Signal restoration method, device and equipment based on MIMO parallel, and medium
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-12-17
- Publication Date
- 2026-04-10
Smart Images
Figure CN121841479A_ABST
Abstract
Description
Technical Field
[0001] This invention relates to the field of fiber optic signal repair, and in particular to a signal repair method, apparatus, terminal device, and storage medium based on MIMO parallelism. Background Technology
[0002] With the rapid development of emerging information technologies such as large language models and cloud computing, the scale of global computing power networking and data transmission has experienced explosive growth. Space division multiplexing (SDM) optical fiber communication technology has become one of the key solutions to break through the capacity bottleneck of traditional single-mode optical fibers. However, SDM optical fiber parallel mode channels inevitably suffer from channel impairments such as inter-mode crosstalk and mode dispersion.
[0003] Currently, multi-input multi-output (MIMO) digital signal processing (DSP) is commonly used to address this issue. However, as the number of spatial multiplexing channels and distances are further expanded, the computational complexity and hardware overhead of MIMO-DSP increase rapidly, gradually becoming the main sources of system energy consumption, latency, and cost. This makes it difficult to meet the requirements of future ultra-high-capacity spatial multiplexing fiber optic communication systems to achieve low-latency real-time data transmission under strict energy consumption constraints. Although some research has attempted to preprocess the signal directly in the optical domain to reduce the electrical domain burden, such as by using specially designed optical filters or lattice-like structures, these solutions are often limited to specific channel conditions and have significant optical losses or hardware redundancy. Summary of the Invention
[0004] This invention provides a signal repair method, apparatus, terminal device, and storage medium based on MIMO parallelism, which can solve the above-mentioned problems and improve the reliability of fiber optic signal repair.
[0005] This invention provides a signal repair method based on MIMO parallelism, comprising: Obtain the damaged signal in the target optical fiber, the number of fiber channels, and the filter order; The number of MISO equalizers and their connection numbers are determined based on the number of fiber channels and the filter order. Based on the connection sequence number of the MISO equalizer, the MISO equalizers corresponding to the number of MISO equalizers are connected to obtain a multiple-input multiple-output optical MIMO equalizer. The damaged signal in the optical fiber transmission is repaired based on the multi-input multi-output optical MIMO equalization filter to obtain a complete optical transmission signal; The method for constructing the MISO equalization filter is as follows: Based on the number of fiber channels and the connection sequence of the MISO equalization filter, the pre-acquired optical delay line and interferometer are constructed into a unit delay component; The interferometer is constructed as a unit interferometer component based on the number of fiber optic channels; Based on the filter order, several of the unit delay components are connected sequentially to obtain an intermediate delay component; The output of the intermediate delay component is connected to the input of the unit interference component to obtain the MISO equalization filter.
[0006] In the above scheme, the construction process of the MISO equalization filter is closely integrated with the number of fiber channels, the channel order, and its own connection sequence. The optical delay line and interferometer are modularly integrated into unit delay components and unit interference components. Then, the unit delay components dominated by the channel order are cascaded to form intermediate delay components, and finally the assembly of the MISO equalization filter is completed. This modular construction method can specifically offset the multi-channel crosstalk and signal time difference generated during fiber optic transmission. Through the step-by-step signal separation, phase alignment, and interference suppression of multi-stage MISO equalization filters, it is ensured that the impurity components in the damaged signal are completely filtered out. The final output optical transmission complete signal has the characteristics of no crosstalk, strong synchronization, and high fidelity, which improves the reliability of fiber optic signal repair and thus improves the quality and reliability of fiber optic signal transmission.
[0007] Furthermore, the process of constructing the pre-acquired optical delay line and interferometer into a unit delay component based on the number of fiber channels and the connection sequence number of the MISO equalization filter includes: The number of interferometers in the unit delay component is obtained based on the difference between the number of fiber channels and the connection sequence number of the MISO equalization filter. The interferometers are connected sequentially based on the number of interferometers in the unit delay component to obtain an interference unit; The output end of the interference unit is connected to the input end of the optical delay line to obtain the unit delay component.
[0008] In the above scheme, the number of interferometers in the unit delay component is precisely determined by the difference between the number of fiber optic channels and the connection sequence number of the MISO equalizer filter. The interferometers are then sequentially connected to form interferometric units, which are then connected to the optical delay line. This construction logic achieves modular and precise assembly of the unit delay component. This design ensures that the channel adaptability of the interferometric units perfectly matches the number of channels in the current MISO equalizer filter, guaranteeing that the optical signal can be stably transmitted along the preset path and through the optical delay line, reliably achieving the unit delay function.
[0009] Further, the step of sequentially connecting several of the unit delay components based on the filter order to obtain an intermediate delay component includes: The difference between the filter order and the preset order is obtained as the number of unit delay components; The unit delay components are connected sequentially based on the number of unit delay components to obtain the intermediate delay component.
[0010] In the above scheme, the number of unit delay components is determined based on the difference between the filter order and the preset order. Intermediate delay components are then constructed by connecting them sequentially, ensuring that the delay capability of the intermediate delay components is precisely matched to the filter order. This design allows the intermediate delay components to fully cover all target delay terms, ensuring that the MIMO equalization filter can specifically compensate for signal time differences during fiber optic transmission.
[0011] Furthermore, the repair of damaged signals in optical fiber transmission based on the multiple-input multiple-output optical MIMO equalization filter to obtain a complete optical transmission signal includes: Acquire calibration signal; The MIMO equalization filter is calibrated based on the calibration signal to obtain the calibrated MIMO equalization filter. The damaged signal in the optical fiber transmission is repaired by the calibrated multiple-input multiple-output optical MIMO equalization filter to obtain the complete optical transmission signal.
