CN114282363A - Radar warning equipment simulation system based on digital domain - Google Patents
Radar warning equipment simulation system based on digital domain Download PDFInfo
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Abstract
The application provides a radar warning equipment simulation system based on digital domain, this system includes: a radar alarm simulator and a control terminal; the control terminal is used for simulating battlefield environment excitation data; the radar warning simulator is used for simulating the battlefield environment according to the battlefield environment excitation data; the control terminal is also used for evaluating the performance of the radar warning device based on the simulated battlefield environment. The simulation environment parameter configuration can be flexibly changed through the radar warning simulator to carry out real-time battlefield simulation, and the real-time performance of the simulation generation of the radar signals with large data volume can be guaranteed through a radar warning device simulation system formed by the radar warning simulator and the control terminal.
Description
Technical Field
The application relates to the technical field of radar signal processing, in particular to a digital domain-based radar warning equipment simulation system.
Background
In several local modern wars such as gulf wars and kosovier wars, radar signal reconnaissance becomes an important factor of battlefield victory or defeat relationship. The modern military weaponry is more and more widely adopting radar signal reconnaissance technology, a radar warning system is one of representative weaponry, and the present fighter plane is basically provided with the radar warning system for monitoring and arming the battlefield environment.
In the research process of the complex system, the simulation means can provide the inspection and evaluation of the equipment and system use performance and algorithm on one hand, and on the other hand, the complex field test or actual combat exercise with expensive organization cost is avoided.
In recent years, with the progress of simulation technology, the application in military and civil fields develops deeply and extensively, and the index requirements of simulation systems are higher and higher. The simulation technical method has the advantages of strong controllability, capability of carrying out repeated experiments on a large number of data analysis and the like, and becomes an effective means for development, demonstration and fighting research of modern electronic equipment.
However, in the radar alarm simulation system in the prior art, the whole system is often too cumbersome, real-time battlefield simulation cannot be performed by flexibly changing the configuration of simulation environment parameters, and the real-time performance of the system is poor when a large amount of data of radar signals are generated in a simulation mode.
Disclosure of Invention
In order to solve one of the technical defects, the application provides a digital domain-based radar warning device simulation system.
In a first aspect of the present application, a digital domain-based radar warning device simulation system is provided, the system comprising: a radar alarm simulator and a control terminal;
the control terminal is used for simulating battlefield environment excitation data;
the radar warning simulator is used for simulating a battlefield environment according to the battlefield environment excitation data;
the control terminal is further used for evaluating the performance of the radar warning equipment based on the simulated battlefield environment.
The application provides a radar warning equipment simulation system based on digital domain, this system includes: a radar alarm simulator and a control terminal; the control terminal is used for simulating battlefield environment excitation data; the radar warning simulator is used for simulating the battlefield environment according to the battlefield environment excitation data; the control terminal is also used for evaluating the performance of the radar warning device based on the simulated battlefield environment. The simulation environment parameter configuration can be flexibly changed through the radar warning simulator to carry out real-time battlefield simulation, and the real-time performance of the simulation generation of the radar signals with large data volume can be guaranteed through a radar warning device simulation system formed by the radar warning simulator and the control terminal.
Drawings
The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the application and not to limit the application. In the drawings:
fig. 1 is an architecture diagram of a digital domain-based radar warning device simulation system according to an embodiment of the present application;
FIG. 2 is an architecture diagram of another digital domain-based radar warning device simulation system according to an embodiment of the present application;
FIG. 3 is an electrical block diagram of a radar warning emulator provided in an embodiment of the present application;
FIG. 4 is an architecture diagram of another digital domain-based radar warning device simulation system according to an embodiment of the present application;
fig. 5 is a functional schematic diagram of a digital domain-based radar warning device simulation system according to an embodiment of the present application;
fig. 6 is a schematic view of a work flow of a digital domain-based radar warning device simulation system according to an embodiment of the present application;
fig. 7 is a functional schematic diagram of PDW data simulation performed by a digital domain-based radar warning device simulation system according to an embodiment of the present application;
FIG. 8 is a schematic diagram of the variation of the angle of arrival with the local position provided by the embodiment of the present application;
fig. 9 is a schematic diagram of monitoring and displaying by a digital domain-based radar warning device simulation system according to an embodiment of the present application.
Detailed Description
In order to make the technical solutions and advantages of the embodiments of the present application more apparent, the following further detailed description of the exemplary embodiments of the present application with reference to the accompanying drawings makes it clear that the described embodiments are only a part of the embodiments of the present application, and are not exhaustive of all embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
In the process of implementing the present application, the inventor finds that in recent years, along with the progress of simulation technology, the application depth and breadth in the military and civil fields are developed, and the index requirements of the simulation system are higher and higher. The simulation technical method has the advantages of strong controllability, capability of carrying out repeated experiments on a large number of data analysis and the like, and becomes an effective means for development, demonstration and fighting research of modern electronic equipment. However, in the radar alarm simulation system in the prior art, the whole system is often too cumbersome, real-time battlefield simulation cannot be performed by flexibly changing the configuration of simulation environment parameters, and the real-time performance of the system is poor when a large amount of data of radar signals are generated in a simulation mode.
