-000017
Figure PCTCN2022121778-appb-000018
Figure PCTCN2022121778-appb-000018
Figure PCTCN2022121778-appb-000019
Figure PCTCN2022121778-appb-000019
其中，x(k)和y(k)为输入的信号序列，x *(k)和y *(k)分别是x(k)和y(k)的共轭项，0＜μ＜1是迭代步长，e x和e y是误差准则。 Among them, x(k) and y(k) are the input signal sequence, x * (k) and y * (k) are the conjugate terms of x(k) and y(k) respectively, 0<μ<1 is The iteration step size, e x and e y are error criteria.
对各均衡抽头系数进行傅里叶变换，包括：根据下式计算得到各均衡抽头系数的各傅里叶变换结果：Carry out Fourier transform to each equalization tap coefficient, comprise: calculate and obtain each Fourier transform result of each equalization tap coefficient according to the following formula:
Figure PCTCN2022121778-appb-000020
Figure PCTCN2022121778-appb-000020
根据傅里叶变换结果分别计算I路和Q路幅角，包括：According to the results of the Fourier transform, the arguments of the I and Q channels are calculated separately, including:
Figure PCTCN2022121778-appb-000021
Figure PCTCN2022121778-appb-000021
其中，conj(z)是复数z的共轭，arg(z)是复数z的幅角；Among them, conj(z) is the conjugate of the complex number z, and arg(z) is the argument of the complex number z;
对I路和Q路幅角分别进行频率求导得到I路和Q路的损伤，包括：The frequency derivation of the I-way and Q-way arguments is performed separately to obtain the damage of the I-way and Q-way, including:
Figure PCTCN2022121778-appb-000022
其中，ω是角频率。
Figure PCTCN2022121778-appb-000022
where ω is the angular frequency.
在一个例子中，装置还包括：频偏补偿器304、载波相位恢复模块305、发射端补偿器306和发射端损伤提取模块307。In an example, the device further includes: a frequency offset compensator 304 , a carrier phase recovery module 305 , a transmitter compensator 306 and a transmitter impairment extraction module 307 .
频偏补偿器304，用于对自适应接收端补偿后的I路和Q路的采样数据进行频偏补偿。The frequency offset compensator 304 is configured to perform frequency offset compensation on the sampled data of the I channel and the Q channel compensated by the adaptive receiving end.
载波相位恢复模块305，用于对频偏补偿后的I路和Q路的采样数据进行载波相位恢复。The carrier phase recovery module 305 is configured to recover the carrier phase of the sampled data of the I channel and the Q channel after frequency offset compensation.
发射端补偿器306，用于对载波相位恢复后的I路和Q路的采样数据进行自适应发射端补偿。The transmitter compensator 306 is configured to perform adaptive transmitter compensation on the sampled data of the I channel and the Q channel after the carrier phase is recovered.
发射端损伤提取模块307，即，发射端skew提取模块，用于获取自适应 补偿得到的收敛后的各发射均衡抽头系数，根据各发射均衡抽头系数获取I路和Q路的发射端损伤。The transmitting end impairment extraction module 307, that is, the transmitting end skew extraction module, is used to obtain the converged transmission equalization tap coefficients obtained by adaptive compensation, and obtain the transmission end impairments of the I path and the Q path according to each emission equalization tap coefficient.
在一个例子中，如图3所示，装置还包括：解映射和BER计算模块308。In an example, as shown in FIG. 3 , the device further includes: a demapping and BER calculation module 308 .
解映射和BER计算模块308，用于对自适应补偿后的I路和Q路的采样数据进行解映射和比特差错率计算。The demapping and BER calculation module 308 is configured to perform demapping and bit error rate calculation on the adaptively compensated I-way and Q-way sampling data.
本申请的实施例还涉及一种电子设备，如图4所示，包括：至少一个处理器401；与至少一个处理器通信连接的存储器402；其中，存储器402存储有可被至少一个处理器401执行的指令，指令被至少一个处理器401执行上述的任一方法实施例。The embodiment of the present application also relates to an electronic device, as shown in FIG. 4 , including: at least one processor 401; a memory 402 connected in communication with at least one processor; The executed instructions are executed by at least one processor 401 in any one of the foregoing method embodiments.