[0012] The above scheme effectively improves the accuracy and reliability of signal repair by acquiring calibration signals, calibrating the MIMO equalization filter, and then repairing the damaged signal in the fiber optic transmission.
[0013] Further, the step of calibrating the MIMO equalizer based on the calibration signal to obtain the calibrated MIMO equalizer includes: The MISO equalizer is selected sequentially from the multiple input multiple output optical MIMO equalizers as the current MISO equalizer. The calibration signal is input to the current MISO equalizer, and the current MISO equalizer is calibrated based on the calibration signal. This process is repeated until all the MISO equalizers have been polled, resulting in the calibrated multiple input multiple output optical MIMO equalizer.
[0014] In the above scheme, MISO equalizers are selected sequentially as the current MISO equalizers, and calibration signals are input and polled for calibration, achieving hierarchical and precise calibration of MIMO equalizers. Selecting the current MISO equalizer in a specific order and inputting calibration signals individually avoids calibration interference between different MISO equalizers, ensuring that the calibration process for each MISO equalizer is independent and accurate. The polling calibration logic covers all MISO equalizers in the MIMO equalizer system, ensuring that the operating state of each level of MISO equalizer reaches its optimal level. This guarantees deep adaptation of the overall transmission characteristics of the MIMO equalizer to the fiber optic channel, significantly improving the consistency and stability of multi-channel signal restoration, and effectively solving the local deviation problem that easily occurs in traditional overall calibration methods.
[0015] Further, the step of sequentially selecting the MISO equalizer from the multiple-input multiple-output optical MIMO equalizers as the current MISO equalizer, inputting the calibration signal to the current MISO equalizer, and calibrating the current MISO equalizer based on the calibration signal, until all the MISO equalizers have been polled, to obtain the calibrated multiple-input multiple-output optical MIMO equalizer, includes: Obtain the operating status of the interferometer of the unit delay component in the current MISO equalization filter; The unit delay component or the unit interference component is selected sequentially from the current MISO equalization filter as the current calibration component. The calibration signal is input to the current MISO equalization filter, and the current calibration component in the current MISO equalization filter is calibrated based on the calibration signal and the working state until the unit interference component and all the unit delay components are polled to obtain the calibrated current MISO equalization filter.
[0016] In the above scheme, by acquiring the interferometer operating status of the unit delay components in the current MISO equalizer filter, and sequentially selecting either the unit delay components or the unit interferometer components as the current calibration components for targeted calibration, comprehensive and accurate calibration of the core components inside the MISO equalizer filter is achieved. This design covers the calibration range to the key functional components of the MISO equalizer filter, ensuring that the delay function of the unit delay components and the path gating function of the unit interferometer components are both in optimal condition. Simultaneously, based on the collaborative calibration logic of the calibration signal and the interferometer operating status, the parameter deviations of each component can be accurately located and corrected, avoiding overall performance shortcomings caused by insufficient calibration of a single component, and significantly improving the signal processing accuracy of the MISO equalizer filter.
[0017] Further, in the step of sequentially selecting the unit delay component or the unit interference component from the current MISO equalizer filter as the current calibration component, inputting the calibration signal to the current MISO equalizer filter, and calibrating the current calibration component in the current MISO equalizer filter based on the calibration signal and the operating state, until all unit interference components and all unit delay components have been polled to obtain the calibrated current MISO equalizer filter, the step of calibrating the current calibration component in the current MISO equalizer filter based on the calibration signal and the operating state includes: Update the operating state of the interferometer in the current calibration component to the cross state; The calibration signal is input to the current calibration component based on the crossover state; The parameters of the interferometer in the current calibration component are adjusted based on the calibration signal until the amplitude of the output delay term of the current MISO equalization filter reaches a preset amplitude value, thus obtaining the calibrated current calibration component. Update the operating state of the interferometer in the current calibration component to the through state.
[0018] In the above scheme, the calibration process—inputting the calibration signal in a cross-state, adjusting the interferometer parameters until the output delay term amplitude reaches a preset value, and then switching to a through-state—achieves accurate and efficient calibration of the current calibration component. Switching the interferometer to the cross-state ensures that the calibration signal is transmitted entirely along the target path, avoiding calibration deviations caused by signal leakage. Adjusting the interferometer parameters based on the calibration signal and targeting a preset amplitude value optimizes the delay response or path selection function of the current calibration component. Switching to the through-state after calibration effectively bypasses the calibrated component, preventing interference with the calibration of subsequent components. This process ensures both the calibration accuracy of individual calibration components and the orderliness and efficiency of the overall calibration process.
[0019] Another embodiment of the present invention also provides a signal repair device based on MIMO parallelism, comprising: The acquisition module is used to acquire the damaged signal in the fiber transmission of the target fiber, the number of fiber channels, and the filter order. The determination module is used to determine the number of MISO equalizers and the connection sequence number of the MISO equalizers based on the number of fiber channels and the filter order. A multiple-input multiple-output optical MIMO equalization filter construction module is used to connect the MISO equalization filters corresponding to the number of MISO equalization filters based on the connection sequence number of the MISO equalization filters, so as to obtain a multiple-input multiple-output optical MIMO equalization filter. The repair module is used to repair the damaged signal in the optical fiber transmission based on the multiple-input multiple-output optical MIMO equalization filter, so as to obtain the complete optical transmission signal. The determining module includes: The unit delay component construction module is used to construct the pre-acquired optical delay line and interferometer into a unit delay component based on the number of optical fiber channels and the connection sequence number of the MISO equalization filter; A unit interference component construction module is used to construct the interferometer into a unit interference component based on the number of fiber channels; An intermediate delay component construction module is used to connect several of the unit delay components sequentially based on the filter order to obtain an intermediate delay component; The MISO equalization filter construction module is used to connect the output of the intermediate delay component to the input of the unit interference component to obtain the MISO equalization filter.