In view of the foregoing problems, an embodiment of the present application provides a digital domain-based radar warning device simulation system, where the system includes: a radar alarm simulator and a control terminal; the control terminal is used for simulating battlefield environment excitation data; the radar warning simulator is used for simulating the battlefield environment according to the battlefield environment excitation data; the control terminal is also used for evaluating the performance of the radar warning device based on the simulated battlefield environment. The simulation environment parameter configuration can be flexibly changed through the radar warning simulator to carry out real-time battlefield simulation, and the real-time performance of the simulation generation of the radar signals with large data volume can be guaranteed through a radar warning device simulation system formed by the radar warning simulator and the control terminal.
Referring to fig. 1, the digital domain-based radar warning device simulation system provided in this embodiment includes: the system comprises a radar alarm simulator and a control terminal.
1. Control terminal
The control terminal is used for simulating battlefield environment excitation data.
In addition, the control terminal is also used for evaluating the performance of the radar warning device based on the simulated battlefield environment.
Specifically, referring to fig. 2, the control terminal includes: control terminal software and embedded software.
1) Control terminal software
And the control terminal software is used for generating a radar pulse signal based on the battlefield environment excitation data.
In the case of a particular implementation,
(1) and the control terminal software receives the battlefield environment incentive data or sets the battlefield environment incentive data.
(2) And the control terminal analyzes and resolves the battlefield environment excitation data by combining with a radar radiation source information base.
(3) And the control terminal software generates a radar pulse signal according to the analysis settlement result.
Battlefield environment incentive data, including but not limited to: simulating propulsion time, radiation source information and carrier information.
Radiation source information includes, but is not limited to, one or more of the following: the radiation source information table, the radiation source parameter table, the phased array radar working parameter table, the radiation source position and the radiation source type.
The carrier information includes, but is not limited to, carrier position and/or carrier attitude.
In addition, after the control terminal software generates a radar pulse signal according to the analysis and settlement result, the control terminal software can also collect simulation state information of the radar warning device in the simulated battlefield environment.
In addition, after the control terminal software collects the simulation state information of the radar warning device in the simulated battlefield environment, the control terminal software can also display the simulation state information.
Wherein, the simulation state information includes but is not limited to one or more of the following: the method comprises the steps of obtaining radiation source parameter information, the relative position relation between a carrier and a warning radiation source target, the simulation time running condition, the upper computer model resolving condition, the simulation state of a processing board card and data reported by a radar warning simulator.
And processing the simulation state of the board card, including but not limited to processing the alarm target information of the board card and/or processing the interference state of the board card.
In addition, in a specific implementation, the radar Pulse signal may be a PDW (Pulse description Word) Pulse signal.
Besides, the radar pulse signal may also be an NPDW (narrow-band pulse description) pulse signal.
Regardless of the type of the radar pulse signal, the type of the pulse signal includes, but is not limited to, one or more of the following: conventional pulse, frequency agility, multiple frequency spread, frequency diversity, pulse compression, pulse doppler.
And, the pulse signal is generated 100 ten thousand per second.
Taking the example that the radar pulse signal may be a PDW pulse signal, the control terminal software may generate a variety of PDW pulse signals based on the battlefield environment excitation data.
For example,
A. the control terminal software generates a PDW Pulse signal of a fixed PRI (Pulse Repetition Interval) based on the battlefield environment excitation data.
The pulse arrival time of the PDW pulse signal satisfies the following relationship:
TOAn＝TOAn-1+PRI+εn。
wherein n is a pulse identifier, TOAnTime of arrival (TOA) for the nth pulsen-1For the (n-1) th pulse arrival time, epsilonnIs the nth pulse error.
B. And the control terminal software generates a PDW pulse signal of pulse-to-pulse spread PRI based on the battlefield environment excitation data.
TOAn＝TOAn-1+PRI(n mod S)。
Wherein n is a pulse identifier, TOAnFor the nth pulse arrival time, TOAn-1Is the n-1Pulse arrival time, PRI()Is the inter-pulse spread sequence, S is the position number, and the position number is the element number in the inter-pulse spread sequence.
C. The control terminal software generates a jittered PRI PDW pulse signal based on the battlefield environment excitation data.
TOAn＝TOAn-1+PRI+tn。
Wherein n is a pulse identifier, TOAnFor the nth pulse arrival time, TOAn-1Is the (n-1) th pulse arrival time, tnThe jitter amount of the nth pulse.
In addition, in both cases of A, B and C, the control terminal software performs an iterative simulation of the error of the pulse arrival time by the following formula:
wherein n is a pulse identifier, TOAnFor the time of arrival of the nth pulse,
simulated nth pulse arrival time, δnRandom jitter due to the nth pulse is not considered a factor.
