A Signal Level Simulation System Based on LVC

Abstract

The present application discloses a signal-level simulation system based on LVC, which relates to the field of signal simulation, including: a simulation platform for solving sensor initial parameters and target and interference initial parameters; a sensor function-level model for kinematically solving sensor initial parameters, determining the current sensor position, and generating sensor control information; a sensor signal-level model for generating operating timing and sensor parameters in a corresponding mode according to the sensor control information, generating sensor measurement data according to a synthetic signal, and generating a baseband signal; a target and interference signal-level model for generating sensor interference signals, target echo signals, and scene echo signals according to baseband signals and target and interference initial parameters; and the simulation platform is also used for visually monitoring simulation status according to the feedback information of the sensor function-level model and the target and interference signal-level model. The present application can realize realistic simulation of the entire process of sensor movement and detection.

Description

Technical Field

[0001] The present application relates to the field of signal simulation, and in particular to a signal level simulation system based on LVC (Live Virtual Constructive, live, virtual and constructed simulation). Background Art

[0002] Constructing a high-fidelity sensor simulation environment and conducting simulation tests on each component before the actual installation test can help identify relevant problems in the simulation test and effectively solve them, effectively ensuring the smooth progress of the actual installation test. Establishing a signal-level sensor digital system, constructing a complex test scenario with high fidelity, high threat and strong confrontation, and making the sensor detection system "immerse" in a nearly real, synthetic signal-level simulation environment, and conducting joint simulation tests can not only save test costs, but also provide technical support for sensor performance testing, thereby improving the efficiency of the test work. Faced with the current situation of poor interconnection and interoperability of sensor semi-physical and related digital simulation resources, difficulty in integration and sharing, and single test system functions, how to combine geographically distributed and functionally separated sensor anti-interference test resources to form an integrated cross-domain LVC joint test environment and build a realistic, economical and efficient signal-level simulation system is still a difficult problem to be solved. Summary of the invention

[0003] The purpose of this application is to provide a signal-level simulation system based on LVC, which can realize realistic simulation of the entire process of sensor movement and detection.

[0004] To achieve the above objectives, the present application provides a signal-level simulation system based on LVC, including the following model.

[0005] A simulation platform is used to solve the initial parameters of the sensor and the initial parameters of the target and interference; a sensor function level model is connected to the simulation platform and is used to perform kinematic solution on the initial parameters of the sensor, determine the current sensor position, and generate sensor control information; the sensor control information includes sensor control instructions, control data and inertial navigation auxiliary data.

[0006] A sensor signal level model is connected to the sensor function level model, and is used to generate an operating timing and sensor parameters in a corresponding mode according to the sensor control information, and to generate sensor measurement data according to a synthetic signal, and to generate a baseband signal; the synthetic signal is synthesized by a sensor interference signal, a target echo signal, and a scene echo signal.

[0007] A target and interference signal level model is connected to the sensor signal level model and the simulation platform, and is used to generate a sensor interference signal, a target echo signal and a scene echo signal according to the baseband signal and the target and interference initial parameters, and send the sensor interference signal, the target echo signal and the scene echo signal to the sensor signal level model.

[0008] The simulation platform is also used to perform visual monitoring of the simulation status according to the feedback information of the sensor function level model and the target and interference signal level model.

[0009] According to the specific embodiments provided in the present application, the present application discloses the following technical effects: the present application provides a signal-level simulation system based on LVC, which uses a semi-physical simulation device to realize the signal-level simulation between the sensor and the target, the target's surrounding environment, and the interference, and realizes the information interaction between the sensor function-level model, the simulation platform and the semi-physical simulation device (i.e., the sensor signal-level model and the target and interference signal-level model) based on LVC, so as to realize the realistic simulation of the entire process of sensor movement and detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0011] Figure 1 A schematic diagram of the functional modules of an LVC-based signal-level simulation system provided in one embodiment of the present application.