[0020] Another embodiment of the present invention provides a terminal device, including: a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, it implements the steps of the MIMO-based parallel signal repair method of the present invention.
[0021] Another embodiment of the present invention provides a computer-readable storage medium item, including: a stored computer program, which, when the computer program is running, controls the device where the computer-readable storage medium is located to perform the steps of a MIMO-based parallel signal repair method of the present invention. Attached Figure Description
[0022] To more clearly illustrate the technical solution of this application, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.
[0023] Figure 1 This is a flowchart illustrating a MIMO-based parallel signal repair method according to an embodiment of the present invention. Figure 2 This is a schematic diagram of a signal repair device based on MIMO parallelism provided in an embodiment of the present invention; Figure 3 This is a schematic diagram of the structure of a unit delay component provided in an embodiment of the present invention; Figure 4 This is a schematic diagram of the structure of a MISO equalizer provided in an embodiment of the present invention; Figure 5This is a schematic diagram of the structure of a multiple-input multiple-output optical MIMO equalization filter provided in an embodiment of the present invention; Figure 6 This is a schematic diagram of the calibration of each MISO equalization filter in a multiple-input multiple-output optical MIMO equalization filter provided in an embodiment of the present invention; Figure 6 (a) is a calibration schematic diagram of the first unit delay component provided in an embodiment of the present invention; Figure 6 (b) is a calibration schematic diagram of the second unit delay component provided in an embodiment of the present invention; Figure 6 (c) is a calibration schematic diagram of a unit interference component provided in an embodiment of the present invention; Figure 6 (d) is a schematic diagram of the current MISO equalization filter after calibration according to an embodiment of the present invention. Detailed Implementation
[0024] To make the objectives, technical solutions, and advantages of this application clearer, the technical solutions of this application will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.
[0025] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains; the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the application; the terms “comprising” and “having”, and any variations thereof, in the specification, claims, and foregoing description of the drawings are intended to cover non-exclusive inclusion.
[0026] In the description of the embodiments of this application, technical terms such as "first" and "second" are used only to distinguish different objects and should not be construed as indicating or implying relative importance or implicitly specifying the number, specific order, or primary and secondary relationship of the indicated technical features. In the description of the embodiments of this application, "multiple" means two or more, unless otherwise explicitly defined.
[0027] In this document, the term "embodiment" means that a particular feature, structure, or characteristic described in connection with an embodiment may be included in at least one embodiment of this application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor is it a separate or alternative embodiment mutually exclusive with other embodiments. It will be explicitly and implicitly understood by those skilled in the art that the embodiments described herein can be combined with other embodiments.
[0028] In the description of the embodiments in this application, the term "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, and B existing alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.
[0029] In the description of the embodiments of this application, the term "multiple" refers to two or more (including two), similarly, "multiple sets" refers to two or more (including two sets), and "multiple pieces" refers to two or more (including two pieces).
[0030] In the description of the embodiments of this application, unless otherwise expressly specified and limited, technical terms such as "installation," "connection," "joining," and "fixing" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. For those skilled in the art, the specific meaning of the above terms in the embodiments of this application can be understood according to the specific circumstances.
[0031] See Figure 1 To address the aforementioned problems and improve the reliability of fiber optic signal repair, an embodiment of the present invention provides a MIMO-based parallel signal repair method, comprising: Step S1: Obtain the damaged fiber transmission signal, number of fiber channels, and filter order of the target optical fiber; Step S2: Determine the number of MISO equalizers and their connection sequence numbers based on the number of fiber channels and the filter order; Step S3: Connect the MISO equalizers corresponding to the number of MISO equalizers based on the connection sequence number of the MISO equalizers to obtain a multiple-input multiple-output optical MIMO equalizer. Step S4: Repair the damaged signal in the optical fiber transmission based on the multiple-input multiple-output optical MIMO equalization filter to obtain the complete optical transmission signal; The method for constructing the MISO equalizer is as follows: Step S31: Based on the number of fiber channels and the connection sequence of the MISO equalization filter, construct the pre-acquired optical delay line and interferometer into a unit delay component; Step S32: Construct the interferometer into a unit interferometer component based on the number of fiber channels; Step S33: Connect several unit delay components sequentially based on the filter order to obtain intermediate delay components; Step S34: Connect the output of the intermediate delay component to the input of the unit interference component to obtain the MISO equalization filter.
[0032] In the above scheme, the construction process of the MISO equalization filter is closely integrated with the number of fiber channels, the channel order, and its own connection sequence. The optical delay line and interferometer are modularly integrated into unit delay components and unit interference components. Then, the unit delay components dominated by the channel order are cascaded to form intermediate delay components, and finally the assembly of the MISO equalization filter is completed. This modular construction method can specifically offset the multi-channel crosstalk and signal time difference generated during fiber optic transmission. Through the step-by-step signal separation, phase alignment, and interference suppression of multi-stage MISO equalization filters, it is ensured that the impurity components in the damaged signal are completely filtered out. The final output optical transmission complete signal has the characteristics of no crosstalk, strong synchronization, and high fidelity, which improves the reliability of fiber optic signal repair and thus improves the quality and reliability of fiber optic signal transmission.
[0033] It should be noted that the MISO equalizer (Multiple-Input Single-Output) is a multi-input single-output filter system.