D. And the control terminal software generates a PDW Pulse signal of fixed PW (Pulse-Width) based on the battlefield environment excitation data.
The PW of the PDW pulse signal satisfies the following relationship:
PW＝PWn+εn。
wherein n is a pulse mark, PWnIs the pulse width of the nth pulse, ∈nIs the nth pulse error.
E. And the control terminal software generates a PDW pulse signal of a periodically-changed pulse width PW based on the battlefield environment excitation data.
F. And the control terminal software generates a PDW pulse signal of a fixed carrier frequency leading edge value based on the battlefield environment excitation data.
G. And the control terminal software generates a PDW pulse signal with agile pulse frequency based on the battlefield environment excitation data.
The RF (carrier frequency leading edge value) of the PDW pulse signal satisfies the following relationship:
RFn＝RFn-1+rfn。
wherein n is a pulse marker, RFnIs the leading edge value of the carrier frequency, RF, of the nth pulsen-1Carrier frequency leading edge value, rf, of the n-1 th pulsenThe carrier frequency leading edge value of the nth pulse varies.
2) Embedded software
The embedded software is used for simulating radar pulse signals in a digital domain and sending the simulated radar pulse signals to the radar alarm simulator through the gigabit network.
During specific implementation, the embedded software generates PDW pulse signals of four quadrant receivers corresponding to the same radiation source at the same transmission moment in real time in a digital domain.
In addition, the embedded software is also used for carrying out receiver self-checking simulation.
In addition, the embedded software is also used to simulate PSF (pulse characteristic data) pulse signals.
For example, the embedded software dynamically simulates and solves the PSF pulse signal according to a simulation scene and by combining the working principle and the performance of the narrow-band alarm receiver.
In addition, the embedded software is also used for interacting simulation time running conditions with the control terminal software, collecting the simulation state of the processing board card and reporting the simulation state of the processing board card to the control terminal software.
In addition, the embedded software is also used for collecting and processing data reported by the radar alarm simulator and reporting the data reported by the radar alarm simulator to the control terminal software.
2. Radar alarm simulator
The radar warning simulator is used for simulating the battlefield environment according to the battlefield environment excitation data.
Specifically, the radar warning simulator is used for simulating a battlefield environment according to the simulation instruction.
In a specific implementation, referring to fig. 2, the radar warning simulator is a radar warning simulation board.
The electrical block diagram of the radar alarm simulator is shown in fig. 3, and the radar alarm simulator (such as a radar alarm simulation board) adopts a PPC (PowerPC, a central processing unit with a reduced instruction set architecture) + FPGA (Field Programmable Gate Array) architecture.
The radar alarm simulator is composed of a PPC, an FPGA, a DDR3(Double Data Rate SDRAM, Double-Rate SDRAM, which is a computer memory specification), a FLASH (FLASH memory), an MCU (Microcontroller Unit), a photoelectric conversion device and a power conversion chip.
The radar warning simulator comprises 9 groups of Mechanical Transfer (MT) type optical interfaces, 1 path of RS422 communication interfaces, 14 paths of 422 bidirectional differential pulses, 4 paths of 422 unidirectional output differential pulses, 1 path of RS232 communication interfaces and 1 path of gigabit network debugging interfaces.
During specific implementation, the embedded software is used for simulating radar pulse signals in a digital domain and sending the simulated radar pulse signals to the FPGA through the gigabit network.
The FPGA is used to perform battlefield environment simulation according to the simulation instructions.
That is, the radar warning emulator is embedded in the control terminal through the FPGA when the implementation is performed, i.e., the structure shown in fig. 4.
In addition, the FPGA is used for simulating a plurality of receivers and sending simulation instructions in parallel through multiple channels of the receivers.
In addition, the FPGA is also used for processing intra-pulse characteristic data and/or self-checking information.
The digital domain-based radar warning device simulation system provided by the embodiment comprises a control terminal and a radar warning simulator.
The control terminal can realize the following functions:
a) battlefield electromagnetic environment scene setting
Setting information of a radiation source: a radiation source information table, a radiation source parameter table and a phased array radar working parameter table of a radiation source in a simulation scene can be set;
setting the position of a radiation source: the position, type and the like of the radiation source can be set;
the loader is provided with: the position, the posture and the like of the carrier can be set;
real-time simulation of a battlefield simulation environment: the battlefield environment is simulated in real time through parameters such as simulation time, a carrier, the position of a radiation source and the like, and simulated battlefield environment excitation data are issued to the radar alarm simulation board through a gigabit network.
b) Radar pulse signal simulation in the digital domain
PDW (pulse description word) data simulation: according to simulated battlefield environment data issued by control terminal software, PDW data is dynamically simulated and resolved by combining the working principle and performance of the broadband alarm receiver;
NPDW (narrow-band pulse description word) data simulation: according to a simulation scene, the NPDW data is dynamically simulated and solved according to the working principle and the performance of the narrow-band alarm receiver;
PSF (intra-pulse feature data) data simulation: according to the simulation scene, dynamically simulating and resolving PSF data according to the working principle and performance of the narrow-band alarm receiver;
c) state monitoring and display
And the state monitoring and displaying module is used for collecting and displaying data such as alarm radiation source parameter information output by other radar alarm processing platforms, relative position relation between the carrier and an alarm radiation source target and the like.