[0012] Figure 2 A schematic diagram of the operation flow of an LVC-based signal-level simulation system provided in one embodiment of the present application. DETAILED DESCRIPTION

[0013] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0014] In order to make the above-mentioned objects, features and advantages of the present application more obvious and easy to understand, the present application is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0015] In an exemplary embodiment, Figure 1As shown, a signal level simulation system based on LVC is provided, including: a simulation platform 1, a sensor function level model 2, a sensor signal level model 3 and a target and interference signal level model 4.

[0016] The simulation platform 1 is mainly used for the timing control of the operation of the entire simulation system and for realizing information interaction between different model entities. The simulation platform 1 is used to solve the initial parameters of the sensor and the initial parameters of the target and interference; it is also used to perform visual monitoring of the simulation status according to the feedback information of the sensor function level model 2 and the target and interference signal level model 3.

[0017] The sensor function level model 2 mainly realizes functions such as sensor motion state solution and sensor control instruction generation. The sensor function level model 2 is connected to the simulation platform 1 and is used to perform kinematic solution on the initial parameters of the sensor, determine the current sensor position, and generate sensor control information; the sensor control information includes sensor control instructions, control data and inertial navigation auxiliary data.

[0018] The sensor signal level model 3 mainly realizes functions such as sensor state control, sensor baseband signal generation, receiving feedback signals of the synthetic target and interference signal level model 4, and generating sensor measurement data. The sensor signal level model 3 is connected to the sensor function level model 1, and is used to generate the operating timing and sensor parameters in the corresponding mode according to the sensor control information, and to generate sensor measurement data according to the synthetic signal, and to generate the baseband signal; the synthetic signal is synthesized by the sensor interference signal, the target echo signal and the scene echo signal.

[0019] The target and interference signal level model 4 mainly realizes the functions of generating sensor interference signals, calculating detection target echo signals and calculating scene echo signals. The target and interference signal level model 4 is connected to the sensor signal level model 3 and the simulation platform 1, and is used to generate sensor interference signals, target echo signals and scene echo signals according to the baseband signals and the target and interference initial parameters, and send the sensor interference signals, the target echo signals and the scene echo signals to the sensor signal level model 3.

[0020] Implementation of data interaction between heterogeneous systems: (1) Using a 10 Gigabit network interface to realize signal interaction between the sensor signal level model and the target and interference signal level models; (2) Using a 1 Gigabit network interface to realize information interaction between the sensor function level model and the sensor signal level model, and between the simulation platform and the target and interference signal level models; (3) Using a dynamic library call method to realize information interaction between the simulation platform and the sensor function level model.

[0021] In an exemplary embodiment, the simulation platform 1 includes: a sensor model agent 11 , a target and interference model agent 12 , a simulation execution engine 13 and a data interaction component 14 .

[0022] The sensor model agent 11 is connected to the sensor function level model 2 for solving the initial parameters of the sensor and sending the initial parameters of the sensor to the sensor function level model 2, while receiving the feedback information of the sensor function level model 2 for visual monitoring of the simulation status.

[0023] As a sensor entity in the simulation platform 1, the sensor model agent 11 transmits initialization parameters, hydrological and meteorological data and other information to the sensor function level model 2, and at the same time receives the position, speed, posture and other information output by the sensor function level model 2 for visualization monitoring of the simulation status.

[0024] The target and interference model agent 12 is connected to the target and interference signal level model 4, and is used to solve the target and interference initial parameters, and send the target and interference initial parameters to the target and interference signal level model 4, while receiving the feedback information of the target and interference signal level model 4 to perform visual monitoring of the simulation status.

[0025] The target and interference model agent 12 acts as the detected target, sensor interference, and scene entity in the simulation platform 1, transmits initialization parameters such as entity position, interference pattern, and interference power to the target and interference signal level model 4, and simultaneously receives information such as position, interference direction, and interference status output by the target and interference signal level model 4 for visualization monitoring of the simulation status.

[0026] The simulation execution engine 13 is connected to the sensor model agent 11 and the target and interference model agent 12 respectively, and is used to allocate storage and computing resources to the sensor model agent 11 and the target and interference signal level model agent 12, and realize clock synchronization and timing control.

[0027] The data interaction component 14 is respectively connected to the simulation execution engine 13, the sensor model agent 11 and the target and interference model agent 12 to realize data interaction.