其中，存储器402和处理器401采用总线方式连接，总线可以包括任意数量的互联的总线和桥，总线将一个或多个处理器401和存储器402的各种电路连接在一起。总线还可以将诸如***设备、稳压器和功率管理电路等之类的各种其他电路连接在一起，这些都是本领域所公知的，因此，本文不再对其进行进一步描述。总线接口在总线和收发机之间提供接口。收发机可以是一个元件，也可以是多个元件，比如多个接收器和发送器，提供用于在传输介质上与各种其他装置通信的单元。经处理器401处理的信息通过天线在无线介质上进行传输，进一步，天线还接收信息并将信息传送给处理器401。Wherein, the memory 402 and the processor 401 are connected by a bus, and the bus may include any number of interconnected buses and bridges, and the bus connects one or more processors 401 and various circuits of the memory 402 together. The bus may also connect together various other circuits such as peripherals, voltage regulators, and power management circuits, all of which are well known in the art and therefore will not be further described herein. The bus interface provides an interface between the bus and the transceivers. A transceiver may be a single element or multiple elements, such as multiple receivers and transmitters, providing means for communicating with various other devices over a transmission medium. The information processed by the processor 401 is transmitted on the wireless medium through the antenna, and further, the antenna also receives the information and transmits the information to the processor 401 .
处理器401负责管理总线和通常的处理，还可以提供各种功能，包括定时，***接口，电压调节、电源管理以及其他控制功能。而存储器402可以被用于存储处理器在执行操作时所使用的信息。 Processor 401 is responsible for managing the bus and general processing, and may also provide various functions including timing, peripheral interface, voltage regulation, power management, and other control functions. Instead, memory 402 may be used to store information used by the processor when performing operations.
本申请的实施例涉及一种计算机可读存储介质，存储有计算机程序。计算机程序被处理器执行时实现上述方法实施例。Embodiments of the present application relate to a computer-readable storage medium storing a computer program. The above method embodiments are implemented when the computer program is executed by the processor.
即，本领域技术人员可以理解，实现上述实施例方法中的全部或部分步骤是可以通过程序来指令相关的硬件来完成，该程序存储在一个存储介质中，包括若干指令用以使得一个设备(可以是单片机，芯片等)或处理器(processor)执行本申请各个实施例方法的全部或部分步骤。而前述的存储介质包括：U 盘、移动硬盘、只读存储器(ROM，Read-Only Memory)、随机存取存储器(RAM，Random Access Memory)、磁碟或者光盘等各种可以存储程序代码的介质。That is, those skilled in the art can understand that all or part of the steps in the method of the above-mentioned embodiments can be completed by instructing related hardware through a program, the program is stored in a storage medium, and includes several instructions to make a device ( It may be a single-chip microcomputer, a chip, etc.) or a processor (processor) to execute all or part of the steps of the methods in the various embodiments of the present application. The aforementioned storage media include: U disk, mobile hard disk, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), magnetic disk or optical disk and other media that can store program codes. .
本领域的普通技术人员可以理解，上述各实施方式是实现本申请的具体实施例，而在实际应用中，可以在形式上和细节上对其作各种改变，而不偏离本申请的精神和范围。Those of ordinary skill in the art can understand that the above-mentioned implementation modes are specific examples for realizing the present application, and in practical applications, various changes can be made to it in form and details without departing from the spirit and spirit of the present application. scope.

Claims (9)

  1. 一种光信号损伤提取方法，包括：A method for extracting optical signal damage, comprising:
    获取接收光混频后I路和Q路的采样数据；Obtain the sampling data of the I channel and the Q channel after the received light is mixed;
    对所述I路和Q路的采样数据进行自适应补偿；其中，所述自适应补偿包括自适应接收端补偿，和/或，自适应发射端补偿；performing adaptive compensation on the sampling data of the I channel and the Q channel; wherein the adaptive compensation includes adaptive receiver compensation, and/or adaptive transmitter compensation;
    获取所述自适应补偿得到的收敛后的各均衡抽头系数；Obtain the converged equalization tap coefficients obtained by the adaptive compensation;
    根据各所述均衡抽头系数获取I路和Q路的损伤；其中，所述损伤包括与所述自适应补偿对应的接收端损伤，和/或，发射端损伤。Impairments of the I-path and the Q-path are obtained according to each of the equalization tap coefficients; wherein the impairments include impairments at the receiving end corresponding to the adaptive compensation, and/or impairments at the transmitting end.
