Dual-radar cooperative transmit-receive split simulation implementation method

Abstract

The invention belongs to the technical field of radar detection, and particularly relates to a dual-radar cooperative transmit-receive split simulation implementation method, which comprises the following steps of: 1, creating simulation radar models of a receiver, a transmitter and a target; 2, setting radar parameter values of a receiver and a transmitter in a radar equation; step 3, taking a dual-machine RCS value sigma B called from a database, a distance RT between a transmitter and a target, a distance RR between a receiver and the target, and a distance RL between the transmitter and the receiver as inputs, substituting the inputs into the radar equation for calculation, and obtaining a minimum detectable signal-to-noise ratio D; and 4, when the minimum detectable signal-to-noise ratio D is greater than a set threshold value, determining that the target is detectable, and otherwise, determining that the target is not detectable.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of radar detection, and particularly relates to a method for realizing simulation of cooperative transmitting-receiving separation of dual-radar. BACKGROUND

[0002] The current aircraft low detection technology mainly considers reducing the radar cross section (RCS) in the head direction of the nearby angle domain to improve the penetration capability of the low detection aircraft when advancing towards the attack target. For the detection of single-radar, the low detection of the aircraft shape mainly reflects most of the incident electromagnetic wave energy intercepted by the aircraft to the direction other than the receiving direction (for single-radar, it is the reverse direction of the irradiation direction), and only a small part of the reflected electromagnetic energy propagates along the receiving direction, so as to reduce the RCS in the main attitude angle range (near the head direction of the aircraft).

[0003] For the low detection aircraft, if dual (multi) radar is used, it is possible to capture a stronger radar echo in some directions, so as to achieve the need of anti-low detection. The multiple receiving radars are arranged away from the irradiation radar, and then a stronger scattering beam can be received.

[0004] In addition, due to the detection characteristics of the transmitting-receiving separation of the dual-radar, the main machine does not open the radar radiation, and the slave machine opens the radar radiation, so as to "confuse the line of sight" of the detection target, and then achieve the purpose of hiding the main machine. A simulation system is needed to detect the detection characteristics of the transmitting-receiving separation of the dual-radar. SUMMARY

[0005] In order to solve the above problems, the application provides a method for realizing simulation of cooperative transmitting-receiving separation of dual-radar, which comprises:

[0006] Step one: creating a simulation radar model of the receiver, transmitter and target;

[0007] Step two: setting the radar parameter values of the receiver and transmitter in the radar equation;

[0008] Step three: taking the dual-RCS value σ B , the distance R T between the transmitter and the target, the distance R R between the receiver and the target, and the distance R L between the transmitter and the receiver as inputs, substituting them into the radar equation to calculate the minimum detectable signal-to-noise ratio D;

[0009] Step four: when the minimum detectable signal-to-noise ratio D is greater than the set threshold value, the target can be detected, otherwise it cannot be detected.

[0010] Preferably, setting the radar parameter values of the receiver and transmitter comprises: setting the transmitter power P TThe gain G of the transmitting antenna T The gain G of the receiving antenna R The noise figure F of the receiver N The system loss L of the receiver

[0011] Preferably, the radar equation of the simulation radar model is:

[0012]

[0013] The constraint condition is:

[0014]

[0015] Wherein, λ is the wavelength of the radar, k is the Boltzmann constant, T0 is the standard temperature 290k, F N is the noise figure of the receiver.

[0016] Preferably, the dual-machine RCS value σ B The method for establishing the database comprises:

[0017] A spherical coordinate system with the target as the center is established, and the corresponding dual-machine RCS value σ T is obtained through simulation under different incident beam incident azimuth angles α T , incident elevation angles β R , reflected beam reflection azimuth angles α R , and reflected elevation angles β B The obtained dual-machine RCS value σ B is encapsulated into a database.

[0018] Preferably, the method for calling the dual-machine RCS value σ B from the database is that, according to the positional relationship among the receiver, the transmitter, and the target, the incident azimuth angle α T , the incident elevation angle β T , the reflected beam reflection azimuth angle α R , and the reflected elevation angle β R are calculated, and the current dual-machine RCS value σ B is called according to the formula σ T (α T , β R , α R , β B ).

[0019] Preferably, the simulation radar model is obtained by changing the target interception condition of the single-machine simulation radar model, and the target interception condition comprises a frequency domain interception condition, an energy domain interception condition, and a space domain interception condition.

[0020] Preferably, the frequency domain interception condition is updated, when the system operating frequency band covers the radar radiation signal operating frequency, it is determined that the radar radiation signal meets the interception condition, otherwise it does not meet the interception condition.