[0034] It should be noted that the implementation of the multiple-input multiple-output optical MIMO equalization filter is based on a pseudo-unitary mathematical model. The application of the pseudo-unitary mathematical model in this method is explained in detail below: The transmission matrix H [ z The "degree" (or McMillan degree) is defined as the minimum number of delay units required to describe a filter system (i.e., The number of [something] corresponds to the number of optical delay lines); for the transmission matrix of the target optical fiber... H [ z Its degree satisfies (in The degree measure represents the highest degree term of the polynomial, and its range is [value missing]. (M is the number of fiber optic channels, (where is the filter order). The overall system consisting of the target fiber and the MIMO equalization filter conforms to the pseudo-unitary constraint, therefore its degree is... The MIMO equalizer filter, acting as an equalizer, has a degree (i.e., the total number of delay units it contains = the number of optical delay lines) equal to the overall system degree minus the degree of the target fiber transmission matrix. ; And this degree satisfies This also corresponds to the maximum number of optical delay lines deployed in the multi-input multi-output optical MIMO equalization filter, which is the core theoretical basis for the design of the MISO equalization filter and the number of unit delay components.
[0035] It should be noted that the number of MISO equalizers is (M-1), where M is the number of fiber optic channels. The connection sequence number of each MISO equalizer corresponds to the number of signal channels m it is currently processing. The value of m decreases by 1 from the number of fiber optic channels M until it reaches 2. That is, the number of channels m corresponding to the MISO equalizer with connection sequence number n (n is a positive integer, 1≤n≤M-1) is M=M-n+1. Then, based on the connection sequence number of each MISO equalizer, the MISO equalizers corresponding to the number of MISO equalizers are connected to obtain a multiple-input multiple-output optical MIMO equalizer. Furthermore, the MISO equalizers are connected in a cascaded manner, and this cascaded architecture conforms to the quasi-unitary constraint, ensuring that the transmission matrix of the multiple-input multiple-output optical MIMO equalizer and the target fiber is... H [ z The overall system transmission matrix constituted by ] satisfies ,in, This is the transmission matrix of the multiple-input multiple-output optical MIMO equalization filter. It is the anti-diagonal identity matrix. The filter order is given. The interferometer is specifically a Mach-Zehnder interferometer (MZI), and the function of the unit delay component is to achieve a unit delay. Furthermore, the unit interference component is an MZI unit column, containing (n-1) MZI units, where n is the connection number of the current MISO equalization filter. This MZI unit column is used to achieve signal path selection. Furthermore, the number of the plurality of unit delay components is... One, of which The filter order is specified, and the sequential connection method is cascaded, allowing the intermediate delay components to cover the filter order from... arrive The delay term is included. The resulting MIMO equalization filter is simpler and less expensive than existing MIMO filters.
[0036] In another embodiment, the process of constructing the pre-acquired optical delay line and interferometer into a unit delay component based on the number of fiber channels and the connection sequence number of the MISO equalization filter includes: The number of interferometers in the unit delay component is obtained based on the difference between the number of fiber channels and the connection sequence number of the MISO equalization filter. The interferometers are connected sequentially based on the number of interferometers in the unit delay component to obtain an interference unit; The output end of the interference unit is connected to the input end of the optical delay line to obtain the unit delay component.
[0037] It should be noted that the number of interferometers in the unit delay component is specifically Mn, where M is the number of fiber optic channels and n is the connection sequence number of the current MISO equalization filter. The connection sequence number and the number of fiber optic channels represent the number of channels corresponding to the current MISO equalization filter, m = M - n + 1, to accommodate the path selection requirements of m signal channels. Based on the number of interferometers in the unit delay component, the interferometers are connected sequentially to obtain an interferometric unit. The interferometric unit is an MZI unit column, and adjacent interferometers achieve signal transmission and path switching through signal path connection points. The output end of the interferometric unit is connected to the input end of the optical delay line to obtain the unit delay component. The signal path of the unit delay component must satisfy the following condition: when all MZIs in the interferometric unit are in a cross-state, the input signal can propagate completely along the downward path and pass through the optical delay line, thereby achieving unit delay.
[0038] In another embodiment, the step of sequentially connecting a plurality of the unit delay components based on the filter order to obtain an intermediate delay component includes: The difference between the filter order and the preset order is obtained as the number of unit delay components; The unit delay components are connected sequentially based on the number of unit delay components to obtain the intermediate delay component.
[0039] It should be noted that the preset order difference is 1, therefore the specific number of the unit delay components is as follows: One, of which This refers to the filter order, which is related to the number of MISO equalizers in the scheme. The technical features of each unit delay component are consistent. The total number of the unit delay components (i.e., the total number of unit delay components contained in all MISO equalization filters) corresponds to the number of delay units (i.e., the number of optical delay lines) of the MIMO equalization filter, and according to the degree constraint of the transmission matrix, this number must satisfy a condition that does not exceed a certain limit. This constraint is contained in each MISO equalizer filter. Each unit delay component, and deployed in total The architecture design of the MISO equalizer is implemented to ensure that the multiple-input multiple-output optical MIMO equalizer meets the descrambling requirements of the simulacrum channel (descrambling is the inverse process of restoring the scrambled signal to the original signal in digital communication) and also meets the theoretical design goal of minimizing delay units.