The control terminal of the embodiment can realize the following performances:
a) simulated radar pulse signal types: conventional pulse, frequency agility, multiple frequency spread, frequency diversity, pulse compression, pulse doppler, etc.;
b) simulated electromagnetic environment: up to 100 ten thousand pulses/second.
In addition, the digital domain-based radar warning device simulation system of the present embodiment may implement the functions as shown in fig. 5.
Control terminal software
And the control terminal software sets battlefield environment parameters through an interface, resolves and simulates to generate battlefield environment excitation data, transmits the resolved battlefield environment data to the radar alarm simulation board, and collects and displays simulation state information.
a) Battlefield environment incentive data settings: battlefield environment excitation data are set through an interface, wherein the battlefield environment excitation data comprise simulation propulsion time, carrier position, radiation source position and the like, and in addition, the battlefield environment excitation data also comprise input information setting during single function testing;
b) and (3) sending simulation state information: after each simulation propulsion is completed, collecting simulation state information for controlling terminal software to display the state, and preparing battlefield excitation data distribution and simulation propulsion at the next simulation moment;
c) battlefield environment incentive data resolving: according to the simulation propulsion time, the carrier position, the radiation source position and other information, battlefield data analysis and calculation are carried out by combining a radar radiation source information base (note: a radar radiation source data base used for radiation source identification is a subset of the radar radiation source information base);
d) monitoring and displaying: and monitoring the simulation time running condition and the upper computer model resolving condition, collecting and processing the simulation states of the board card, such as alarm target information, interference state and the like, and displaying the simulation states on an interface.
Embedded software
The embedded software is mainly responsible for receiving battlefield environment excitation resolving data issued by the control terminal software; according to the issued battlefield environment excitation data, performing data calculation on a radar radiation source information base and a space geometric relation; PDW data of four quadrant receivers corresponding to the same radiation source at the same emission moment are generated in real time, and the data are organized and issued to an FPGA; simulation yields PSF, etc.
a) Resolving a radar radiation source information base and space geometric relation data: according to the issued battlefield environment excitation data, a radar radiation source information base and a space geometric relation are calculated;
b) PDW data simulation: simulating PDW data measured and output by a broadband receiver, generating TOA, PA, PW and RF of each radiation source received by four quadrant receivers one by one according to a radar radiation source information base and a space geometric relation, filling RWR _ PDW, and organizing the data and issuing to FPGA;
c) and (3) organizing and issuing PDW data: simulating to generate self-checking information of the receiver, and the like;
d) simulation monitoring and data acquisition: the running condition of the interactive simulation time of the control terminal software is collected and processed, and the simulation state of the board card is reported to the control terminal software; in the function test, the FPGA reported data is collected and processed and transmitted to the control terminal software.
e) Receiver self-check information simulation
·FPGA
The FPGA is mainly responsible for the real-time interaction function of the data of the radar alarm simulation system, and comprises the steps of simulating 4 receivers to simultaneously send and process generated radar pulse data, intra-pulse characteristic data, self-checking information and the like.
a) PDW sends in parallel: RWR _ PWD combined data sent by the embedded software are cached through FIFO, the time sequence relation is strictly controlled according to quadrant numbers and TOA, and the data are sent to a radar signal processing platform through corresponding SRIO;
b) data transfer: intra-pulse characteristic data, self-checking information and the like.
If the specific implementation is performed by accessing to other radar alarm processing platforms, the digital domain-based radar alarm device simulation system provided by the embodiment is located above the other radar alarm processing platforms, as shown in fig. 6. Specifically, the digital domain-based radar warning device simulation system provided in this embodiment has the following working process: and the control terminal software receives the battlefield environment excitation data, and after the battlefield environment excitation data is set, the battlefield environment excitation data is resolved to simulate the PDW. After the embedded software organizes PDW data, on one hand, the FPGA sends the PDW data in parallel, and then the radar warning processing platform processes a radar signal sorting algorithm; and on the other hand, the embedded software is used for carrying out combat application instruction response.
After the combat application instruction responds, the embedded software performs receiver self-checking simulation on the first aspect, and performs data transfer on the second aspect through the FPGA, so that the radar alarm processing platform performs combat application. And in the third aspect, the embedded software can respond based on the combat application instruction, and data uploaded by the FPGA (such as combat application of data transfer performed by the FPGA, reference clock detection results performed by the FPGA and time synchronization signal processing results performed by the FPGA, wherein the combat application comes from a combat radar alarm processing platform, a reference clock detection object is a reference clock of the radar alarm processing platform, and a time synchronization signal processing object is a time synchronization signal of the radar alarm processing platform) are subjected to simulation monitoring and data acquisition, and further simulation state monitoring and simulation state information display are performed through control terminal software.
