Time domain model calculation method, device and terminal equipment containing feedback subsystem

Abstract

The present invention is applicable to the field of communications, and provides a method, device and terminal equipment for calculating a time domain model containing a feedback subsystem, wherein the method comprises: obtaining a transfer parameter between each input port and each output port of a coupling device, wherein the transfer parameter is the ratio of the complex amplitude of the electric field at the output port to the complex amplitude of the electric field at the input port; obtaining a response function of the feedback subsystem; and establishing a time domain model of the feedback subsystem according to the transfer parameter and the response function. The method for calculating a time domain model containing a feedback subsystem provided by the present invention can effectively improve the accuracy of the time domain simulation calculation of the feedback subsystem.

Description

Technical Field

[0001] The present invention belongs to the field of communication technology, and in particular relates to a time domain model calculation method, device and terminal equipment including a feedback subsystem. Background Art

[0002] In various signal processing processes, feedback system is an important component. Accordingly, accurate calculation of the signal passing through the feedback subsystem also has important practical significance.

[0003] Traditionally, the calculation of signals that pass through the feedback subsystem multiple times usually needs to be implemented in the frequency domain. For example, the time domain block simulation method requires solving the frequency domain model of the system, calculating the S parameters, and then converting the frequency domain model into a time domain model through Fourier transform, and finally performing convolution calculations on the input signal and the time domain model. The numerical calculation process of the above methods will inevitably lead to errors and require high sampling accuracy. The sample by sample simulation algorithm in the time domain needs to continuously obtain the input signal to obtain the output signal at each moment. This method cannot correct the delay when the signal passes through each device, and the calculation result is inaccurate. Summary of the invention

[0004] In view of this, an embodiment of the present invention provides a method, an apparatus and a terminal device for calculating a time domain model including a feedback subsystem, which can improve the accuracy of simulation calculation of the feedback subsystem in the time domain.

[0005] A first aspect of an embodiment of the present invention provides a method for calculating a time domain model including a feedback subsystem, which is applied to a target system, wherein the target system includes a coupling device and a feedback subsystem, and the method includes:

[0006] Acquire a transfer parameter between each input port and each output port of the coupling device, wherein the transfer parameter is a ratio of the complex amplitude of the electric field at the output port to the complex amplitude of the electric field at the input port;

[0007] Get the response function of the feedback subsystem;

[0008] A time domain model of the target system is established according to the transfer parameters and the response function of the feedback subsystem.

[0009] A second aspect of an embodiment of the present invention provides a time domain model calculation device including a feedback subsystem, which is applied to a target system, wherein the target system includes a coupling device and a feedback subsystem, and the device includes:

[0010] A transfer parameter acquisition module, used to acquire a transfer parameter between each input port and each output port of the coupling device, wherein the transfer parameter is a ratio of the complex amplitude of the electric field at the output port to the complex amplitude of the electric field at the input port;

[0011] A response function acquisition module is used to acquire the response function of the feedback subsystem;

[0012] A time domain model building module is used to build a time domain model of the target system according to the transfer parameters and the response function of the feedback subsystem.

[0013] A third aspect of an embodiment of the present invention provides a terminal device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor implements the steps of the above method when executing the computer program.

[0014] A fourth aspect of an embodiment of the present invention provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the steps of the method described above are implemented.

[0015] A fifth aspect of an embodiment of the present invention provides a computer program product. When the computer program product is run on a terminal device, the electronic device executes the steps of any one of the methods described in the first aspect.

[0016] Compared with the prior art, the embodiments of the present invention have the following beneficial effects: the embodiments of the present invention provide a method for calculating a time domain model of a feedback subsystem, including obtaining a transfer parameter between each input port and each output port of a coupling device, the transfer parameter being the ratio of the complex amplitude of the electric field at the output port to the complex amplitude of the electric field at the input port; obtaining a response function of the feedback subsystem; and establishing a time domain model of the feedback subsystem according to the transfer parameter and the response function. The method for calculating a time domain model of a feedback subsystem provided by the embodiments of the present invention can effectively improve the accuracy of simulation calculations and reduce the amount of data processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 It is a schematic diagram of an application scenario of the time domain model calculation method including a feedback subsystem provided in an embodiment of the present invention;

[0019] Figure 2 It is a schematic diagram of the implementation flow of the time domain model calculation method including the feedback subsystem provided in an embodiment of the present invention;

[0020] Figure 3It is another application scenario schematic diagram of the time domain model calculation method including the feedback subsystem provided in an embodiment of the present invention;

[0021] Figure 4 is a schematic diagram of a time domain model calculation device including a feedback subsystem provided in an embodiment of the present invention;

[0022] Figure 5 It is a schematic diagram of a terminal device provided in an embodiment of the present invention. DETAILED DESCRIPTION

[0023] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present invention. However, it should be clear to those skilled in the art that the present invention may be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present invention.