[0040] Specifically, refer to Figure 3 , Figure 4 and Figure 5 The connection relationships of the multiple-input multiple-output optical MIMO equalization filter are explained in detail: refer to Figure 5 M represents the number of fiber optic channels, containing M-1 MISO equalizers; the nth MISO equalizer corresponds to the number of channels. =M-n+1, the number of channels corresponding to the (n+1)th MISO equalization filter. =Mn. A multiple-input multiple-output (MIMO) optical equalizer consists of M-1 sequentially connected MISO equalizers, each with its own input and output terminals corresponding to the number of channels; the nth MISO equalizer... The output terminal is connected to the (n+1)th MISO equalizer filter. Each input terminal is connected in a one-to-one correspondence; the first MISO equalizer filter =M input terminals, serving as the M input terminals of the multiple-input multiple-output optical MIMO equalization filter, used to connect to damaged signals transmitted through optical fibers; the (M-1)th MISO equalization filter... =Two output terminals, serving as the output terminals of a multiple-input multiple-output optical MIMO equalization filter, used to output the complete optical transmission signal.
[0041] refer to Figure 4 For the nth MISO equalization filter, it includes a unit interference component and an intermediate delay component, the intermediate delay component including ( The system comprises (M-n+1) sequentially connected unit delay components, (M-n+1) input terminals, and (M-n+1) output terminals. The unit interference component has (M-n+1) input terminals and (M-n+1) output terminals, wherein: the (M-n+1) input terminals of the intermediate delay component serve as the input terminals of the MISO equalization filter; the (M-n+1) output terminals of the intermediate delay component are connected to the (M-n+1) input terminals of the interference unit; and the (M-n+1) output terminals of the unit interference component serve as the output terminals of the MISO equalization filter.
[0042] refer to Figure 4For the intermediate delay component of the nth MISO equalizer, m = M - n + 1 is the number of channels in the current MISO equalizer. This refers to the filter order. The intermediate delay components include... There are several sequentially connected unit delay components, each with m input terminals and m output terminals; the i-th unit (i is 1 to m) has m input terminals and m output terminals. The m outputs of the unit delay component (a positive integer of 2) are connected one-to-one with the m inputs of the (i+1)th unit delay component; the m inputs of the first unit delay component are used as the m inputs of the intermediate delay components; and the m outputs of the last unit delay component are used as the m outputs of the intermediate delay components.
[0043] refer to Figure 4 For the unit interference component of the nth MISO equalizer filter, m = M - n + 1 is the number of channels of the current MISO equalizer filter. The unit interference component is an MZI unit column composed of m-1 (i.e., Mn) interferometers (MZI) connected in sequence, with m (i.e., M - n + 1) input terminals and m (i.e., M - n + 1) output terminals. Connection relationship: adjacent interferometers are connected through signal path connection points. The unit interference component is set with m input terminals as its signal input ports. The unit interference component is set with m output terminals as its signal output ports.
[0044] refer to Figure 3 For the unit delay component of the nth MISO equalizer filter, m = M - n + 1 represents the number of channels in the current MISO equalizer filter. The unit delay component includes interferometer units (MZI unit columns) and optical delay lines. Specifically: the interferometer unit consists of m-1 (i.e., Mn) interferometers (MZIs) connected sequentially, with m input terminals and m output terminals; the optical delay line has one input terminal and one output terminal; the input terminal of the interferometer unit serves as the input terminal of the unit delay component; the pre-output terminal of the interferometer unit is connected to the input terminal of the optical delay line; the output terminal of the optical delay line and the remaining output terminals of the interferometer unit together serve as the output terminal of the unit delay component. Figure 3 The yellow dots in the diagram represent the connection points of the interferometer.
[0045] In another embodiment, the repair of damaged signals in fiber optic transmission based on the multiple-input multiple-output optical MIMO equalization filter to obtain a complete optical transmission signal includes: Acquire calibration signal; The MIMO equalization filter is calibrated based on the calibration signal to obtain the calibrated MIMO equalization filter. The damaged signal in the optical fiber transmission is repaired by the calibrated multiple-input multiple-output optical MIMO equalization filter to obtain the complete optical transmission signal.
[0046] It should be noted that the calibration process relies on the architecture of the multiple-input multiple-output optical MIMO equalization filter and is performed separately for each MISO equalization filter; the damaged signal of the optical fiber transmission is repaired based on the calibrated multiple-input multiple-output optical MIMO equalization filter to obtain the complete optical transmission signal.
[0047] In another embodiment, calibrating the MIMO equalizer based on the calibration signal to obtain the calibrated MIMO equalizer includes: The MISO equalizer is selected sequentially from the multiple input multiple output optical MIMO equalizers as the current MISO equalizer. The calibration signal is input to the current MISO equalizer, and the current MISO equalizer is calibrated based on the calibration signal. This process is repeated until all the MISO equalizers have been polled, resulting in the calibrated multiple input multiple output optical MIMO equalizer.
[0048] It should be noted that the reference Figure 6 The selection order of the current MISO equalizer is as follows: starting with the MISO equalizer with m=M channels, select MISO equalizers with m decreasing by 1 sequentially, until the MISO equalizer with m=2 channels is selected. This means m=M-n+1, where n is the connection number of the current MISO equalizer. When inputting the calibration signal, a vector needs to be input at each of the m input terminals of the current MISO equalizer. That is, the calibration signal is input only at the first input port, with no signal at the other input ports, and the signal is probed at the last output of the current MISO equalizer to obtain the time-domain response; and after the calibration of the current MISO equalizer is completed, the operating state of all interferometers (MZI) in the first row of the MISO equalizer needs to be updated to the through state, so that the input signal can bypass the calibrated current MISO equalizer and input the vector to the next MISO equalizer to be calibrated. .