In addition, the simulation system of the radar warning device based on the digital domain provided by the embodiment can perform PDW pulse signal simulation, see fig. 7. Among these, the PDW pulse signal types include but are not limited to: conventional pulse, frequency agility, multiple frequency spread, frequency diversity, pulse compression, pulse doppler, etc. The primary radar targets include, but are not limited to: target indicating radar, fire control radar, guidance radar, radar guidance seeker.
a) Fixed PRI
The fixed carrier frequency pulse sequence TOA model is relatively simple, and the relationship between two adjacent pulse TOAs is expressed by the following formula.
TOAn＝TOAn-1+PRI+εn；
Wherein n is a pulse identifier, TOAnFor the nth pulse arrival time, TOAn-1For the (n-1) th pulse arrival time, epsilonnIs the nth pulse error.
Where the PRI remains constant.
b) Pulse-to-pulse variation PRI
The PRI stagger employs two or more PRIs, and generates a pulse sequence by sequentially and repeatedly using PRI values in a set of PRIs. Staggered PRI sequences can be characterized by a number of positions, which refers to the number of PRIs in the PRI sequence being repeated, and a number of levels, which refers to the number of different PRIs in the repeated PRI sequence, e.g., { PRI(1)，PRI(2)，PRI(3)Denotes the number of positions as 3 and the number of stages as 2. The relationship between the two pulse TOAs of the spread PRI is expressed by the following equation.
TOAn＝TOAn-1+PRI(n mod S)；
Wherein n is a pulse identifier, TOAnFor the time of arrival of the nth pulse,TOAn-1for the (n-1) th pulse arrival time, PRI()Is an inter-pulse spread sequence, S is a position number, and the position number is the number of elements in the inter-pulse spread sequence.
c) Jittered PRI
The PRI between pulses varies randomly around some fixed value (mean), and this amount of variation is called jitter and generally follows a Gaussian or uniform distribution. The random jitter amount can reach 30% of the PRI mean value at most. Therefore, the relationship between two adjacent pulses TOA is expressed as follows.
TOAn＝TOAn-1+PRI+tn；
Wherein n is a pulse identifier, TOAnFor the nth pulse arrival time, TOAn-1Is the (n-1) th pulse arrival time, tnThe jitter amount of the nth pulse.
Where PRI is a fixed value or PRI mean.
d) Fixed pulse width
The fixed pulse width pulse sequence is relatively simple and the relationship between two adjacent pulses PW is expressed by the following equation.
PW＝PWn+εn；
Wherein n is a pulse mark, PWnIs the pulse width of the nth pulse, ∈nIs the nth pulse error.
e) Variable pulse width
The variable pulse width simulation is realized in a PRI staggered scene, and the pulse width is periodically changed along with the change of the PRI.
f) Fixed carrier frequency
The carrier frequencies of adjacent pulses of the fixed carrier frequency pattern remain substantially the same. Therefore, in the PDW simulation, the carrier frequency front edge value RF is set to be constant and remains unchanged.
g) Rapid change of frequency between pulses
The carrier frequencies of adjacent pulses transmitted by the frequency agile radar change randomly and rapidly within a certain frequency band. Therefore, the carrier leading edge value of the PDW pulse is set to vary randomly around a certain fixed value (mean value).
RFn＝RFn-1+rfn；
Wherein n is pulseTowards the logo, RFnIs the leading edge value of the carrier frequency, RF, of the nth pulsen-1Carrier frequency leading edge value, rf, of the n-1 th pulsenThe carrier frequency leading edge value of the nth pulse varies.
h) DOA (Direction Of Arrival) simulation
Since variations in the local position can have an effect on the pulse angle of arrival, the effect of changes in the position of the T0 and T1 carriers on the receivers DOA0 and DOA1 is briefly described with reference to fig. 8.
i) Error simulation
Due to the stability of the device and the measurement error, after ideal PDW data is simulated according to the corresponding mode, error iterative simulation is carried out on the basis of the ideal condition.
If the time of arrival TOA is processed as follows:
wherein n is the pulse mark, TOAn is the arrival time of the nth pulse,
simulated nth pulse arrival time, δnRandom jitter, delta, not due to the factors considered for the nth pulsenTypically not more than 1% of the average PRI. Similar error handling is done for RF, PA, PW as well.
j) Antenna scanning
The antenna is an important component of radar, and is mainly used for radiating and receiving electromagnetic wave energy. The antenna scanning modes are mainly divided into two types: mechanical scanning and electronic scanning. The mechanical scanning mode is to scan different directions based on the mechanical rotation of the radar antenna, and the rotation of the antenna is usually repeated according to a certain period.
