Radio frequency simulation dynamic game anti-interference environment simulation system and method

Abstract

The invention relates to the technical field of radar radiation type system simulation, and particularly discloses a radio frequency simulation dynamic game anti-interference environment simulation system and method. According to the interference environment simulation system architecture and the interference environment simulation method, environment signal detection is achieved, real-time dynamic updating of interference performance can be achieved according to detection results and confrontation strategy analysis and adjustment, dynamic game confrontation environment simulation can be achieved in radio frequency simulation, real battlefield interference environment signals can be simulated more vividly, and the interference performance of a battlefield is improved. The method provides support for performance evaluation of radar equipment in a complex electromagnetic environment, and has good popularization and application values.

Description

Technical Field

[0001] The present invention relates to the technical field of radar radiation system simulation, and specifically discloses a radio frequency simulation dynamic game counter-interference environment simulation system and method. Background Art

[0002] With the continuous development of software radio technology, the electromagnetic environment faced by radar systems has become increasingly complex. At present, intelligent radars with cognitive detection and reasoning evolution have become a research hotspot at home and abroad. Intelligent technology not only improves the radar's anti-interference ability, target detection ability and battlefield survivability, but also enables radar to develop gradually, thereby achieving iterative evolution and continuous upgrading. The application and development of intelligent technology has improved radar performance, but we must also see that the application of intelligent technology in the field of electronic warfare has also made radar face a more complex electromagnetic environment. Complex electromagnetic environment is a decisive factor restricting radar combat performance. Electromagnetic signals such as active and passive interference released by the enemy, unintentional electromagnetic radiation from electronic equipment on both sides, and natural electromagnetic interference may enter the radar, affecting the radar receiving link, signal processing, data processing and other links, causing radar performance to decline or fail, thereby affecting the entire battlefield situation. A large number of facts show that complex electromagnetic environment is an important factor leading to the decline in the function of radar equipment and even failure.

[0003] The performance test of radar system in complex electromagnetic environment can be carried out by various means such as field actual equipment confrontation, indoor semi-physical simulation experiment and digital simulation experiment. Among them, semi-physical simulation experiment has attracted wide attention due to its high confidentiality, low experimental cost and high efficiency and low consumption. When using RF semi-physical simulation system to carry out simulation experiment, it is necessary to use simulation equipment to build a complex electromagnetic environment for radar equipment in a dark room. Traditional simulation equipment mainly includes target echo signal simulation equipment, radiation source signal simulation equipment and interference environment simulation equipment. Among them, interference environment simulation equipment is the main equipment for confrontation environment simulation. Its complex confrontation environment simulation capability directly affects the performance test of radar system. Limited by hardware simulation capability and computing resource limitations, traditional interference environment simulation equipment mostly uses parameterized settings to realize interference signal simulation, and has typical suppression interference and deception interference signal simulation capabilities. Its interference signal simulation performance depends on the hardware capability of the simulation equipment, lacks real-time analysis of interference performance in complex confrontation environment, and cannot adjust interference signal style and interference strategy in time when interference confrontation effect is not good, and lacks the ability to build complex confrontation environment. Summary of the invention

[0004] In order to solve the problems in the background technology, the present invention discloses a radio frequency simulation dynamic game countermeasure interference environment simulation system and method, which can realize dynamic game countermeasure environment simulation in radio frequency simulation, more realistically simulate the real battlefield interference environment signal, and provide support for the performance evaluation of radar equipment in complex electromagnetic environment.

[0005] In order to achieve the above-mentioned invention object, the present invention adopts the following technical scheme:

[0006] A radio frequency simulation dynamic game countermeasure interference environment simulation system includes an integrated radio frequency module, an intermediate frequency signal acquisition and storage module, an intelligent confrontation module, a game confrontation environment generation module, a receiving antenna and a transmitting antenna, wherein:

[0007] The integrated RF module is used to realize the conversion between RF signals and IF signals. It down-converts the radar transmission signal received by the receiving antenna into an IF signal and then sends it to the IF signal acquisition and storage module. It up-converts the IF interference signal sent by the game confrontation environment generation module into an RF signal and transmits it through the transmitting antenna.