[0049] In another embodiment, the step of sequentially selecting the MISO equalizer from the multiple-input multiple-output (MIMO) optical equalizers as the current MISO equalizer, inputting the calibration signal to the current MISO equalizer, and calibrating the current MISO equalizer based on the calibration signal, until all the MISO equalizers have been polled, to obtain the calibrated MIMO optical equalizer, includes: Obtain the operating status of the interferometer of the unit delay component in the current MISO equalization filter; The unit delay component or the unit interference component is selected sequentially from the current MISO equalization filter as the current calibration component. The calibration signal is input to the current MISO equalization filter, and the current calibration component in the current MISO equalization filter is calibrated based on the calibration signal and the working state until the unit interference component and all the unit delay components are polled to obtain the calibrated current MISO equalization filter.
[0050] It should be noted that the reference Figure 6 The unit delay component Where m is the number of channels in the current MISO equalizer filter = M-n+1, and i is the serial number of the unit delay component (the value of i ranges from 1 to...). , (where i is the filter order); the interferometer's operating states include a crossover state and a through state. The crossover state guides the signal through the optical delay line, and the through state guides the signal around the calibrated unit delay component. The order of selecting the current calibration component is to start with the unit delay component with index i=1, and then select unit delay components with index i increasing sequentially, until the unit delay component with index i=1 is selected. The unit delay component; then select the unit interference component; the time domain response of the current MISO equalization filter output includes The items correspond to those that did not pass the delay line to those that passed all the delay lines. The signal components of the delay line.
[0051] In another embodiment, the step of sequentially selecting the unit delay component or the unit interference component from the current MISO equalizer as the current calibration component, inputting the calibration signal to the current MISO equalizer, and calibrating the current calibration component in the current MISO equalizer based on the calibration signal and the operating state, until all unit interference components and all unit delay components have been polled to obtain the calibrated current MISO equalizer, includes the following step: calibrating the current calibration component in the current MISO equalizer based on the calibration signal and the operating state. Update the operating state of the interferometer in the current calibration component to the cross state; The calibration signal is input to the current calibration component based on the crossover state; The parameters of the interferometer in the current calibration component are adjusted based on the calibration signal until the amplitude of the output delay term of the current MISO equalization filter reaches a preset amplitude value, thus obtaining the calibrated current calibration component. Update the operating state of the interferometer in the current calibration component to the through state.
[0052] It should be noted that the reference Figure 6 The purpose of updating the interferometer to a cross state is to guide the input signal to propagate completely along the downward path, passing through the optical delay lines present in the current calibration component. If the interferometer is not in a perfect cross state, signal components will leak directly to the next interferometer unit, failing to traverse all the optical delay lines. The optical delay line causes the response of the corresponding delay term to not reach its maximum. Then, based on the cross-state, the calibration signal is input to the current calibration component; based on the calibration signal, the parameters of the interferometer in the current calibration component are adjusted until the amplitude of the output delay term of the current MISO equalization filter reaches a preset amplitude value, thus obtaining the calibrated current calibration component: the output delay term is the target delay term corresponding to the current calibration component's sequence number; when the current calibration component is a unit delay component with sequence number i=1, the target delay term is... When the current calibration component is the unit delay component with serial number i=2, the target delay term is: Similarly, when the current calibration component is a unit interference assembly, the target delay term is... (No delay term); the preset amplitude value is the maximum amplitude value of the corresponding target delay term. The interferometer parameters are adjusted by controlling each interferometer unit from top to bottom, and each adjustment maximizes the response amplitude of the target delay term. Then, the working state of the interferometer in the current calibration component is updated to the through state. Updating the interferometer of the current calibration component to the through state is to allow subsequent calibration signals to bypass the already calibrated current calibration component and be directly input into the next unit delay component or unit interferometer component to be calibrated, thus avoiding interference from the already calibrated component to the subsequent calibration process.
[0053] The following are Figure 6 A detailed explanation will be provided: Figure 6 The orange line on the left indicates the transmission path of the optical signal in the current calibration step; the green checkmark indicates that the MZI has been adjusted to the correct working state (cross state / straight-through state); the arrow on the left is the calibration signal input terminal, and the arrow on the right is the calibration signal output terminal. Figure 6 The right side is the time-domain response area, in which , … This is a combination of delay terms used to identify the signal delay components covered by the current step.
[0054] Figure 6 In the diagram, (a) represents the initial calibration state of the first unit delay component. The signal is input from the first input port on the left, and the orange path corresponds to the signal path of the first unit delay component (which is used as the current calibration component). At this time, a green checkmark is marked next to part of the MZI of this unit delay component (representing the initial configuration), and it is connected to an orange optical delay line, flowing through the first optical delay line and other optical delay lines. Figure 6 The diagram on the right shows the target delay item (corresponding to...). The response intensity of the first unit delay component has reached its maximum, the response of the remaining delay terms is suppressed, the response intensity of the subsequent units is set to zero, and the calibration of the first unit delay component is completed.
[0055] Figure 6 (b) in the diagram represents the calibration completion state of the first unit delay component. Calibration of the second unit delay component begins (using it as the current calibration component). At this point, the MZI of the calibrated first unit delay component switches to the through state. Figure 6 The signal path bypasses the gray area (the middle one turns gray), and the MZI of the second unit delay component signal switches to a cross state and is guided from the second orange optical delay line through the other optical delay lines. At this time... Figure 6 The diagram on the right shows the target delay item (corresponding to...). The response intensity of the first element has reached its maximum, the response of the remaining delay terms is suppressed, the response intensity of the subsequent elements is set to zero, and the calibration of the second element delay component is completed.
[0056] Figure 6 (c) in the diagram represents stage (c): Calibration of the unit interference components in the current MISO equalization filter begins, at which point the MZI of the previously calibrated unit delay components switches to the pass-through state. Figure 6 (When the signal path bypasses the orange path, the MZI of the element interference component switches to a cross state, and the signal flows through the element interference component via the orange path.) At this time... Figure 6 The diagram on the right shows the target delay term. The response intensity has reached its maximum, the responses of the remaining delay terms are suppressed, the response intensity of the subsequent terms is set to zero, and the calibration of the unit interference component is completed.