[0028] The data interaction component 14 is for data interaction of position, speed and other status information between the sensor entity and the detected target, sensor interference, and scene entities.

[0029] In an exemplary embodiment, the sensor function level model 2 includes: a kinematic solution module 21 and a sensor control module 22 .

[0030] The kinematics solution module 21 is connected to the simulation platform 1 and is used to perform kinematics solution according to the initial parameters of the sensor to determine the current sensor position.

[0031] The kinematic solution module 21 solves the current sensor position according to the sensor position of the previous simulation step, motion control instructions, dynamic characteristics of the sensor mounting platform, surrounding hydrological and meteorological parameters, etc.

[0032] The sensor control module 22 is connected to the kinematic solution module 21 and is used to determine the sensor state according to the current sensor position and generate sensor control information.

[0033] The sensor control module 22 determines the sensor state according to the initialization binding parameters and the current position of the sensor, and generates information such as sensor control instructions, control data, and inertial navigation auxiliary data.

[0034] In an exemplary embodiment, the sensor signal level model 3 includes: a main control module 31 , a baseband signal generation module 32 , a signal synthesis module 33 and a signal interaction module 34 .

[0035] The main control module 31 is connected to the sensor function level model 2, and is used to generate the operating sequence and sensor parameters in the corresponding mode according to the sensor control information, and generate sensor measurement data according to the synthetic signal.

[0036] The main control module 31 receives control instructions, control data, inertial navigation auxiliary data and other information sent by the sensor control module 22, generates the operating timing and sensor parameters in the corresponding mode, and generates sensor measurement data according to the synthesized signal received by the sensor.

[0037] The baseband signal generating module 32 is connected to the main control module 31 , and is used to generate a baseband signal according to information such as sensor transmission signal parameters and working mode sent by the main control module 31 .

[0038] The signal synthesis module 33 is connected to the main control module 31 and is used to synthesize the sensor interference signal, the target echo signal and the scene echo signal according to the spatial phase relationship and the corresponding absolute power.

[0039] The signal interaction module 34 is connected to the baseband signal generation module 32 , the signal synthesis module 33 and the target and interference signal level model 4 respectively, and is used to realize signal interaction between the sensor and the target and interference signal level model 4 .

[0040] In an exemplary embodiment, the target and interference signal level model 4 includes: a sensor interference signal level model 41 , a detection target scattering characteristic model 42 and a scene scattering characteristic model 43 .

[0041] The sensor interference signal level model 41 is connected to the sensor signal level model 3 and the simulation platform 1, and is used to generate a sensor interference signal according to the baseband signal and the target and interference initial parameters.

[0042] The sensor interference signal level model 41 is mainly based on the received baseband signal, and modulates a complex pattern interference signal according to parameters such as interference pattern and interference power.

[0043] The detection target scattering characteristic model 42 is connected to the sensor signal level model 3 and is used to calculate the target echo signal according to the baseband signal.

[0044] The detection target scattering characteristic model 42 is mainly based on the received baseband signal, and calculates the target echo signal according to the detection target scattering characteristics, relative position relationship and other parameters.

[0045] The scene scattering characteristic model 43 is connected to the sensor signal level model 3 and is used to calculate the scene echo signal according to the baseband signal.

[0046] The scene scattering characteristic model 43 is mainly based on the received baseband signal and calculates the scene echo signal according to the scattering characteristics of the scene around the detection target, the relative position relationship and other parameters.

[0047] In an exemplary embodiment, the specific construction of each module of the LVC-based signal-level simulation system is as follows.

[0048] (1) Construction of simulation platform 1.

[0049] 1) Select a simulation runtime engine that is versatile, extensible, and fully functional13.

[0050] 2) Define the data interaction protocol according to the interaction information between the sensor mounting platform entity and the detected target, sensor interference, and scene entities, and develop the data interaction component 14 based on the simulation runtime engine 13.

[0051] 3) Design the sensor entity function function according to the sensor functional level model 2 interface function, parameter binding settings, data interaction logic with other model entities, operation status monitoring requirements, etc., and build the sensor model agent 11 based on the simulation runtime engine 13.