[0008] The intermediate frequency signal acquisition and storage module is used to realize the analog-to-digital conversion of the intermediate frequency radar signal, store the radar digital signal and send the data to the intelligent countermeasure module;

[0009] The intelligent confrontation module measures the amplitude, power, arrival time, and pulse width parameters of the received digital radar signal to obtain radar parameter measurement results, analyzes and identifies the radar working mode based on the measurement results, and sends the radar parameter measurement results and radar working mode identification results to the game confrontation environment generation module;

[0010] The game confrontation environment generation module generates interference data according to the received radar working mode recognition results and radar parameter measurement results according to the set confrontation strategy, and after completing the digital-to-analog conversion of the digital interference signal and the intermediate frequency interference signal, sends the intermediate frequency interference signal to the integrated RF module.

[0011] Furthermore, in the RF simulation dynamic game countermeasure interference environment simulation system, the intermediate frequency signal acquisition and storage module includes an acquisition unit and a storage unit. The acquisition unit is used to complete the analog-to-digital conversion of the intermediate frequency radar signal, and the storage unit is used to store the radar digital signal and send the data to the parameter measurement unit of the intelligent countermeasure module for basic parameter measurement.

[0012] Furthermore, in the RF simulation dynamic game countermeasure interference environment simulation system, the intelligent countermeasure module also includes a working mode analysis unit, a parameter measurement unit receives the digital radar signal sent by the storage unit, and measures and analyzes the amplitude, power, arrival time, and pulse width parameters of the signal. The working mode analysis unit analyzes and identifies the radar working mode based on the analysis result of the parameter measurement unit, and sends the result to the countermeasure strategy analysis unit of the game countermeasure environment generation module.

[0013] Furthermore, in the RF simulation dynamic game countermeasure interference environment simulation system, the game countermeasure environment generation module also includes a signal generation unit, and the countermeasure strategy analysis unit generates interference data according to the radar working mode recognition result and the received radar digital signal according to the set countermeasure strategy. After the signal generation unit completes the digital-to-analog conversion of the digital interference signal and the intermediate frequency interference signal, the intermediate frequency interference signal is sent to the integrated RF module.

[0014] Furthermore, the RF simulation dynamic game counter-interference environment simulation system, the integrated RF module includes an up-conversion unit and a down-conversion unit, the down-conversion unit is used to down-convert the radar transmission signal received by the receiving antenna into an intermediate frequency signal and send it to the acquisition unit, the up-conversion unit up-converts the intermediate frequency interference signal sent by the signal generation unit into a RF signal and transmits it through the transmitting antenna.

[0015] Furthermore, in the radio frequency simulation dynamic game counter-interference environment simulation system, the integrated radio frequency module also includes a frequency synthesis unit, which provides local oscillator and clock signals for the up-conversion unit and the down-conversion unit.

[0016] A method for simulating a radio frequency simulation dynamic game against interference environment, using any one of the radio frequency simulation dynamic game against interference environment simulation systems described above to implement dynamic game against interference environment simulation in radio frequency simulation, the specific method is as follows:

[0017] 1) The receiving antenna receives the radar transmission signal. Assume that the linear signal transmitted by the radar is

[0018] S(t)=Acos(2πf0t+kπt 2 )(1.1)

[0019] Where: f0 is the center frequency of the radar transmission signal, k is the signal frequency modulation slope, and A is the signal amplitude;

[0020] 2) The down-conversion unit of the integrated RF module completes the down-conversion of the radar transmission signal and converts the RF signal into an intermediate frequency signal. The acquisition unit of the intermediate frequency signal acquisition and storage module converts the intermediate frequency signal into a digital signal. The storage unit stores the radar digital signal and sends the data to the parameter measurement unit of the intelligent countermeasure module for basic parameter measurement.

[0021] 3) The parameter measurement unit of the intelligent countermeasure module receives the digital radar signal sent by the storage unit and measures the frequency, arrival time, amplitude, and pulse width parameters of the signal;

[0022] 4) The working mode analysis unit of the intelligent countermeasure module analyzes and identifies the radar working mode based on the analysis results of the parameter measurement unit, and determines whether the radar working state is tracking state or search state according to the amplitude measurement results and arrival time;

[0023] 5) The intelligent confrontation module sends the radar parameter measurement results in step 3) and the radar working state judgment results in step 4) to the confrontation strategy analysis unit of the game confrontation environment generation module;

[0024] 6) The confrontation strategy analysis unit of the game confrontation environment generation module intelligently selects the confrontation strategy according to the above analysis results and the current working status of the interference simulation device;

[0025] 7) The signal generation unit of the game confrontation environment generation module converts the digital interference signal into an intermediate frequency interference signal and sends it to the up-conversion unit of the integrated radio frequency module;

[0026] 8) The up-conversion unit of the integrated RF module converts the intermediate frequency interference signal into a radio frequency interference signal and sends it to the transmitting antenna for radiation.