[0057] Figure 6In the diagram, (d) represents the final calibration state of the current MISO equalizer filter. All delay components within the current MISO equalizer filter have completed calibration, and their MZI values have all switched to pass-through (the orange path bypasses all calibrated components). The process then proceeds to the next stage of the MISO equalizer filter calibration process, with all optical delay lines in a configured state. In the output time domain response of the current MISO equalizer filter, the responses of all target delay terms have been adjusted to their optimal state, and the process can proceed to the next stage of calibration.
[0058] like Figure 2 As shown, based on the above method embodiments, corresponding apparatus embodiments are provided; An embodiment of the present invention provides a signal repair device based on MIMO parallelism, comprising: The acquisition module is used to acquire the damaged signal in the fiber transmission of the target fiber, the number of fiber channels, and the filter order. The determination module is used to determine the number of MISO equalizers and the connection sequence number of the MISO equalizers based on the number of fiber channels and the filter order. The multiple input multiple output optical MIMO equalization filter module is used to connect the MISO equalization filters corresponding to the number of MISO equalization filters based on the connection sequence number of the MISO equalization filters, so as to obtain a multiple input multiple output optical MIMO equalization filter. The repair module is used to repair the damaged signal in the optical fiber transmission based on the multiple-input multiple-output optical MIMO equalization filter, so as to obtain the complete optical transmission signal. The determining module includes: The unit delay component construction module is used to construct the pre-acquired optical delay line and interferometer into a unit delay component based on the number of optical fiber channels and the connection sequence number of the MISO equalization filter; A unit interference component construction module is used to construct the interferometer into a unit interference component based on the number of fiber channels; An intermediate delay component construction module is used to connect several of the unit delay components sequentially based on the filter order to obtain an intermediate delay component; The MISO equalization filter construction module is used to connect the output of the intermediate delay component to the input of the unit interference component to obtain the MISO equalization filter.
[0059] It is understood that the above-described device embodiments correspond to the method embodiments of the present invention, and can implement the MIMO-based parallel signal repair method provided by any of the above-described method embodiments of the present invention.
[0060] It should be noted that the device embodiments described above are merely illustrative, and some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs. Furthermore, in the accompanying drawings of the device embodiments provided by this invention, the connection relationships between modules indicate that they have communication connections, which can specifically be implemented as one or more communication buses or signal lines. Those skilled in the art can understand and implement this without any creative effort.
[0061] Based on the above embodiment of a MIMO-based parallel signal repair method, another embodiment of the present invention provides a terminal device, which includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor. When the processor executes the computer program, it implements a MIMO-based parallel signal repair method according to any embodiment of the present invention.
[0062] For example, in this embodiment, the computer program can be divided into one or more modules, which are stored in the memory and executed by the processor to complete the present invention. The one or more modules may be a series of computer program instruction segments capable of performing a specific function, which describe the execution process of the computer program in the terminal device.
[0063] The terminal device may be a desktop computer, laptop, handheld computer, or cloud server, etc. The terminal device may include, but is not limited to, a processor and a memory.
[0064] The processor can be a Central Processing Unit (CPU), or other general-purpose processors, digital signal processors (DSPs), application-specific integrated circuits (ASICs), field-programmable gate arrays (FPGAs), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor can be a microprocessor or any conventional processor. The processor is the control center of the terminal device, connecting all parts of the terminal device via various interfaces and lines.
[0065] Based on the above-described method embodiments, another embodiment of the present invention provides a computer-readable storage medium including a stored computer program, wherein, when the computer program is executed, it controls the device where the computer-readable storage medium is located to execute a MIMO-based parallel signal repair method as described in any of the above-described method embodiments of the present invention.
[0066] The modules / units integrated in the device / terminal equipment, if implemented as software functional units and sold or used as independent products, can be stored in a computer-readable storage medium. Based on this understanding, all or part of the processes in the above embodiments of the present invention can also be implemented by a computer program instructing related hardware. The computer program can be stored in a computer-readable storage medium, and when executed by a processor, it can implement the steps of the various method embodiments described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files, or certain intermediate forms. The computer-readable medium can include: any entity or device capable of carrying the computer program code, a recording medium, a USB flash drive, a portable hard drive, a magnetic disk, an optical disk, a computer memory, a read-only memory (ROM), a random access memory (RAM), an electrical carrier signal, a telecommunication signal, and a software distribution medium, etc.
[0067] The above description represents the preferred embodiments of the present invention. It should be noted that those skilled in the art can make various improvements and modifications without departing from the principles of the present invention, and these improvements and modifications are also considered to be within the scope of protection of the present invention.
Claims
1. A signal repair method based on MIMO parallelism, characterized in that, include: Obtain the damaged signal in the target optical fiber, the number of fiber channels, and the filter order; The number of MISO equalizers and their connection numbers are determined based on the number of fiber channels and the filter order. Based on the connection sequence number of the MISO equalizer, the MISO equalizers corresponding to the number of MISO equalizers are connected to obtain a multiple-input multiple-output optical MIMO equalizer. The damaged signal in the optical fiber transmission is repaired based on the multi-input multi-output optical MIMO equalization filter to obtain a complete optical transmission signal; The method for constructing the MISO equalization filter is as follows: Based on the number of fiber channels and the connection sequence of the MISO equalization filter, the pre-acquired optical delay line and interferometer are constructed into a unit delay component; The interferometer is constructed as a unit interferometer component based on the number of fiber optic channels; Based on the filter order, several of the unit delay components are connected sequentially to obtain an intermediate delay component; The output of the intermediate delay component is connected to the input of the unit interference component to obtain the MISO equalization filter.