[0024] In order to illustrate the technical solution of the present invention, a specific embodiment is provided below for illustration.

[0025] Figure 1 The schematic diagram of the application scenario of the time domain model calculation method including the feedback subsystem provided by the embodiment of the present invention is shown. Figure 1 The method provided in the embodiment of the present invention is applied to a target system, and the target system includes a coupler and a feedback subsystem. The coupler includes port 1, port 2, port 3 and port 4. Port 1 and port 3 are input ports of the coupler, port 2 and port 4 are output ports of the coupler, and the coupler outputs a signal to the feedback subsystem through port 4, and receives a signal processed by the feedback subsystem through port 3.

[0026] In some embodiments, the target system is a linear system.

[0027] Figure 2 FIG. 1 is a schematic diagram showing the implementation flow of the method for calculating a time domain model including a feedback subsystem provided in an embodiment of the present invention. Figure 2 The method provided in this embodiment of the present invention may include steps S101 to S103.

[0028] S101: Acquire a transfer parameter between each input port and each output port of a coupling device, wherein the transfer parameter is a ratio of a complex amplitude of an electric field at an output port to a complex amplitude of an electric field at an input port.

[0029] See also Figure 1In a specific example, port 2 is the main output terminal of port 1, port 4 is the main output terminal of port 3, and the transfer parameter for the main output terminal is a. Port 4 is the coupled output terminal of port 1, port 2 is the coupled output terminal of port 3, and the transfer parameter for the coupled output terminal is b.

[0030] Specifically, when the coupling device is lossless, a 2 +b 2 =1.

[0031] S102: Obtain a response function of the feedback subsystem.

[0032] The response function of the feedback subsystem is determined by the structural parameters of the feedback subsystem.

[0033] In some embodiments, the response function of the feedback subsystem is h c (t).

[0034] S103: Establishing a time domain model of the target system according to the transfer parameters and the response function of the feedback subsystem.

[0035] The time domain model calculation method including the feedback subsystem provided in the embodiment of the present invention can effectively improve the accuracy of simulation calculation and reduce the amount of data processing.

[0036] In some embodiments, the time domain model of the target system includes:

[0037]

[0038] Among them, h(t) is the time domain model of the target system, h m (t) is the response function of the mth signal pathway, where m means that the signal transmission process in the signal pathway passes through the feedback subsystem m times;

[0039]

[0040] Where a is the transfer parameter from each input port of the coupling device to the corresponding main output port, b is the transfer parameter from the input port of the coupling device to the corresponding coupled output port, and h c () is the response function of the feedback subsystem.

[0041] In some further embodiments, the time domain model of the target system includes:

[0042]

[0043] Among them, h(t) is the time domain model of the target system, h m (t) is the response function of the mth signal path, m means that the signal transmission process in the signal path passes through the feedback subsystem m times, and M is the preset threshold;

[0044]

[0045] Where a is the transfer parameter from each input port of the coupling device to the corresponding main output port, b is the transfer parameter from the input port of the coupling device to the corresponding coupled output port, and h c (t) is the response function of the feedback subsystem.

[0046] Specifically, the preset threshold is calculated based on a preset threshold calculation formula;

[0047] The preset threshold calculation formula includes:

[0048] |b 2 a M-1 | 2 <0.1%

[0049] Wherein, M is a preset threshold, and M is the minimum integer that satisfies the preset threshold calculation formula, a is a transfer parameter from each input port of the coupling device to the corresponding main output port, and b is a transfer parameter from the input port of the coupling device to the corresponding coupled output port.

[0050] Figure 3 A schematic diagram of another application scenario of the time domain model calculation method including a feedback subsystem provided in an embodiment of the present invention is shown.

[0051] See also Figure 3 In some embodiments, the feedback subsystem includes a waveguide. In this case, S103 includes:

[0052] A time domain model of the target system is established according to the transfer parameter and the response function of the waveguide; the response function of the waveguide includes:

[0053]

[0054] Among them, h w (t) is the response function of the waveguide, ω0 is the central angular frequency, L is the waveguide length, v g is the group velocity, v ph is the phase velocity.