[0027] Furthermore, the radio frequency simulation dynamic game countermeasure interference environment simulation method is characterized in that: in step 3),

[0028] 3.1) When performing frequency measurement, in order to overcome the limitation of the traditional method of using the maximum value of the discrete signal spectrum as the frequency measurement result output, when using FFT to perform spectrum analysis on the digital signal, the two largest values ​​of the discrete signal spectrum X(1) and X(2) are selected, and the final frequency measurement result is calculated using the following formula (1.2):

[0029]

[0030] Wherein, the plus sign is taken when the peak position of X(1) is before X(2), otherwise the minus sign is taken, and f0′ is the estimated value of the center frequency f0 of the radar transmission signal;

[0031] 3.2) When measuring amplitude, in order to overcome the limitation of inaccurate amplitude measurement caused by amplitude weighting of fixed threshold, adaptive threshold is used to complete signal amplitude measurement. First, based on the fixed threshold, an amplitude value PA1 is roughly calculated by weighted average. Then PA1 / 2 is taken as the threshold, and the amplitude value PA2′ is re-weighted averaged. PA2′ is the estimated value of radar signal amplitude A.

[0032] 3.3) When measuring the arrival time and pulse width, half of the maximum pulse amplitude is used as the time reference for judging the leading and trailing edges of the pulse based on the amplitude measurement. The time TOA1 of the leading edge of the pulse is used as the estimated value of the pulse arrival time, and the difference PW1′ between the trailing edge and the leading edge of the pulse is used as the estimated value of the pulse width.

[0033] Furthermore, in the radio frequency simulation dynamic game countermeasure interference environment simulation method, in step 4), the specific method for judging the working state of the radar according to the amplitude measurement result and the arrival time is as follows:

[0034] 4.1) Assume that the amplitude measurement results of n pulses are PA2′(k), k=1,2,...n, and find the maximum value PA′ in the measurement results. max ;

[0035] 4.2) PA′ max -0.5 is the threshold value. Find the arrival time sequence greater than the threshold in the arrival time sequence TOA2′(k), k=1,2,...n, and obtain the arrival time TOA2′(m), m=1,2,...M corresponding to the maximum amplitude;

[0036] 4.3) With pulse repetition period T PRF is the clustering threshold, and the arrival time TOA2′(m), m=1,2,...M is clustered. If TOA2′(m+1)-TOA2′(m)≤T PRF , then retain TOA2′(m), remove TOA2′(m+1) from the sequence, and after traversing M arrival times, obtain the arrival time sequence TOA2′(n) that takes into account the antenna main lobe scanning process;

[0037] 4.4) Radar antenna scanning period T scan TOA2′(n+1)-TOA2′(n);

[0038] 4.5) If the antenna scanning period is T scan ≤100ms, the radar is judged to be in tracking state, and the tracking data rate is 1 / T scan , otherwise it is judged that the radar is in search state.

[0039] Furthermore, in the RF simulation dynamic game countermeasure interference environment simulation method, in step 6), if the radar is in a searching state, the current interference strategy is maintained unchanged, and the digital interference signal continues to be sent to the signal generating unit; if the radar is in a tracking state, the interference strategy is adjusted and optimized according to the dynamic game countermeasure principle, and the regenerated digital interference signal is sent to the signal generating unit.

[0040] Compared with the prior art, the present invention has the following beneficial effects:

[0041] The radio frequency simulation dynamic game countermeasure interference environment simulation system and method disclosed in the present invention provide an interference environment simulation system architecture and method that can detect environmental signals and realize real-time dynamic update of interference performance according to the detection results and countermeasure strategy analysis and adjustment. It can realize dynamic game countermeasure environment simulation in radio frequency simulation, simulate the real battlefield interference environment signal more realistically, provide support for performance evaluation of radar equipment in complex electromagnetic environment, and has good promotion and application value. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, 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.