  2. 根据权利要求1所述的光信号损伤提取方法，其中，所述根据各所述均衡抽头系数获取I路和Q路的损伤，包括：The optical signal impairment extraction method according to claim 1, wherein said obtaining the impairments of the I path and the Q path according to each said equalization tap coefficient comprises:
    对各所述均衡抽头系数进行傅里叶变换；performing a Fourier transform on each of the equalization tap coefficients;
    根据所述傅里叶变换结果分别计算I路和Q路幅角；According to the Fourier transform result, respectively calculate the I road and the Q road argument;
    对所述I路和Q路幅角分别进行频率求导得到所述I路和Q路的损伤。Frequency derivation is performed on the I-way and Q-way arguments respectively to obtain the impairments of the I-way and Q-way.
  3. 根据权利要求2所述的光信号损伤提取方法，其中，各所述均衡抽头系数包括：h xx、h xy、h yx、h yy、h xx*、h xy*、h yx*和h yy*，分别根据下式的迭代结果得到： The optical signal impairment extraction method according to claim 2, wherein each equalization tap coefficient includes: h xx , h xy , h yx , h yy , h xx* , h xy* , h yx* and h yy* , respectively according to the iterative results of the following formula:
    h xx(k+1)＝h xx(k)+μe x(k)x *(k) h xx (k+1)＝h xx (k)+μe x (k)x * (k)
    h xy(k+1)＝h xy(k)+μe x(k)y *(k) h xy (k+1)＝h xy (k)+μe x (k)y * (k)
    Figure PCTCN2022121778-appb-100001
    Figure PCTCN2022121778-appb-100001
    Figure PCTCN2022121778-appb-100002
    Figure PCTCN2022121778-appb-100002
    Figure PCTCN2022121778-appb-100003
    Figure PCTCN2022121778-appb-100003
    Figure PCTCN2022121778-appb-100004
    Figure PCTCN2022121778-appb-100004
    Figure PCTCN2022121778-appb-100005
    Figure PCTCN2022121778-appb-100005
    Figure PCTCN2022121778-appb-100006
    Figure PCTCN2022121778-appb-100006
    其中，x(k)和y(k)为输入的信号序列，x *(k)和y *(k)分别是x(k)和y(k)的共轭项，0＜μ＜1是迭代步长，e x和e y是误差准则； Among them, x(k) and y(k) are the input signal sequence, x * (k) and y * (k) are the conjugate terms of x(k) and y(k) respectively, 0<μ<1 is Iteration step size, e x and e y are error criteria;
    对各所述均衡抽头系数进行傅里叶变换，包括：Performing Fourier transform on each of the equalized tap coefficients, including:
    根据下式计算得到各所述均衡抽头系数的各傅里叶变换结果，Calculate and obtain each Fourier transform result of each described equalization tap coefficient according to the following formula,
    Figure PCTCN2022121778-appb-100007
    Figure PCTCN2022121778-appb-100007
    所述根据所述傅里叶变换结果分别计算I路和Q路幅角，包括：According to the Fourier transform results, the I-way and Q-way argument angles are calculated respectively, including:
    Figure PCTCN2022121778-appb-100008
    Figure PCTCN2022121778-appb-100008
    其中，conj(z)是复数z的共轭，arg(z)是复数z的幅角；Among them, conj(z) is the conjugate of the complex number z, and arg(z) is the argument of the complex number z;
    所述对所述I路和Q路幅角分别进行频率求导得到所述I路和Q路的损伤，包括：The frequency derivation of the I-way and the Q-way argument is respectively performed to obtain the damage of the I-way and the Q-way, including:
    Figure PCTCN2022121778-appb-100009
    其中，ω是所述角频率。
    Figure PCTCN2022121778-appb-100009
    where ω is the angular frequency.