[0055] In some embodiments, when the feedback subsystem includes a waveguide, the time domain model of the target system includes:

[0056]

[0057] Among them, h(t) is the time domain model of the target system, h m (t) is the response function of the mth signal path, m means that the signal transmission process in the signal path passes through the feedback subsystem m times, and M is the preset threshold;

[0058]

[0059] Where a is the transfer parameter from each input port of the coupling device to the corresponding main output port, b is the transfer parameter from the input port of the coupling device to the corresponding coupled output port, ω0 is the center angular frequency, L is the waveguide length, v g is the group velocity, v ph is the phase velocity. M satisfies |b 2 a M-1 | 2 <0.1% minimum integer.

[0060] In some embodiments, when the feedback subsystem includes a waveguide, after S103, the time domain model calculation method including the feedback subsystem further includes:

[0061] Performing convolution calculation on an input signal of a target system and a time domain model of the target system to obtain an output signal;

[0062] The output signal includes:

[0063]

[0064] The output signal calculation method provided in the embodiment of the present invention, when the feedback subsystem is a waveguide, can directly obtain the output signal without conversion through the computational domain, compared with the time domain Block simulation method, thereby significantly reducing the amount of calculation, reducing errors, and simplifying the simulation algorithm; compared with the time domain Sample by Sample simulation method, it is not limited by the requirement of extremely high sampling frequency under the resonance effect condition, thereby significantly improving the calculation efficiency and accuracy.

[0065] It should be understood that the order of execution of the steps in the above embodiment does not necessarily mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present invention.

[0066] Figure 4 The schematic diagram of the structure of the time domain model calculation device including the feedback subsystem provided by the embodiment of the present invention is shown. Figure 4 In some embodiments, a time domain model calculation device 40 including a feedback subsystem is applied to a target system, wherein the target system includes a coupling device and a feedback subsystem, and the device may include a transfer parameter acquisition module 410, a response function acquisition module 420, and a time domain model establishment module 430.

[0067] The transfer parameter acquisition module 410 is used to acquire the transfer parameters between each input port and each output port of the coupling device, wherein the transfer parameter is the ratio of the complex amplitude of the electric field at the output port to the complex amplitude of the electric field at the input port;

[0068] The response function acquisition module 420 is used to acquire the response function of the feedback subsystem;

[0069] The time domain model building module 430 is used to build the time domain model of the target system according to the transfer parameters and the response function of the feedback subsystem.

[0070] The time domain model calculation device including the feedback subsystem provided in the embodiment of the present invention can effectively improve the accuracy of simulation calculation and reduce the amount of data processing.

[0071] In some embodiments, the time domain model of the target system includes:

[0072]

[0073] Among them, h(t) is the time domain model of the target system, h m (t) is the response function of the mth signal pathway, where m means that the signal transmission process in the signal pathway passes through the feedback subsystem m times;

[0074]

[0075] Where a is the transfer parameter from each input port of the coupling device to the corresponding main output port, b is the transfer parameter from the input port of the coupling device to the corresponding coupled output port, and h c (t) is the response function of the feedback subsystem.

[0076] In some embodiments, the time domain model of the target system includes:

[0077]

[0078] Among them, h(t) is the time domain model of the target system, h m (t) is the response function of the mth signal path, m means that the signal transmission process in the signal path passes through the feedback subsystem m times, and M is the value that satisfies |b 2 a M-1 | 2 <0.1% minimum integer.

[0079]

[0080] Where a is the transfer parameter from each input port of the coupling device to the corresponding main output port, b is the transfer parameter from the input port of the coupling device to the corresponding coupled output port, and h c (t) is the response function of the feedback subsystem.

[0081] In some embodiments, the time domain model building module 430 is specifically used to calculate the preset threshold based on a preset threshold calculation formula;

[0082] The preset threshold calculation formula includes:

[0083] |b 2 a M-1 | 2 <0.1%

[0084] Wherein, M is a preset threshold, and M is the minimum integer that satisfies the preset threshold calculation formula, a is a transfer parameter from each input port of the coupling device to the corresponding main output port, and b is a transfer parameter from the input port of the coupling device to the corresponding coupled output port.

[0085] In some embodiments, the feedback subsystem includes a waveguide;

[0086] The time domain model building module 430 is specifically used to: build a time domain model of the target system according to the transfer parameters and the response function of the waveguide;

[0087] The response function of the waveguide includes:

[0088]

[0089] Among them, h w (t) is the response function of the waveguide, ω0 is the central angular frequency, L is the waveguide length, v g is the group velocity, v ph is the phase velocity.