[0043] Figure 1 It is a schematic diagram of the framework of the radio frequency simulation dynamic game counter-interference environment simulation system of the present invention. DETAILED DESCRIPTION

[0044] In order to better understand the present invention, the content of the present invention is further clearly set forth in conjunction with the embodiments below, but the protection content of the present invention is not limited to the following embodiments. In the following description, a large number of specific details are provided in order to provide a more thorough understanding of the present invention. However, it is obvious to those skilled in the art that the present invention can be implemented without one or more of these details.

[0045] Combined with Figure 1 , the present invention elaborates in detail a radio frequency simulation dynamic game countermeasure interference environment simulation system, including a comprehensive radio frequency module, an intermediate frequency signal acquisition and storage module, an intelligent confrontation module, a game confrontation environment generation module, a receiving antenna and a transmitting antenna, wherein,

[0046] The integrated RF module is used to realize the conversion between RF signal and intermediate frequency signal. The integrated RF module includes an up-conversion unit, a down-conversion unit and a frequency synthesis unit. The frequency synthesis unit provides local oscillator and clock signal for the up-conversion unit and the down-conversion unit. The down-conversion unit is used to down-convert the radar transmission signal received by the receiving antenna into an intermediate frequency signal and send it to the acquisition unit. The up-conversion unit up-converts the intermediate frequency interference signal sent by the signal generation unit into a RF signal and transmits it through the transmitting antenna.

[0047] The intermediate frequency signal acquisition and storage module is mainly used to realize the analog-to-digital conversion of the intermediate frequency radar signal and store the digital signal. The intermediate frequency signal acquisition and storage module includes an acquisition unit and a storage unit. The acquisition unit is used to complete the analog-to-digital conversion of the intermediate frequency radar signal. The storage unit is used to store the radar digital signal and send the data to the parameter measurement unit of the intelligent countermeasure module for basic parameter measurement;

[0048] The intelligent confrontation module is mainly used for signal parameter measurement and radar working mode analysis, providing support for intelligent game decision-making. The intelligent confrontation module includes a parameter measurement unit and a working mode analysis unit. The parameter measurement unit receives the digital radar signal sent by the storage unit, and measures and analyzes the amplitude, power, arrival time, and pulse width parameters of the signal to obtain radar parameter measurement results. The working mode analysis unit analyzes and identifies the radar working mode based on the analysis results of the parameter measurement unit, and sends the radar parameter measurement results and working mode identification results to the confrontation strategy analysis unit of the game confrontation environment generation module;

[0049] The game confrontation environment generation module is mainly used for dynamic game confrontation interference environment generation. The game confrontation environment generation module includes a confrontation strategy analysis unit and a signal generation unit. The confrontation strategy analysis unit generates interference data according to the radar working mode recognition results and the received radar parameter measurement results according to the set confrontation strategy. After the signal generation unit completes the digital-to-analog conversion of the digital interference signal and the intermediate frequency interference signal, the intermediate frequency interference signal is sent to the integrated RF module.

[0050] A method for simulating a radio frequency simulation dynamic game against interference environment, using any one of the radio frequency simulation dynamic game against interference environment simulation systems described above to implement dynamic game against interference environment simulation in radio frequency simulation, the specific method is as follows:

[0051] 1) RF simulation dynamic game against interference environment simulation system power on, self-test, the receiving antenna receives the radar transmission signal, assuming that the linear signal transmitted by the radar is

[0052] S(t)=Acos(2πf0t+kπt 2 )(1.1)

[0053] Where: f0 is the center frequency of the radar transmission signal, k is the signal frequency modulation slope, and A is the signal amplitude;

[0054] 2) The down-conversion unit of the integrated RF module completes the down-conversion of the radar transmission signal and converts the RF signal into an intermediate frequency signal. The acquisition unit of the intermediate frequency signal acquisition and storage module converts the intermediate frequency signal into a digital signal. The storage unit stores the radar digital signal and sends the data to the parameter measurement unit of the intelligent countermeasure module for basic parameter measurement.