[0052] 4) According to the initialization settings of the sensor interference signal level model 41, the detection target scattering characteristic model 42, the scene scattering characteristic model 43, the data interaction logic with other model entities, the operation status monitoring requirements, etc., design the detection target, sensor interference, scene and other entity function functions, and build the target and interference model agent 12 based on the simulation operation engine 13.

[0053] (2) Construction of sensor function level model.

[0054] 1) According to the logic of sensor initial parameter binding, motion control, sensor control, etc., the sensor kinematic solution module 21 is constructed in combination with the dynamic characteristics of the sensor mounting platform.

[0055] 2) Construct a sensor control module 22 according to the sensor control mechanism, posture control, etc.

[0056] (3) Sensor signal level model construction.

[0057] 1) Construct the main control module 31 according to the functional logic of sensor self-check, working mode processing, telemetry data processing, time synchronization processing, control instruction processing, workflow control, etc.

[0058] 2) Construct a baseband signal generation module 32 according to the pulse generation principle of the sensor in different working modes and the linear frequency modulation pulse waveform generation principle.

[0059] 3) According to the sensor's response mechanism to different types of sensor interference signals, detection target scattered echo signals and scene scattered echo signals, as well as electromagnetic wave transmission characteristics, a signal synthesis module 33 is constructed.

[0060] 4) Define a data interaction protocol according to the interaction signals between the sensor and the detection target, sensor interference, and scenario model, and implement a signal interaction module 34 based on the Aurora protocol or the TCP / IP protocol.

[0061] (4) Construction of target and interference signal level models.

[0062] 1) Construct a sensor interference signal level model based on the working mode, signal reconnaissance, interference signal modulation and other working mechanisms of the sensor interference equipment41.

[0063] 2) Construct a detection target scattering characteristic model based on the target's backscattering characteristics at different frequencies and orientations42.

[0064] 3) Construct a scene scattering characteristic model 43 based on the backscattering characteristics of the scene at different frequencies and orientations within the sensor field of view.

[0065] In an exemplary embodiment, Figure 2 As shown, the operation process of the signal level simulation system based on LVC is as follows.

[0066] (1) The simulation starts and a simulation start signal is sent.

[0067] (2) The sensor model agent 11 initializes the sensor function level model 2 according to the bound parameters such as the flight starting point, target point, and planned path point, and calculates the sensor initialization parameters and sends them to the sensor function level model 2.

[0068] (3) The sensor signal level model 3 is initialized according to the sensor initialization parameters sent by the sensor function level model 2.

[0069] (4) The target and interference model agent 12 initializes the target and interference signal level model 4 according to the detected entity location, interference pattern, interference power and other parameters.

[0070] (5) The simulation running engine 13 advances according to the simulation running step size, and executes the following steps within a simulation advancement cycle.

[0071] (a) The kinematic solution module 21 in the sensor function level model 2 solves the current sensor position according to the sensor mounting platform position, motion control instructions, sensor mounting platform dynamic characteristics, hydrological and meteorological parameters, etc. of the previous simulation step.

[0072] (b) The target and interference model agent 12 receives the current position of the sensor mounting platform through the data interaction component 14 and solves related parameters to decide whether to start releasing the sensor interference. If the sensor interference is to be released, the sensor interference signal level model 41 sends a sensor interference signal and related interference parameters to start releasing the sensor interference.

[0073] (c) The sensor control module 22 in the sensor function level model 2 determines the sensor state according to the initialization binding parameters and the current position of the sensor. If the sensor is not powered on, step (a) is executed. If the sensor is powered on, the sensor control module 22 generates information such as sensor control instructions, control data, and inertial navigation auxiliary data, and sends them to the sensor signal level model 3.

[0074] (d) Within a signal interaction cycle, the sensor signal level model executes according to the following steps.

[0075] 1) The main control module 31 receives control instructions, control data, inertial navigation auxiliary data and other information issued by the sensor control module 22, generates the operating sequence and sensor operating parameters under the corresponding mode, and sends the working mode instructions, system operating parameters and inertial navigation data to the baseband signal generation module 32.