[0090] In some embodiments, the time domain model of the target system includes:

[0091]

[0092] Among them, h(t) is the time domain model of the target system, h m (t) is the response function of the mth signal path, m means that the signal transmission process in the signal path passes through the feedback subsystem m times, and M is the preset threshold;

[0093]

[0094] Where a is the transfer parameter from each input port of the coupling device to the corresponding main output port, b is the transfer parameter from the input port of the coupling device to the corresponding coupled output port, ω0 is the center angular frequency, L is the waveguide length, v g is the group velocity, v ph is the phase velocity.

[0095] In some embodiments, the time domain model calculation device 40 including the feedback subsystem further includes a convolution calculation module, which is used to perform a convolution calculation on the input signal of the target system and the time domain model of the target system to obtain an output signal;

[0096] The output signal includes:

[0097]

[0098] Figure 5 Schematic diagram of a terminal device provided by an embodiment of the present invention. Figure 5 As shown, the terminal device 50 of this embodiment includes: a processor 500, a memory 510, and a computer program 520 stored in the memory 510 and executable on the processor 500, such as a time domain model calculation program including a feedback subsystem. When the processor 50 executes the computer program 520, the steps in the above-mentioned embodiments of the time domain model calculation method including a feedback subsystem are implemented, such as Figure 2 Alternatively, when the processor 500 executes the computer program 520, the functions of the modules and units in the above-mentioned device embodiments are realized, for example, Figure 4 Functions of modules 410 to 430 are shown.

[0099] Exemplarily, the computer program 520 may be divided into one or more modules or units, which are stored in the memory 510 and executed by the processor 500 to complete the present invention. The one or more modules or units may be a series of computer program instruction segments capable of completing specific functions, which are used to describe the execution process of the computer program 520 in the terminal device 50. For example, the computer program 520 may be divided into a transfer parameter acquisition module, a response function acquisition module, and a time domain model establishment module.

[0100] The terminal device 50 may be a computing device such as a desktop computer, a notebook, a PDA, or a cloud server. The terminal device may include, but is not limited to, a processor 500 and a memory 510. Those skilled in the art will appreciate that Figure 5 It is only an example of the terminal device 50 and does not constitute a limitation of the terminal device 50. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components. For example, the terminal device may also include input and output devices, network access devices, buses, etc.

[0101] The processor 500 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0102] The memory 510 may be an internal storage unit of the terminal device 50, such as a hard disk or memory of the terminal device 50. The memory 510 may also be an external storage device of the terminal device 50, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. equipped on the terminal device 50. Further, the memory 510 may also include both an internal storage unit of the terminal device 50 and an external storage device. The memory 510 is used to store the computer program and other programs and data required by the terminal device. The memory 510 may also be used to temporarily store data that has been output or is to be output.

[0103] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0104] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0105] Those skilled in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of the present invention.

[0106] In the embodiments provided by the present invention, it should be understood that the disclosed devices, terminal equipment and methods can be implemented in other ways. For example, the embodiments of the devices and terminal equipment described above are only schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, and the indirect coupling or communication connection of the devices or units can be electrical, mechanical or other forms.

[0107] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0108] In addition, each functional unit in each embodiment of the present invention may be integrated into one processing unit, or each unit may exist physically separately, or two or more units may be integrated into one unit. The above-mentioned integrated unit may be implemented in the form of hardware or in the form of software functional units.

[0109] If the integrated modules and units are implemented in the form of software functional units and sold or used as independent products, they can be stored in a computer-readable storage medium. Based on this understanding, the present invention implements all or part of the processes in the above-mentioned embodiment method, and can also be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, U disk, mobile hard disk, disk, optical disk, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electric carrier signal, telecommunication signal and software distribution medium. It should be noted that the content contained in the computer-readable medium can be appropriately increased or decreased according to the requirements of legislation and patent practice in the jurisdiction. For example, in some jurisdictions, according to legislation and patent practice, computer-readable media do not include electric carrier signals and telecommunication signals.

[0110] The embodiments described above are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention, and should all be included in the protection scope of the present invention.