[0055] 3) The parameter measurement unit of the intelligent countermeasure module receives the digital radar signal sent by the storage unit and measures the frequency, arrival time, amplitude, and pulse width parameters of the signal:

[0056] 3.1) When performing frequency measurement, in order to overcome the limitation of the traditional method of using the maximum value of the signal spectrum after discretization as the frequency measurement result output, when using FFT to perform spectrum analysis on digital signals, the two largest values ​​of the signal spectrum after discretization, X(1) and X(2), are selected, and the final frequency measurement result is calculated using the following formula (1.2):

[0057]

[0058] Wherein, the plus sign is taken when the peak position of X(1) is before X(2), otherwise the minus sign is taken, and f0′ is the estimated value of the center frequency f0 of the radar transmission signal;

[0059] 3.2) When measuring amplitude, in order to overcome the limitation of inaccurate amplitude measurement caused by amplitude weighting of fixed threshold, adaptive threshold is used to complete signal amplitude measurement. First, based on the fixed threshold, an amplitude value PA1 is roughly calculated by weighted average. Then PA1 / 2 is taken as the threshold, and the amplitude value PA2′ is re-weighted averaged. PA2′ is the estimated value of radar signal amplitude A.

[0060] 3.3) When measuring the arrival time and pulse width, half of the maximum value of the pulse amplitude is used as the time reference for judging the front and rear edges of the pulse on the basis of the amplitude measurement, the time TOA1 of the pulse front edge is used as the estimated value of the pulse arrival time, and the difference PW1′ between the rear edge and the front edge of the pulse is used as the estimated value of the pulse width;

[0061] 4) The working mode analysis unit of the intelligent countermeasure module analyzes and identifies the radar working mode based on the analysis results of the parameter measurement unit, and determines the working status of the radar according to the amplitude measurement results and arrival time:

[0062] 4.1) Assume that the amplitude measurement results of n pulses are PA2′(k), k=1,2,...n, and find the maximum value PA′ in the measurement results. max ;

[0063] 4.2) PA′ max -0.5 is the threshold value. Find the arrival time sequence greater than the threshold in the arrival time sequence TOA2′(k), k=1,2,...n, and obtain the arrival time TOA2′(m), m=1,2,...M corresponding to the maximum amplitude;

[0064] 4.3) With pulse repetition period T PRFis the clustering threshold, and the arrival time TOA2′(m), m=1,2,...M is clustered. If TOA2′(m+1)-TOA2′(m)≤T PRF , then retain TOA2′(m), remove TOA2′(m+1) from the sequence, and after traversing M arrival times, obtain the arrival time sequence TOA2′(n) that takes into account the antenna main lobe scanning process;

[0065] 4.4) Radar antenna scanning period T scan TOA2′(n+1)-TOA2′(n);

[0066] 4.5) If the antenna scanning period is T scan ≤100ms, the radar is judged to be in tracking state, and the tracking data rate is 1 / T scan , otherwise it is judged that the radar is in the search state;

[0067] 5) The intelligent confrontation module sends the radar parameter measurement results in step 3) and the radar working state judgment results in step 4) to the confrontation strategy analysis unit of the game confrontation environment generation module;

[0068] 6) The confrontation strategy analysis unit of the game confrontation environment generation module intelligently selects the confrontation strategy based on the above analysis results and the current working status of the interference simulation device: if the radar is in the search state, the current interference strategy is maintained unchanged, and the digital interference signal continues to be sent to the signal generation unit; if the radar is in the tracking state, the interference strategy is adjusted and optimized according to the dynamic game confrontation principle, and the regenerated digital interference signal is sent to the signal generation unit;

[0069] 7) The signal generation unit of the game confrontation environment generation module converts the digital interference signal into an intermediate frequency interference signal and sends it to the up-conversion unit of the integrated radio frequency module;

[0070] 8) The up-conversion unit of the integrated RF module converts the intermediate frequency interference signal into a radio frequency interference signal and sends it to the transmitting antenna for radiation.

[0071] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention rather than to limit it. Other modifications or equivalent substitutions made to the technical solution of the present invention by ordinary technicians in the field should be included in the scope of the claims of the present invention as long as they do not depart from the spirit and scope of the technical solution of the present invention.

