Single-channel multi-angle target simulation method and system

Abstract

The invention discloses a single-channel multi-angle target simulation method and system. The method comprises the steps of generating a pulse parameter table, obtaining a triple to which electromagnetic target signals of radars at different angular positions belong in a radio frequency array, determining amplitude differences and phase differences on three branches corresponding to the triple, and generating a triple amplitude-phase deviation table; according to the three antenna numbers of the triple to which the current radar pulse signal belongs, control words corresponding to the three antenna numbers are obtained, and the control words are sent to the control numerical control switch group, so that the three branch signals can be respectively sent to the three branch antennas of the corresponding triple, and the switching of the triple is realized; a triple corresponding to the radio frequency array radiates a current radar pulse signal, and signals of the three branches are finally synthesized into an electromagnetic target signal at an angular position. Under the condition of not increasing simulator hardware equipment, the target simulation number is expanded, the simulation fidelity of the complex electromagnetic environment is improved, and the system complexity and the hardware cost are reduced.

Description

Technical Field

[0001] This application relates to the field of microwave radio frequency technology, and particularly to a single-channel multi-angle target simulation method and system. Background Art

[0002] With the development of electronic devices and radio frequency simulation technology, there is an increasing demand for simulation tests in a microwave anechoic chamber under complex electromagnetic environments. Simulating a complex electromagnetic environment requires generating a relatively large number of signals. And to realistically simulate the actual electromagnetic environment, the simulated signals should be distributed in different azimuths of the signal receiving device. In a microwave anechoic chamber, different azimuth electromagnetic target signals are simulated through signal simulator devices and radio frequency array antennas. Generally, one simulator channel can simulate one electromagnetic target signal. If a relatively large number of electromagnetic signals need to be simulated, a corresponding number of simulator devices are required, and the increase in simulator devices will bring a significant increase in system complexity and hardware cost. If it is desired to simulate a large number of electromagnetic target signals on the premise of a limited number of simulator devices, then a single signal simulator channel needs to generate multiple radio frequency signals and simultaneously emit them from different angular positions of the radio frequency antenna array.

[0003] CN118054804A, "A Portable L-Band Multi-Signal Simulation Source and Generation Method", discloses a multi-signal simulation source and generation method, which combines the characteristics of single-simulator time-sharing simulation and multi-simulator distributed simulation. However, this method does not solve the problem of simulating electromagnetic signals at multiple positions in a radio frequency simulation microwave anechoic chamber using a single-channel simulator. Additionally, CN103760539A, "Radar Multi-Target Echo Simulation System and Method", can output electromagnetic target signals with multiple delays by introducing a counter, thereby simulating multiple radar echo targets. But this method does not explain how to simulate electromagnetic signals at multiple positions in a radio frequency simulation microwave anechoic chamber using a single-channel simulator. In the application of the above multi-target simulator devices in microwave anechoic chamber radio frequency simulation, only multiple electromagnetic target signals can be generated in the radial direction of the signal receiving device, and it is impossible to realistically simulate the real electromagnetic environment. If it is necessary to simulate electromagnetic signals at multiple angular positions, the number of simulator channels needs to be increased, which will bring a significant increase in system size and cost. Summary of the Invention

[0004] In view of this, this application provides a single-channel multi-angle target simulation method and system, which, for a microwave anechoic chamber based on a radio frequency antenna array, realizes that one signal simulator channel can simultaneously simulate electromagnetic target signals at multiple different azimuths, thereby expanding the number of target simulations and improving the realism of complex electromagnetic environment simulation without increasing simulator hardware devices.