2. The signal repair method based on MIMO parallel processing according to claim 1, characterized in that, Based on the number of fiber channels and the connection sequence number of the MISO equalization filter, the pre-acquired optical delay line and interferometer are constructed into a unit delay component, including: The number of interferometers in the unit delay component is obtained based on the difference between the number of fiber channels and the connection sequence number of the MISO equalization filter. The interferometers are connected sequentially based on the number of interferometers in the unit delay component to obtain an interference unit; The output end of the interference unit is connected to the input end of the optical delay line to obtain the unit delay component.
3. The signal repair method based on MIMO parallel processing according to claim 2, characterized in that, The step of sequentially connecting several unit delay components based on the filter order to obtain an intermediate delay component includes: The difference between the filter order and the preset order is obtained as the number of unit delay components; The unit delay components are connected sequentially based on the number of unit delay components to obtain the intermediate delay component.
4. The signal repair method based on MIMO parallel processing according to claim 1, characterized in that, The repair of damaged signals in fiber optic transmission based on the multi-input multi-output optical MIMO equalization filter to obtain a complete optical transmission signal includes: Acquire calibration signal; The MIMO equalization filter is calibrated based on the calibration signal to obtain the calibrated MIMO equalization filter. The damaged signal in the optical fiber transmission is repaired by the calibrated multiple-input multiple-output optical MIMO equalization filter to obtain the complete optical transmission signal.
5. The signal repair method based on MIMO parallel processing according to claim 4, characterized in that, The calibration of the multi-input multi-output optical MIMO equalization filter based on the calibration signal to obtain the calibrated multi-input multi-output optical MIMO equalization filter includes: The MISO equalizer is selected sequentially from the multiple input multiple output optical MIMO equalizers as the current MISO equalizer. The calibration signal is input to the current MISO equalizer, and the current MISO equalizer is calibrated based on the calibration signal. This process is repeated until all the MISO equalizers have been polled, resulting in the calibrated multiple input multiple output optical MIMO equalizer.
6. The signal repair method based on MIMO parallel processing according to claim 5, characterized in that, The step of sequentially selecting a MISO equalizer from the multiple-input multiple-output (MIMO) optical equalizers as the current MISO equalizer, inputting the calibration signal to the current MISO equalizer, and calibrating the current MISO equalizer based on the calibration signal, until all the MISO equalizers have been polled, to obtain the calibrated MIMO optical equalizer, includes: Obtain the operating status of the interferometer of the unit delay component in the current MISO equalization filter; The unit delay component or the unit interference component is selected sequentially from the current MISO equalization filter as the current calibration component. The calibration signal is input to the current MISO equalization filter, and the current calibration component in the current MISO equalization filter is calibrated based on the calibration signal and the working state until the unit interference component and all the unit delay components are polled to obtain the calibrated current MISO equalization filter.
7. A signal repair method based on MIMO parallel processing according to claim 6, characterized in that, The step of sequentially selecting the unit delay component or the unit interference component from the current MISO equalizer as the current calibration component, inputting the calibration signal to the current MISO equalizer, and calibrating the current calibration component in the current MISO equalizer based on the calibration signal and the operating state, until all unit interference components and all unit delay components have been polled to obtain the calibrated current MISO equalizer, includes the following step: calibrating the current calibration component in the current MISO equalizer based on the calibration signal and the operating state. Update the operating state of the interferometer in the current calibration component to the cross state; The calibration signal is input to the current calibration component based on the crossover state; The parameters of the interferometer in the current calibration component are adjusted based on the calibration signal until the amplitude of the output delay term of the current MISO equalization filter reaches a preset amplitude value, thus obtaining the calibrated current calibration component. Update the operating state of the interferometer in the current calibration component to the through state.
8. A signal repair device based on MIMO parallelism, characterized in that, include: The acquisition module is used to acquire the damaged signal in the fiber transmission of the target fiber, the number of fiber channels, and the filter order. The determination module is used to determine the number of MISO equalizers and the connection sequence number of the MISO equalizers based on the number of fiber channels and the filter order. A multiple-input multiple-output optical MIMO equalization filter construction module is used to connect the MISO equalization filters corresponding to the number of MISO equalization filters based on the connection sequence number of the MISO equalization filters, so as to obtain a multiple-input multiple-output optical MIMO equalization filter. The repair module is used to repair the damaged signal in the optical fiber transmission based on the multiple-input multiple-output optical MIMO equalization filter, so as to obtain the complete optical transmission signal. The multi-input multi-output optical MIMO equalization filter construction module includes: The unit delay component construction module is used to construct the pre-acquired optical delay line and interferometer into a unit delay component based on the number of optical fiber channels and the connection sequence number of the MISO equalization filter; A unit interference component construction module is used to construct the interferometer into a unit interference component based on the number of fiber channels; An intermediate delay component construction module is used to connect several of the unit delay components sequentially based on the filter order to obtain an intermediate delay component; The MISO equalization filter construction module is used to connect the output of the intermediate delay component to the input of the unit interference component to obtain the MISO equalization filter.
9. A terminal device, characterized in that, The method includes a processor, a memory, and a computer program stored in the memory and configured to be executed by the processor, wherein when the processor executes the computer program, it implements a MIMO-based parallel signal repair method as described in any one of claims 1-7.
10. A computer-readable storage medium, characterized in that, include: A stored computer program, wherein, when the computer program is executed, it controls the device containing the computer-readable storage medium to perform a MIMO-based parallel signal repair method as described in any one of claims 1-7.