Claims

1. A radio frequency simulation dynamic game counter-interference environment simulation system, characterized by: Include Integrated RF module, intermediate frequency signal acquisition and storage module, intelligent confrontation module, game confrontation environment generation module, receiving antenna and transmitting antenna, among which, The integrated RF module is used to realize the conversion between RF signals and IF signals. It down-converts the radar transmission signal received by the receiving antenna into an IF signal and then sends it to the IF signal acquisition and storage module. It up-converts the IF interference signal sent by the game confrontation environment generation module into an RF signal and transmits it through the transmitting antenna. The intermediate frequency signal acquisition and storage module is used to realize the analog-to-digital conversion of the intermediate frequency radar signal, store the radar digital signal and send the data to the intelligent countermeasure module; The intelligent confrontation module measures the amplitude, power, arrival time, and pulse width parameters of the received digital radar signal to obtain radar parameter measurement results, analyzes and identifies the radar working mode based on the measurement results, and sends the radar parameter measurement results and radar working mode identification results to the game confrontation environment generation module; The game confrontation environment generation module generates interference data according to the received radar working mode recognition results and radar parameter measurement results according to the set confrontation strategy, and after completing the digital-to-analog conversion of the digital interference signal and the intermediate frequency interference signal, sends the intermediate frequency interference signal to the integrated RF module.

2. The radio frequency simulation dynamic game counter-interference environment simulation system according to claim 1 is characterized in that: The intermediate frequency signal acquisition and storage module consists of an acquisition unit and a storage unit. The acquisition unit is used to complete the analog-to-digital conversion of the intermediate frequency radar signal, and the storage unit is used to store the radar digital signal and send the data to the parameter measurement unit of the intelligent countermeasure module for basic parameter measurement.

3. The radio frequency simulation dynamic game counter-interference environment simulation system according to claim 2 is characterized in that: The intelligent confrontation module also includes a working mode analysis unit. The parameter measurement unit receives the digital radar signal sent by the storage unit and measures and analyzes the amplitude, power, arrival time, and pulse width parameters of the signal. The working mode analysis unit analyzes and identifies the radar working mode based on the analysis results of the parameter measurement unit and sends the results to the confrontation strategy analysis unit of the game confrontation environment generation module.

4. The radio frequency simulation dynamic game counter-interference environment simulation system according to claim 3 is characterized by: The game confrontation environment generation module also includes a signal generation unit. The confrontation strategy analysis unit generates interference data according to the radar working mode recognition results and the received radar digital signal according to the set confrontation strategy. After the signal generation unit completes the digital-to-analog conversion of the digital interference signal and the intermediate frequency interference signal, the intermediate frequency interference signal is sent to the integrated RF module.

5. The radio frequency simulation dynamic game counter-interference environment simulation system according to claim 4 is characterized in that: The integrated RF module includes an up-conversion unit and a down-conversion unit. The down-conversion unit is used to down-convert the radar transmission signal received by the receiving antenna into an intermediate frequency signal and send it to the acquisition unit. The up-conversion unit up-converts the intermediate frequency interference signal sent by the signal generation unit into an RF signal and transmits it through the transmitting antenna.

6. The radio frequency simulation dynamic game counter-interference environment simulation system according to claim 5 is characterized by: The integrated radio frequency module also includes a frequency synthesis unit, which provides local oscillator and clock signals for the up-conversion unit and the down-conversion unit.