[0005] This application discloses a single-channel multi-angle target simulation method, which includes: The generation unit combines the pulse information of radars at different angular positions, generates a pulse parameter table and sends it to the target signal simulator; The generation unit obtains the triplet of electromagnetic target signals of radars at different angular positions in the radio frequency array based on the radar angular position information, determines the amplitude difference and phase difference on the three branches corresponding to the triplet, generates a triplet amplitude-phase deviation table, and sends it to the array control unit; the triplet amplitude-phase deviation table records the antenna numbers, amplitude differences, and phase differences of the three different branches; The target signal simulator generates a video pulse according to the pulse parameter table, generates a radar pulse signal according to the video pulse, and sends the video pulse and the corresponding radar pulse signal to the array control unit; The array control unit learns the moment when the angular position of the radar pulse signal changes based on the video pulse, obtains the triplet antenna number to which the radar pulse signal belongs at that moment, as well as the amplitude difference and phase difference on the three branches from the triplet amplitude and phase deviation table when the angular position changes, corrects the amplitude based on the phase difference, and then obtains the final amplitude of the three branches based on the amplitude difference; obtains the amplitude control word and phase control word corresponding to the final amplitude and phase difference to control the amplitude difference and phase difference of the three branches of the array control unit; According to the three antenna numbers of the triplet to which the current radar pulse signal belongs, the control words corresponding to the three antenna numbers are obtained and sent to the control digital control switch group, so that the three branch signals can be sent to the three branch antennas of the corresponding triplet respectively, thereby realizing the switching of the triplet; The triplet corresponding to the RF array radiates the current radar pulse signal, and the signals of the three branches are finally synthesized into the electromagnetic target signal of the angular position.

[0006] Furthermore, the angular position refers to the angle between the position of the electromagnetic target signal detected at the turntable and the direction directly in front of the turntable. After determining the triplet, the angular position of the electromagnetic target signal is expressed by the angular scintillation equation; the RF array is placed above the turntable.

[0007] Furthermore, the angular scintillation equation is used to accurately describe the position of the electromagnetic target signal angular position within the equilateral triangle corresponding to the triplet. The angular scintillation equation is expressed as:

[0008]

[0009] The premise for the angular scintillation equation to be valid is that the phases of the three antennas in the triplet are consistent. The phase difference between the three antennas in different triplet groups can be measured in advance through the phase shifter in the array control unit. in, 、 、 are the azimuth coordinates of the three antennas in the triplet, , , are the elevation angle coordinates of the three antennas of the triple, is the azimuth angle of the electromagnetic target signal, is the elevation angle of the electromagnetic target signal, , , are the radiation signal amplitudes of the three antennas, which can be controlled by the amplitude attenuator in the array control unit; If the azimuth angle and elevation angle of the electromagnetic target signal are known, the radiation amplitudes of the target at the three antennas of the triple can be obtained. By controlling the radiation amplitudes, the position of the target in the triple can be accurately controlled.

[0010] Furthermore, the azimuth angle refers to the horizontal component of the angle between the position where the electromagnetic target signal is detected at the turntable and the front direction of the turntable; the elevation angle refers to the vertical component of the angle between the position where the electromagnetic target signal is detected at the turntable and the front direction of the turntable.

[0011] Furthermore, the radar pulse signal has different angular positions at different times. At different angular positions, it is radiated by the corresponding three branches with corresponding amplitude deviations and phase deviations. The change order of the angular positions of the radar pulse signal is consistent with the change order of the angular positions in the amplitude-phase deviation table of the triple.

[0012] Furthermore, the video pulse indicates when the angular position of the radar pulse signal changes.

[0013] Furthermore, in the array control unit, the input radar pulse signal is divided into three paths by a power divider; the amplitude differences and phase differences of the corresponding three branches are controlled by three groups of amplitude attenuators and phase shifters; the signals of the three branches are distributed to the three antennas of the triple according to the antenna numbers by a digital control switch group.

[0014] Furthermore, when the generating unit combines the pulse information of the radar at different angular positions, the pulse periods of the radar at different angular positions are the same, and the radial distances of the radar at different angular positions are different enough so that the signals of each radar can be separated in the time domain; In the generated pulse parameter table, the pulse width is the pulse width of each electromagnetic target signal, and the pulse period can be calculated according to the radial distance difference between two adjacent position radars.

[0015] Furthermore, the triple refers to three adjacent antennas arranged at the intersection points of an equilateral triangle grid in the RF array. The three branch signals with different radiation amplitudes and phases of the three antennas are combined into an electromagnetic target signal at a specified angular position.

[0016] The present application also discloses a single-channel multi-angle target simulation system to implement the above-mentioned single-channel multi-angle target simulation method, which includes a generation unit, a target simulator, an array control unit and a radio frequency array; the generation unit stores real-time software; the array control unit is connected to the generation unit, the target simulator and the radio frequency array respectively; the array control unit includes a power divider, an amplitude attenuator, a phase shifter and a digital control switch group connected in sequence; the target simulator is connected to the power divider; the digital control switch group includes multiple switches, and the switches and phase shifters are connected one-to-one; each switch is connected to the corresponding antenna in the radio frequency array through the antenna number.