Therefore, in order to simulate the maximum pulse amplitude when the antenna is facing the receiver, the receiver is deviated from the main axis of the antenna as the antenna scans, the pulse amplitude is gradually reduced until the pulse amplitude disappears, and then the process is repeated. In the simulation of the PDW, the pulse amplitude PA and the arrival time TOA fluctuate along with the period, and the fluctuation period represents the rotation period of the antenna.
k) Loss of pulse
Modern electronic receiving devices, operating in a dense complex electromagnetic environment, always have some pulses lost. This situation is therefore also analyzed in order to simulate as realistic a scene as possible.
Assume a complete set of PDW pulse signals { PDW(1)，PDW(2)，PDW(3)，…，PDW(n)}, setting a random number i to PDW(i)And (4) setting the data to be null or 0 to perform analog simulation of the pulse loss condition.
In addition to the above analog contents, pulse group spread PRI, pulse group frequency agility, frequency diversity, and the like can be performed.
In addition, the digital domain-based radar warning device simulation system provided by the embodiment can perform monitoring and displaying.
The embedded software collects the related instruction information of the PPC and the FPGA, such as the battle simulation information, the alarm information, the interference guide instruction and the like, and uploads the instruction information to the upper computer to be displayed on an interface.
As shown in figure 9 of the drawings,
the user 1) imports a radiation source parameter information base, 2) inputs the number and the positions of radiation sources, 3) inputs the position of an aircraft, 4) inputs the start time and the end time of simulation, 5) inputs the simulation time interval, 6) selects whether to lose pulses and simulate errors, and 7) starts simulation.
The control terminal software 1) resolves battlefield environment excitation data (which may also be called as battlefield environment excitation data resolving in practical application, as shown in fig. 9), 2) simulates PDW data, and 3) sends the PDW data to the embedded software based on TCP protocol.
Embedded software 1) performs PDW data organization, and 2) sends the reorganized PDW data to the FPGA through SRIO (high speed serial IO port) x 4.
FPGA 1) unpacks PDW data, and 2) sends the PDW data to a radar alarm analysis processing platform in parallel through SRIO x 1.
The radar alarm analysis processing platform 1) selects the discernment processing, 2) the application of fighting, 3) the warning information generation, 4) transfers the instruction to FPGA through SRIO x 1.
The FPGA relays the instructions to the embedded software through SRIO x 4.
The embedded software 1) carries out alarm response time calculation, and 2) forwards alarm information to the control terminal software through a TCP protocol.
The control terminal software 1) receives the instruction information, 2) acquires the alarm target information, and 3) uploads the alarm target information to the control terminal software.
And displaying the simulation result to a user.
In order to solve the problems of low cost efficiency, few experiment times, weak controllability and the like of the radar warning system in outfield experiments and actual combat drilling, the simulation system of the radar warning device provided by the embodiment can simulate different battlefield environments, and can simulate the battlefield environment in real time to generate radar signals with different systems and quantities by configuring parameters of the battlefield environment through the control terminal, thereby being beneficial to performance evaluation of radar reconnaissance/warning processing units using different radar signal sorting algorithms and providing an experimental platform for development of actual equipment;
the digital domain-based radar warning device simulation system provided by the embodiment adopts a distributed simulation architecture, issues an instruction to embedded software running on a real-time operating system through control terminal software to simulate and generate a radar pulse signal on a digital domain, and then performs multi-channel parallel transmission by an FPGA. The control terminal software, the embedded software and the FPGA cooperate to perform simulation operation, so that the real-time performance of the simulation system is improved. The simulation system can simultaneously simulate the radar pulse signals of four radar receivers, and can simulate 100 ten thousand pulses/second at most.
The digital domain-based radar warning device simulation system provided by the embodiment can simulate different battlefield environments, can simulate the battlefield environment parameters through the control terminal, can simulate the battlefield environment to excite and generate radar signals with different systems and quantities in real time, is favorable for performance evaluation of radar warning processing units using different radar signal sorting algorithms, and provides an experimental platform for development of actual equipment.
The digital domain-based radar warning device simulation system provided by the embodiment can monitor and display the state, and control terminal software can collect data of warning instruction information, radiation source parameter information and the like output by the radar warning sorting platform and accordingly display the relative position relationship between a simulated carrier and a radiation source target in real time.
The digital domain-based radar warning device simulation system provided by the embodiment comprises: a radar alarm simulator and a control terminal; the control terminal is used for simulating battlefield environment excitation data; the radar warning simulator is used for simulating the battlefield environment according to the battlefield environment excitation data; the control terminal is also used for evaluating the performance of the radar warning device based on the simulated battlefield environment. The simulation environment parameter configuration can be flexibly changed through the radar warning simulator to carry out real-time battlefield simulation, and the real-time performance of the simulation generation of the radar signals with large data volume can be guaranteed through a radar warning device simulation system formed by the radar warning simulator and the control terminal.