[0021] Preferably, the spatial domain interception condition is updated, the dual-radar detection spatial domain condition needs to meet the condition of being in the dual-radar detection range at the same time.

[0022] Preferably, the energy domain interception condition is updated, which is different from the calculation of the detection distance of a single station radar, and the influence of the propagation factor is ignored.

[0023] The advantages of the present application include: improving the detection capability of low-detection aircraft and reducing the risk of excessive proximity to the target aircraft and increasing the exposure of the aircraft. BRIEF DESCRIPTION OF DRAWINGS

[0024] Figure 1 The single-radar anti-low-detection and dual-radar anti-low-detection schematic diagram is shown in the figure.

[0025] Figure 2 The cooperative transceiver separation detection hidden master machine schematic diagram is shown in the figure.

[0026] Figure 3 The dual-radar transceiver separation simulation flowchart is shown in the figure. DETAILED DESCRIPTION

[0027] In order to make the technical solutions of the present application and its advantages clearer, the technical solutions of the present application will be further described in detail below in combination with the drawings. It should be understood that the specific embodiments described herein are only part of the embodiments of the present application, and are only used to explain the present application, but not to limit the present application. It should be noted that, for the convenience of description, only the parts related to the present application are shown in the drawings, and other related parts can be referred to the usual design. In the case of no conflict, the embodiments in the present application and the technical features in the embodiments can be combined to obtain new embodiments.

[0028] The present application provides a dual-radar cooperative transceiver separation simulation implementation method, as shown in the figure, which comprises: Figures 1-2

[0029] Step 1: Create a receiver, transmitter and target simulation radar model;

[0030] Step 2: Set the receiver and transmitter radar parameter values in the radar equation;

[0031] Step 3: Use the dual-RCS value σ B from the database, the distance R T between the transmitter and the target, the distance R R between the receiver and the target, and the distance R L ​The minimum detectable signal-to-noise ratio D is obtained by substituting the input into the radar equation.

[0032] Step 4: When the minimum detectable signal-to-noise ratio D is greater than the set threshold, the target is detectable; otherwise, it is not detectable.

[0033] Preferably, setting the receiver and transmitter radar parameter values ​​includes: setting the transmitter power P. T The gain G of the transmitting antenna T The gain G of the receiving antenna R Receiver noise figure F N The receiver's system loss L.

[0034] Preferably, the radar equations of the simulated radar model are:

[0035]

[0036] The constraints are:

[0037]

[0038] Where λ is the radar operating wavelength, k is the Boltzmann constant, T0 is the standard temperature of 290 K, and F N This represents the receiver noise figure.

[0039] Preferably, the dual-machine RCS value σ B Methods for creating a database include:

[0040] A spherical coordinate system with the target as the centroid is established, and the incident azimuth angle α of different incident beams is obtained through simulation. T Incident elevation angle β T , Reflection azimuth angle α of the reflected beam R Reflection pitch angle β R The corresponding dual-machine RCS value σ B The obtained dual-machine RCS value σ B Package it into a database.

[0041] Preferably, the dual-machine RCS value σ is retrieved from the database. B The method involves calculating the incident azimuth angle α based on the positional relationship between the receiver, transmitter, and target. T Incident elevation angle β T , Reflection azimuth angle α of the reflected beam R Reflection pitch angle β R According to the formula σ B =σ(α) T ,β T α R ,β R Call the current dual-machine RCS value σ B .

[0042] Preferably, the simulation radar model is obtained by modifying target interception conditions of a single-machine simulation radar model, the target interception conditions including frequency domain interception conditions, energy domain interception conditions, and space domain interception conditions.

[0043] Preferably, the frequency domain interception conditions are updated, and when a system operating frequency band covers a radar radiation signal operating frequency, it is determined that the radar radiation signal meets the interception conditions, otherwise, the interception conditions are not met.

[0044] Preferably, the space domain interception conditions are updated, and a double-machine radar detection space domain condition needs to be met at the same time in a double-machine radar detection range.

[0045] Preferably, the energy domain interception conditions are updated, and the calculation of a single-station radar detection distance is distinguished, and the influence of a propagation factor is ignored.

[0046] A simulation scene is simulated according to the simulation radar model, as shown in Figure 3

[0047] Step one: a typical double-machine radar cooperative transmitting-receiving separation simulation scene is created, and a master machine and a slave machine cooperatively detect an air target.

[0048] In the simulation system, the F1 machine and the F2 machine form a cooperative formation, the F1 machine closes the radar radiation, the F2 machine opens the radar radiation, and the transmitting-receiving separation cooperative detection task is issued to the formation through a simulation master control system.