[0076] 2) The baseband signal generation module 32 generates a corresponding baseband signal according to the received sensor transmission signal parameters, working mode and other information.

[0077] 3) The signal interaction module 34 forwards the baseband signal to the target and interference signal level model 4.

[0078] 4) The sensor interference signal level model 41 modulates a complex interference signal based on the received baseband signal according to parameters such as interference pattern and interference power, and feeds it back to the signal interaction module 34.

[0079] 5) The detection target scattering characteristic model 42 calculates the target echo signal based on the received baseband signal according to the target scattering characteristics, relative position relationship and other parameters and feeds it back to the signal interaction module 34.

[0080] 6) The scene scattering characteristic model 43 calculates the scene echo signal based on the received baseband signal and according to the scattering characteristics of the scene around the target, the relative position relationship and other parameters, and feeds it back to the signal interaction module 34.

[0081] 7) The signal synthesis module 33 synthesizes the sensor interference signal, the detection target echo signal and the scene echo signal according to the spatial phase relationship and the corresponding absolute power, and outputs the synthesized signal to the main control module 31 .

[0082] 8) The main control module 31 generates sensor measurement data according to the synthesized signal received by the sensor and sends it to the sensor control module 22 .

[0083] (e) The sensor control module 22 generates operation control instructions according to the sensor measurement data, the current motion state of the sensor mounting platform and other parameters.

[0084] (f) Determine whether the sensor mounting platform has reached the target point. If not, execute step (a); otherwise, end the simulation.

[0085] This application uses semi-physical simulation equipment to realize signal-level simulation between sensors and targets, target surrounding environment, and interference, and realizes information interaction between sensor functional level models, simulation platforms and semi-physical simulation equipment based on LVC, thereby achieving realistic simulation of the entire sensor movement and detection process.

[0086] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0087] This article uses specific examples to illustrate the principles and implementation methods of this application. The description of the above embodiments is only used to help understand the method and core ideas of this application. At the same time, for those skilled in the art, according to the ideas of this application, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting this application.

Claims

1. A signal level simulation system based on LVC, characterized in that: include: Simulation platform, used to solve the initial parameters of sensors and the initial parameters of targets and interferences; A sensor function level model, connected to the simulation platform, for performing kinematics calculation on the initial parameters of the sensor, determining the current sensor position, and generating sensor control information; the sensor control information includes sensor control instructions, control data, and inertial navigation auxiliary data; a sensor signal level model, connected to the sensor function level model, for generating an operating timing and sensor parameters in a corresponding mode according to the sensor control information, generating sensor measurement data according to a synthetic signal, and generating a baseband signal; the synthetic signal is synthesized by a sensor interference signal, a target echo signal, and a scene echo signal; a target and interference signal level model, connected to the sensor signal level model and the simulation platform, for generating a sensor interference signal, a target echo signal and a scene echo signal according to the baseband signal and the target and interference initial parameters, and sending the sensor interference signal, the target echo signal and the scene echo signal to the sensor signal level model; The simulation platform is also used to perform visual monitoring of the simulation status according to the feedback information of the sensor function level model and the target and interference signal level model; The target and interference signal level models include: a sensor interference signal level model, connected to the sensor signal level model and the simulation platform, for generating a sensor interference signal according to the baseband signal and the target and interference initial parameters; A detection target scattering characteristic model, connected to the sensor signal level model, for calculating a target echo signal based on the baseband signal; The scene scattering characteristic model is connected to the sensor signal level model and is used to calculate the scene echo signal according to the baseband signal.

2. The LVC-based signal level simulation system according to claim 1, characterized in that: The simulation platform comprises: A sensor model agent is connected to the sensor function level model, and is used to solve the initial parameters of the sensor, and send the initial parameters of the sensor to the sensor function level model, and receive the feedback information of the sensor function level model to perform visual monitoring of the simulation state; A target and interference model agent is connected to the target and interference signal level model, and is used to solve the target and interference initial parameters, and send the target and interference initial parameters to the target and interference signal level model, and receive the feedback information of the target and interference signal level model to perform visual monitoring of the simulation status; A simulation running engine, connected to the sensor model agent and the target and interference model agent, respectively, for allocating storage and computing resources to the sensor model agent and the target and interference model agent, and realizing clock synchronization and timing control; The data interaction component is respectively connected with the simulation execution engine, the sensor model agent and the target and interference model agent to realize data interaction.