It will be apparent to those skilled in the art that embodiments of the present application may be provided as a system. Accordingly, the present application may take the form of an entirely hardware embodiment, an entirely software embodiment or an embodiment combining software and hardware aspects. Furthermore, the present application may take the form of a computer program product embodied on one or more computer-usable storage media (including, but not limited to, disk storage, CD-ROM, optical storage, and the like) having computer-usable program code embodied therein. The scheme in the embodiment of the application can be implemented by adopting various computer languages, such as object-oriented programming language Java and transliterated scripting language JavaScript.
The present application is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the application. It will be understood that each flow and/or block of the flow diagrams and/or block diagrams, and combinations of flows and/or blocks in the flow diagrams and/or block diagrams, can be implemented by computer program instructions. These computer program instructions may be provided to a processor of a general purpose computer, special purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, create means for implementing the functions specified in the flowchart flow or flows and/or block diagram block or blocks.
While the preferred embodiments of the present application have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all alterations and modifications as fall within the scope of the application.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present application without departing from the spirit and scope of the application. Thus, if such modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is intended to include such modifications and variations as well.
Claims (32)
1. A digital domain based radar warning device simulation system, the system comprising: a radar alarm simulator and a control terminal;
the control terminal is used for simulating battlefield environment excitation data;
the radar warning simulator is used for simulating a battlefield environment according to the battlefield environment excitation data;
the control terminal is further used for evaluating the performance of the radar warning equipment based on the simulated battlefield environment.
2. The system according to claim 1, wherein the control terminal comprises: controlling terminal software and embedded software;
the control terminal software is used for generating a radar pulse signal based on the battlefield environment excitation data;
the embedded software is used for simulating the radar pulse signals in a digital domain and sending the simulated radar pulse signals to the radar alarm simulator through the gigabit network.
3. The system of claim 2, wherein the radar warning simulator is configured to perform battlefield environment simulation according to simulation instructions.
4. The system of claim 2, wherein the control terminal software is configured to generate a radar pulse signal based on the battlefield environment excitation data, comprising:
the control terminal software receives battlefield environment excitation data or sets the battlefield environment excitation data;
the control terminal analyzes and resolves the battlefield environment excitation data by combining with a radar radiation source information base;
and the control terminal software generates a radar pulse signal according to the analysis settlement result.
5. The system of claim 1, 2 or 4, wherein the battlefield environment incentive data comprises: simulating propulsion time, radiation source information and carrier information.
6. The system of claim 5, wherein the radiation source information comprises one or more of: a radiation source information table, a radiation source parameter table, a phased array radar working parameter table, a radiation source position and a radiation source type;
the carrier information includes a carrier position and/or a carrier attitude.
7. The system of claim 4, wherein after the control terminal software generates the radar pulse signal according to the analysis and settlement result, the method further comprises:
and the control terminal software collects simulation state information of the radar warning equipment in a simulated battlefield environment.
8. The system of claim 7, wherein after the control terminal software collects simulation status information of the radar warning device in the simulated battlefield environment, further comprising:
and the control terminal software displays the simulation state information.
9. The system of claim 7 or 8, wherein the simulation state information comprises one or more of: the method comprises the steps of obtaining radiation source parameter information, the relative position relation between a carrier and a warning radiation source target, the simulation time running condition, the upper computer model resolving condition, the simulation state of a processing board card and data reported by a radar warning simulator.
10. The system of claim 9, wherein the simulation status of the processing board comprises alarm target information of the processing board and/or an interference status of the processing board.
11. The system of claim 2 or 4, wherein the type of pulse signal comprises one or more of: conventional pulse, frequency agility, multiple frequency spread, frequency diversity, pulse compression, pulse doppler.
12. The system of claim 11, wherein the pulse signal generates 100 tens of thousands per second.
13. The system of claim 2, wherein the radar pulse signal is a Pulse Description Word (PDW) pulse signal.
14. The system of claim 13, wherein the embedded software simulates the radar pulse signal in the digital domain, comprising:
the embedded software generates PDW pulse signals of four quadrant receivers corresponding to the same radiation source at the same emission time in real time in a digital domain.
15. The system of claim 14, wherein the embedded software is further configured to perform receiver self-test simulation.
16. The system of claim 14, wherein the embedded software is further configured to simulate an intra-pulse signature data PSF pulse signal.
17. The system of claim 16, wherein the embedded software simulates a PSF pulse signal comprising:
the embedded software dynamically simulates and solves the PSF pulse signal according to a simulation scene and by combining the working principle and the performance of the narrow-band alarm receiver.
18. The system of claim 14, wherein the embedded software is further configured to interact with the control terminal software to simulate running conditions of time, collect the simulation state of the processing board, and report the simulation state of the processing board to the control terminal software.
19. The system according to claim 14, wherein the embedded software is further configured to collect and process data reported by the radar alarm emulator, and report the data reported by the radar alarm emulator to the control terminal software.