[0049] Step two: after the formation receives the instruction, the cooperative transmitting-receiving separation detection mode is entered. Specifically, the F1 machine receives an external working mode entering instruction, enters a preparation state, and sends a state entering instruction to the F2 machine. After the F2 machine receives the state entering instruction, it reports to the F1 machine that it has entered the preparation state, and sends radar operating parameters, initialization parameters, and navigation information. After the above information, it automatically enters a confirmation state. After the F1 machine receives the above information reported by the transmitter, it enters the confirmation state. The F1 machine and the F2 machine each enter the confirmation state and report "has entered the transmitting-receiving separation area search" state information.

[0050] Step three: according to the target position information, the F2 machine navigation information, and the F2 machine inertial navigation data, a transmitting wave position table is calculated and generated, and the double machines synchronously scan according to the transmitting wave position table and a receiving wave position table; a double-machine RCS value library is called to obtain a current parameter σ B value, and the corresponding distance and the current parameter σ B value are input into the radar to execute double-machine target interception judgment, that is, minimum detectable signal-to-noise ratio D judgment. When the interception conditions are met, target detection information is output, otherwise, task failure is reported.

[0051] ​The above merely provides the specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of the changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A method for implementing bistatic radar cooperative transceiver separation simulation, characterized in that, The application relates to a method for simulating radar detection of a target. Step one: creating a simulation radar model of a receiver, a transmitter and the target; Step two: setting the receiver and transmitter radar parameter values in the radar equation; Step three: input the two-ship RCS value σ retrieved from the database B , the distance R between the transmitter and the target T , the distance R between the receiver and the target R , the distance R between the transmitter and the receiver L , and calculate the minimum detectable signal-to-noise ratio D in the radar equation Step four: when the minimum detectable signal-to-noise ratio D is greater than a set threshold, the target can be detected, otherwise the target cannot be detected.

2. The bistatic radar cooperative transceiver-dispersion simulation implementation method according to claim 1, characterized in that, Setting the values of the receiver, transmitter radar parameters includes setting the transmitter power P T , the gain of the transmitting antenna G T , the gain of the receiving antenna G R ; the receiver noise figure F N , the system losses L of the receiver.

3. The bistatic radar cooperative transceiver-dispersion simulation implementation method according to claim 2, characterized in that, The radar equation of the simulation radar model is as follows: The constraint condition is as follows: where λ is the radar operating wavelength, k is the Boltzmann constant, T0is the standard temperature 290 k, F N is the receiver noise figure.

4. The bistatic radar cooperative transceiver-dispersion simulation implementation method according to claim 1, characterized in that, RCS value σ of two machines B The database establishment method comprises: A spherical coordinate system with the target as the centroid is established, and the incident azimuth angle α of different incident beams is obtained through simulation. T Incident elevation angle β T , Reflection azimuth angle α of the reflected beam R Reflection pitch angle β R The corresponding dual-machine RCS value σ B The obtained dual-machine RCS value σ B Package it into a database.

5. The bistatic radar cooperative transceiver-dispersion simulation implementation method according to claim 1, characterized in that, Method for retrieving dual RCS value σ from database B is to calculate incident azimuth angle α T , incident elevation angle β T , reflected beam azimuth angle α R , reflected elevation angle β R according to the position relationship of receiver, transmitter and target, and to call current dual RCS value σ B according to formula σ T (α T , β R , α R , β B ).

6. The bistatic radar cooperative transceiver-dispersion simulation implementation method according to claim 1, characterized in that, The simulation radar model is obtained by changing a target interception condition of a single-machine simulation radar model, and the target interception condition comprises a frequency domain interception condition, an energy domain interception condition and a space domain interception condition.

7. The bistatic radar cooperative transceiver-dispersion simulation implementation method according to claim 6, characterized in that, The frequency domain interception condition is updated, when a system working frequency band covers a radar radiation signal working frequency, it is determined that the radar radiation signal satisfies the interception condition, otherwise the radar radiation signal does not satisfy the interception condition.

8. The bistatic radar cooperative transceiver-dispersion simulation implementation method according to claim 6, characterized in that, The space domain interception condition is updated, and a double-machine radar detection space domain condition needs to satisfy a condition of being simultaneously in a double-machine radar detection range.

9. The bistatic radar cooperative transceiver-dispersion simulation implementation method according to claim 6, characterized in that, The energy domain interception condition is updated, and the calculation of a single-station radar detection distance is distinguished, and the influence of a propagation factor is ignored.

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