Claims

1. A method for calculating a time domain model of a feedback subsystem, characterized in that: Applied to a target system, the target system includes a coupling device and a feedback subsystem, and the method includes: Acquire a transfer parameter between each input port and each output port of the coupling device, wherein the transfer parameter is a ratio of the complex amplitude of the electric field at the output port to the complex amplitude of the electric field at the input port; Get the response function of the feedback subsystem; A time domain model of the target system is established according to the transfer parameter and the response function of the feedback subsystem; the time domain model of the target system includes: Among them, h(t) is the time domain model of the target system, h m (t) is the response function of the mth signal pathway, where m means that the signal transmission process in the signal pathway passes through the feedback subsystem m times; Where a is the transfer parameter from each input port of the coupling device to the corresponding main output port, b is the transfer parameter from the input port of the coupling device to the corresponding coupled output port, and h c (t) is the response function of the feedback subsystem; The time domain model of the target system further includes: Among them, h(t) is the time domain model of the target system, h m (t) is the response function of the mth signal path, m means that the signal transmission process in the signal path passes through the feedback subsystem m times, and M is the preset threshold; Where a is the transfer parameter from each input port of the coupling device to the corresponding main output port, b is the transfer parameter from the input port of the coupling device to the corresponding coupled output port, and h c (t) is the response function of the feedback subsystem.

2. The time domain model calculation method containing a feedback subsystem according to claim 1, characterized in that: Before establishing the time domain model of the target system according to the transfer parameter and the response function, the method further includes: Calculate the preset threshold based on a preset threshold calculation formula; The preset threshold calculation formula includes: |b 2 a M-1 | 2 <0.1% Wherein, M is the minimum integer that satisfies the preset threshold calculation formula, a is the transfer parameter from each input port of the coupling device to the corresponding main output port, and b is the transfer parameter from the input port of the coupling device to the corresponding coupled output port.

3. The time domain model calculation method containing a feedback subsystem according to claim 1, characterized in that: The feedback subsystem includes a waveguide; The step of establishing the time domain model of the target system according to the transfer parameter and the response function of the feedback subsystem comprises: Establishing a time domain model of the target system according to the transfer parameters and the response function of the waveguide; The response function of the waveguide includes: Among them, h w (t) is the response function of the waveguide, ω0 is the central angular frequency, L is the waveguide length, v g is the group velocity, v ph is the phase velocity.

4. The time domain model calculation method containing a feedback subsystem according to claim 3, characterized in that: The time domain model of the target system includes: Among them, h(t) is the time domain model of the target system, h m (t) is the response function of the mth signal path, m means that the signal transmission process in the signal path passes through the feedback subsystem m times, and M is the preset threshold; Where a is the transfer parameter from each input port of the coupling device to the corresponding main output port, b is the transfer parameter from the input port of the coupling device to the corresponding coupled output port, ω0 is the center angular frequency, L is the waveguide length, v g is the group velocity, v ph is the phase velocity.

5. The time domain model calculation method including the feedback subsystem according to claim 4, characterized in that: After establishing the time domain model of the target system according to the transfer parameters and the response function of the feedback subsystem, the method further includes: Performing convolution calculation on an input signal of a target system and a time domain model of the target system to obtain an output signal; The output signal includes:

6. A time domain model calculation device including a feedback subsystem, characterized in that: Applied to a target system, the target system includes a coupling device and a feedback subsystem, and the device includes: A transfer parameter acquisition module, used to acquire a transfer parameter between each input port and each output port of the coupling device, wherein the transfer parameter is a ratio of the complex amplitude of the electric field at the output port to the complex amplitude of the electric field at the input port; A response function acquisition module is used to acquire the response function of the feedback subsystem; A time domain model building module is used to build a time domain model of the target system according to the transfer parameters and the response function of the feedback subsystem; the time domain model of the target system includes: Among them, h(t) is the time domain model of the target system, h m (t) is the response function of the mth signal pathway, where m means that the signal transmission process in the signal pathway passes through the feedback subsystem m times; Where a is the transfer parameter from each input port of the coupling device to the corresponding main output port, b is the transfer parameter from the input port of the coupling device to the corresponding coupled output port, and h c (t) is the response function of the feedback subsystem; The time domain model of the target system further includes: Among them, h(t) is the time domain model of the target system, h m (t) is the response function of the mth signal path, m means that the signal transmission process in the signal path passes through the feedback subsystem m times, and M is the preset threshold; Where a is the transfer parameter from each input port of the coupling device to the corresponding main output port, b is the transfer parameter from the input port of the coupling device to the corresponding coupled output port, and h c (t) is the response function of the feedback subsystem.

7. A terminal device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that: When the processor executes the computer program, the steps of the method according to any one of claims 1 to 5 are implemented.

8. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 5 are implemented.

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