20. The system of claim 3, wherein the radar warning emulator is a radar warning emulation board.
21. The system of claim 20, wherein the radar warning emulator employs a reduced instruction set architecture central processing unit (PPC) plus a Field Programmable Gate Array (FPGA) architecture;
the radar alarm simulator is composed of a PPC, an FPGA, a DDR3, a FLASH memory FLASH, a micro control unit MCU, a photoelectric conversion device and a power conversion chip;
the radar warning simulator comprises 9 groups of mechanical transfer MT type optical interfaces, 1 path of RS422 communication interfaces, 14 paths of 422 bidirectional differential pulses, 4 paths of 422 unidirectional output differential pulses, 1 path of RS232 communication interfaces and 1 path of gigabit network debugging interfaces.
22. The system of claim 21, wherein the embedded software is configured to simulate radar pulse signals in the digital domain, and to transmit the simulated radar pulse signals to the FPGA via the gigabit network;
and the FPGA is used for simulating the battlefield environment according to the simulation instruction.
23. The system of claim 22, wherein the FPGA is configured to simulate a plurality of receivers, and wherein the simulation instructions are transmitted in parallel via multiple channels of the receivers.
24. The system of claim 23, wherein the FPGA is further configured for intra-pulse feature data processing and/or self-test information processing.
25. The system of claim 13, wherein the control terminal software is configured to generate a PDW pulse signal at a fixed pulse repetition interval PRI based on the battlefield environment excitation data;
the pulse arrival time of the PDW pulse signal satisfies the following relation:
TOAn＝TOAn-1+PRI+εn；
wherein n is a pulse identifier, TOAnFor the nth pulse arrival time, TOAn-1For the (n-1) th pulse arrival time, epsilonnIs the nth pulse error.
26. The system of claim 13, wherein the control terminal software is configured to generate a PDW pulse signal of an inter-pulse spread PRI based on the battlefield environment excitation data;
TOAn＝TOAn-1+PRI(n mod S)；
wherein n is a pulse identifier, TOAnFor the nth pulse arrival time, TOAn-1For the (n-1) th pulse arrival time, PRI()Is an inter-pulse spread sequence, S is a position number, and the position number is the number of elements in the inter-pulse spread sequence.
27. The system of claim 13, wherein the control terminal software is configured to generate a jittered PRI PDW pulse signal based on the battlefield environment excitation data;
TOAn＝TOAn-1+PRI+tn；
wherein n is a pulse identifier, TOAnFor the nth pulse arrival time, TOAn-1Is the (n-1) th pulse arrival time, tnThe jitter amount of the nth pulse.
28. The system of claim 25 or 26 or 27, wherein the control terminal software is further configured to perform iterative simulation of the error in the pulse arrival time by:
wherein n is a pulse identifier, TOAnFor the time of arrival of the nth pulse,
simulated nth pulse arrival time, δnRandom jitter due to the nth pulse is not considered a factor.
29. The system of claim 13, wherein the control terminal software is configured to generate a PDW pulse signal of fixed pulse width PW based on the battlefield environment excitation data;
the PW of the PDW pulse signal satisfies the following relation:
PW＝PWn+εn；
wherein n is a pulse mark, PWnIs the pulse width of the nth pulse, ∈nIs the n-thPulse error.
30. The system of claim 13, wherein the control terminal software is configured to generate a PDW pulse signal having a periodically varying pulse width PW based on the battlefield environment excitation data.
31. The system of claim 13, wherein the control terminal software is configured to generate a PDW pulse signal at a fixed carrier leading edge value based on the battlefield environment excitation data.
32. The system of claim 13, wherein the control terminal software is configured to generate an inter-pulse frequency agile PDW pulse signal based on the battlefield environment excitation data;
the carrier frequency leading edge value RF of the PDW pulse signal satisfies the following relation:
RFn＝RFn-1+rfn；
wherein n is a pulse marker, RFnIs the leading edge value of the carrier frequency, RF, of the nth pulsen-1Carrier frequency leading edge value, rf, of the n-1 th pulsenThe carrier frequency leading edge value of the nth pulse varies.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115267373A (en) * | 2022-06-17 | 2022-11-01 | 成都中创锐科信息技术有限公司 | Radiation source dynamic scene simulation method and device based on vector signal generation device |
| CN116736248A (en) * | 2023-08-16 | 2023-09-12 | 航宇伟创科技(北京)有限公司 | Full-pulse radar signal simulation method, radar signal simulator and host thereof |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115267373A (en) * | 2022-06-17 | 2022-11-01 | 成都中创锐科信息技术有限公司 | Radiation source dynamic scene simulation method and device based on vector signal generation device |
| CN115267373B (en) * | 2022-06-17 | 2023-04-07 | 成都中创锐科信息技术有限公司 | Radiation source dynamic scene simulation method and device based on vector signal generation device |
| CN116736248A (en) * | 2023-08-16 | 2023-09-12 | 航宇伟创科技(北京)有限公司 | Full-pulse radar signal simulation method, radar signal simulator and host thereof |
| CN116736248B (en) * | 2023-08-16 | 2023-11-14 | 航宇伟创科技(北京)有限公司 | Full-pulse radar signal simulation method, radar signal simulator and host thereof |
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