3. The LVC-based signal level simulation system according to claim 2, characterized in that: The construction of the simulation platform includes: Defining a data interaction protocol according to the interaction information between the sensor mounting platform entity and the detected target, sensor interference, and scene entity, and developing the data interaction component based on the simulation runtime engine; Design the sensor entity function function according to the sensor function level model interface function, element binding settings, data interaction logic between other model entities and operation status monitoring requirements, and build the sensor model agent based on the simulation operation engine; According to the initialization settings of the target and interference signal level models, the data interaction logic between other model entities and the operation status monitoring requirements, the detection target, sensor interference and scene entity function functions are designed, and the target and interference model agents are built based on the simulation runtime engine.

4. The LVC-based signal level simulation system according to claim 1, characterized in that: The sensor function level model includes: A kinematics solution module, connected to the simulation platform, for performing kinematics solution according to the initial parameters of the sensor to determine the current sensor position; The sensor control module is connected to the kinematic solution module and is used to determine the sensor state according to the current sensor position and generate sensor control information.

5. The LVC-based signal level simulation system according to claim 4, characterized in that: The construction of the sensor function level model includes: According to the sensor initial parameter binding, motion control and sensor control, the sensor kinematics solution module is built in combination with the dynamic characteristics of the sensor mounting platform; The sensor control module is constructed according to the sensor control mechanism and posture control.

6. The LVC-based signal level simulation system according to claim 1, characterized in that: The sensor signal level model includes: A main control module, connected to the sensor function level model, for generating an operating timing and sensor parameters in a corresponding mode according to the sensor control information, and generating sensor measurement data according to a synthetic signal; A baseband signal generating module, connected to the main control module, for generating a baseband signal according to the sensor transmission signal parameters and the working mode sent by the main control module; A signal synthesis module, connected to the main control module, for synthesizing the sensor interference signal, the target echo signal and the scene echo signal according to the spatial phase relationship and the corresponding absolute power; The signal interaction module is respectively connected to the baseband signal generation module, the signal synthesis module and the target and interference signal level model to realize signal interaction.

7. The LVC-based signal level simulation system according to claim 6, characterized in that: The construction of the sensor signal level model includes: The main control module is constructed based on sensor self-checking, working mode processing, telemetry data processing, time synchronization processing, control instruction processing and workflow control; The baseband signal generation module is constructed according to the pulse generation principle of the sensor in different working modes and the linear frequency modulation pulse waveform generation principle; According to the sensor's response mechanism to different types of sensor interference signals, detection target scattered echo signals and scene scattered echo signals, as well as electromagnetic wave transmission characteristics, a signal synthesis module is constructed; The data interaction protocol is defined according to the interaction signals between the sensor and the detection target, sensor interference, and scene model, and a signal interaction module is built based on the Aurora protocol or TCP / IP protocol.

8. The LVC-based signal level simulation system according to claim 1, characterized in that: The construction of the target and interference signal level model includes: Construct a sensor jammer signal level model based on the sensor jammer device operating mode, signal reconnaissance, and jammer signal modulation; Construct a detection target scattering characteristic model based on the target's backscattering characteristics at different frequencies and different directions; A scene scattering characteristic model is constructed based on the backscattering characteristics of the scene at different frequencies and orientations within the sensor's field of view.

9. The LVC-based signal level simulation system according to claim 1, characterized in that: A 10G network interface is used to realize the signal interaction between the sensor signal level model and the target and interference signal level model; a 1G network interface is used to realize the information interaction between the sensor function level model and the sensor signal level model, and between the simulation platform and the target and interference signal level model; The dynamic library calling method is used to realize the information interaction between the simulation platform and the sensor function level model.

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