7. A method for simulating a radio frequency simulation dynamic game against interference environment, characterized by: The RF simulation dynamic game countermeasure interference environment simulation system described in any one of claims 1 to 6 is used to realize dynamic game countermeasure environment simulation in RF simulation, and the specific method is as follows: 1) The receiving antenna receives the radar transmission signal. Assume that the linear signal transmitted by the radar is S(t)=Acos(2πf0t+kπt 2 )(1.1) Where: f0 is the center frequency of the radar transmission signal, k is the signal frequency modulation slope, and A is the signal amplitude; 2) The down-conversion unit of the integrated RF module completes the down-conversion of the radar transmission signal and converts the RF signal into an intermediate frequency signal. The acquisition unit of the intermediate frequency signal acquisition and storage module converts the intermediate frequency signal into a digital signal. The storage unit stores the radar digital signal and sends the data to the parameter measurement unit of the intelligent countermeasure module for basic parameter measurement. 3) The parameter measurement unit of the intelligent countermeasure module receives the digital radar signal sent by the storage unit and measures the frequency, arrival time, amplitude, and pulse width parameters of the signal; 4) The working mode analysis unit of the intelligent countermeasure module analyzes and identifies the radar working mode based on the analysis results of the parameter measurement unit, and determines whether the radar working state is tracking state or search state according to the amplitude measurement results and arrival time; 5) The intelligent confrontation module sends the radar parameter measurement results in step 3) and the radar working state judgment results in step 4) to the confrontation strategy analysis unit of the game confrontation environment generation module; 6) The confrontation strategy analysis unit of the game confrontation environment generation module intelligently selects the confrontation strategy according to the above analysis results and the current working status of the interference simulation device; 7) The signal generation unit of the game confrontation environment generation module converts the digital interference signal into an intermediate frequency interference signal and sends it to the up-conversion unit of the integrated radio frequency module; 8) The up-conversion unit of the integrated RF module converts the intermediate frequency interference signal into a radio frequency interference signal and sends it to the transmitting antenna for radiation.

8. The method for simulating a radio frequency simulation dynamic game against interference environment according to claim 7 is characterized in that: In step 3), 3.1) When performing frequency measurement, in order to overcome the limitation of the traditional method of using the maximum value of the signal spectrum after discretization as the frequency measurement result output, when using FFT to perform spectrum analysis on digital signals, the two largest values ​​of the signal spectrum after discretization, X(1) and X(2), are selected, and the final frequency measurement result is calculated using the following formula: Wherein, the plus sign is taken when the peak position of X(1) is before X(2), otherwise the minus sign is taken, and f0′ is the estimated value of the center frequency f0 of the radar transmission signal; 3.2) When measuring amplitude, in order to overcome the limitation of inaccurate amplitude measurement caused by amplitude weighting of fixed threshold, adaptive threshold is used to complete signal amplitude measurement. First, based on the fixed threshold, an amplitude value PA1 is roughly calculated by weighted average. Then PA1 / 2 is taken as the threshold, and the amplitude value PA2′ is re-weighted averaged. PA2′ is the estimated value of radar signal amplitude A. 3.3) When measuring the arrival time and pulse width, half of the maximum pulse amplitude is used as the time reference for judging the leading and trailing edges of the pulse based on the amplitude measurement. The time TOA1 of the leading edge of the pulse is used as the estimated value of the pulse arrival time, and the difference PW1′ between the trailing edge and the leading edge of the pulse is used as the estimated value of the pulse width.

9. The method for simulating a radio frequency simulation dynamic game against interference environment according to claim 7 is characterized in that: In step 4), the specific method for judging the working state of the radar according to the amplitude measurement result and the arrival time is as follows: 4.1) Assume that the amplitude measurement results of n pulses are PA2′(k), k=1,2,...n, and find the maximum value PA′ in the measurement results. max ; 4.2) PA′ max -0.5 is the threshold value. Find the arrival time sequence greater than the threshold in the arrival time sequence TOA2′(k), k=1,2,...n, and obtain the arrival time TOA2′(m), m=1,2,...M corresponding to the maximum amplitude; 4.3) With pulse repetition period T PRF is the clustering threshold, and the arrival time TOA2′(m), m=1,2,...M is clustered. If TOA2′(m+1)-TOA2′(m)≤T PRF , then retain TOA2′(m), remove TOA2′(m+1) from the sequence, and after traversing M arrival times, obtain the arrival time sequence TOA2′(n) that takes into account the antenna main lobe scanning process; 4.4) Radar antenna scanning period T scan TOA2′(n+1)-TOA2′(n); 4.5) If the antenna scanning period is T scan ≤100ms, the radar is judged to be in tracking state, and the tracking data rate is 1 / T scan , otherwise it is judged that the radar is in search state.

10. The method for simulating a radio frequency simulation dynamic game against interference environment according to claim 7 is characterized in that: In step 6), if the radar is in the search state, the current interference strategy is maintained unchanged, and the digital interference signal continues to be sent to the signal generation unit; if the radar is in the tracking state, the interference strategy is adjusted and optimized according to the dynamic game confrontation principle, and the regenerated digital interference signal is sent to the signal generation unit.

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