  4. 根据权利要求1所述的光信号损伤提取方法，其中，在所述对所述I路和Q路的采样数据进行自适应补偿之前，所述方法还包括：The optical signal impairment extraction method according to claim 1, wherein, before performing adaptive compensation on the sampling data of the I-way and the Q-way, the method further comprises:
    对所述自适应接收端补偿后的I路和Q路的采样数据进行频偏补偿；performing frequency offset compensation on the sampled data of the I channel and the Q channel compensated by the adaptive receiving end;
    对所述频偏补偿后的I路和Q路的采样数据进行载波相位恢复；Carrier phase recovery is performed on the sampled data of the I channel and the Q channel after the frequency offset compensation;
    所述对所述I路和Q路的采样数据进行自适应补偿，包括：对所述I路和Q路的采样数据进行自适应发射端补偿。The performing adaptive compensation on the sampling data of the I channel and the Q channel includes: performing adaptive transmitter compensation on the sampling data of the I channel and the Q channel.
  5. 根据权利要求1至4中任一项所述的光信号损伤提取方法，其中，在所述对所述I路和Q路的采样数据进行自适应补偿后，所述方法还包括：The optical signal impairment extraction method according to any one of claims 1 to 4, wherein, after the adaptive compensation is performed on the sampling data of the I-way and the Q-way, the method further includes:
    对所述自适应补偿后的I路和Q路的采样数据进行解映射和比特差错率计算。Demapping and bit error rate calculation are performed on the sampled data of the I channel and the Q channel after the adaptive compensation.
  6. 一种光信号损伤提取装置，包括：An optical signal damage extraction device, comprising:
    模拟数字转换器，用于获取接收光混频后I路和Q路的采样数据；An analog-to-digital converter is used to obtain the sampling data of the I channel and the Q channel after the received light is mixed;
    广义线性均衡器，用于对所述I路和Q路的采样数据进行自适应补偿；其中，所述自适应补偿包括自适应接收端补偿，和/或，自适应发射端补偿；A generalized linear equalizer, configured to perform adaptive compensation on the sampling data of the I channel and the Q channel; wherein the adaptive compensation includes adaptive receiver compensation, and/or adaptive transmitter compensation;
    损伤提取模块，用于获取所述自适应补偿得到的收敛后的各均衡抽头系数，根据各所述均衡抽头系数获取I路和Q路的损伤；其中，所述损伤包括与所述自适应补偿对应的接收端损伤，和/或，发射端损伤。A damage extraction module, configured to obtain the converged equalization tap coefficients obtained by the adaptive compensation, and obtain the damage of the I path and the Q path according to each of the equalization tap coefficients; wherein, the damage includes Corresponding impairments at the receiving end, and/or impairments at the transmitting end.
  7. 根据权利要求6所述的光信号损伤提取装置，其中，所述装置还包括：The optical signal impairment extraction device according to claim 6, wherein the device further comprises:
    频偏补偿器，用于对所述自适应接收端补偿后的I路和Q路的采样数据进行频偏补偿；A frequency offset compensator, configured to perform frequency offset compensation on the sampled data of the I channel and the Q channel compensated by the adaptive receiving end;
    载波相位恢复模块，用于对所述频偏补偿后的I路和Q路的采样数据进行载波相位恢复。The carrier phase recovery module is used to recover the carrier phase of the sampled data of the I channel and the Q channel after the frequency offset compensation.
  8. 一种电子设备，包括：An electronic device comprising:
    至少一个处理器；at least one processor;
    与所述至少一个处理器通信连接的存储器；memory communicatively coupled to the at least one processor;
    所述存储器存储有可被所述至少一个处理器执行的指令，所述指令被所述至少一个处理器执行，以使所述至少一个处理器能够执行如权利要求1至5中任一项所述的光信号损伤提取方法。The memory stores instructions executable by the at least one processor, the instructions are executed by the at least one processor, so that the at least one processor can perform the operation described in any one of claims 1 to 5 The optical signal damage extraction method described above.
  9. 一种计算机可读存储介质，存储有计算机程序，其中，所述计算机程序被处理器执行时实现如权利要求1至5中任一项所述的光信号损伤提取方法。A computer-readable storage medium storing a computer program, wherein when the computer program is executed by a processor, the optical signal damage extraction method according to any one of claims 1 to 5 is realized.
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CN117675157B (en) * 2024-02-02 2024-05-28 北京融为科技有限公司 Self-adaptive IQ delay compensation method and device for transmitting end

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