[0017] Due to the adoption of the above-mentioned technical solution, the present application has the following advantages: for a microwave darkroom based on a radio frequency antenna array, a signal simulator channel is implemented to simultaneously simulate multiple (up to 8) electromagnetic target signals in different directions, thereby expanding the number of target simulations without increasing the simulator hardware equipment, improving the electromagnetic environment simulation capability, improving the realism of complex electromagnetic environment simulation, and reducing system complexity and hardware costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments recorded in the embodiments of the present application. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0019] Figure 1 A schematic flow chart of a single-channel multi-angle target simulation method according to an embodiment of the present application; Figure 2 This is a block diagram of a single-channel multi-angle target simulation system according to an embodiment of the present application; Figure 3 A schematic diagram showing the relationship between the three antennas of the triplet according to an embodiment of the present application; Figure 4 This is a schematic diagram of the control flow of the array control unit according to an embodiment of the present application; Figure 5 This is a schematic diagram of single-channel multi-angle target signal reception according to an embodiment of the present application. DETAILED DESCRIPTION

[0020] The present application is further described with reference to the accompanying drawings and embodiments. The embodiments described are only a part of the embodiments of the present application, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field should fall within the scope of protection of the embodiments of the present application.

[0021] See also Figure 1 , the present application provides an embodiment of a single-channel multi-angle target simulation method, which includes: The generating unit combines the pulse information of radars at different angular positions, generates a pulse parameter table and sends it to the target signal simulator; The generating unit obtains the triplets to which the electromagnetic target signals of radars at different angular positions belong in the RF array according to the radar angular position information, and simultaneously determines the amplitude differences and phase differences on the three branches corresponding to the triplets, generates a triplet amplitude-phase deviation table and sends it to the array control unit; the triplet amplitude-phase deviation table records the antenna numbers, amplitude differences, and phase differences of the three different branches; specifically, according to the pre-calibrated angular positions, as well as the triplet antenna numbers, triplet branch signal amplitude deviations, and triplet branch signal phase deviations corresponding to the angular positions, the triplets to which the electromagnetic target signals of radars at different angular positions belong in the RF array can be calculated, the amplitudes and phase differences on branches A, B, and C in the triplets are determined, and a triplet amplitude-phase deviation table is generated.

[0022] The target signal simulator generates video pulses according to the pulse parameter table, then generates radar pulse signals according to the video pulses, and sends the video pulses and the corresponding radar pulse signals to the array control unit; The array control unit obtains the moment when the angular position of the radar pulse signal changes according to the video pulse. When the angular position changes, it obtains the triplet antenna number to which the radar pulse signal belongs at this moment and the amplitude differences and phase differences on the three branches from the triplet amplitude-phase deviation table, corrects the amplitude according to the phase difference, and then obtains the final amplitudes of the three branches according to the amplitude differences; obtains the amplitude control words and phase control words corresponding to the final amplitudes and phase differences to control the amplitude differences and phase differences of the three branches of the array control unit; According to the three antenna numbers of the triplet to which the current radar pulse signal belongs, obtain the control words corresponding to the three antenna numbers, and send the control words to the control digital switch group, then the signals of the three branches can be sent to the three branch antennas of the corresponding triplet respectively to realize the switching of the triplet; The triplet corresponding to the RF array radiates the current radar pulse signal, and the signals of the three branches are finally synthesized into an electromagnetic target signal at the angular position.

[0023] On the basis of the above embodiments, as time changes, the target signal simulator generates changing video pulses and radar pulse signals, the array control unit reads different data in the triplet amplitude-phase deviation table according to the video pulses, generates changing amplitude and phase control words, and finally synthesizes an electromagnetic target signal with changing angular positions to realize single-channel multi-angle target simulation.

[0024] Optionally, according to the control of the array control unit, the RF array radiates the three branch signals modulated by the amplitude differences and phase differences from the corresponding antennas into the anechoic chamber.

[0025] Optionally, the angular position refers to the angle between the position where the electromagnetic target signal is detected at the turntable and the forward direction of the turntable. After determining the triple, the angular position of the electromagnetic target signal is represented using the angular glint equation; the RF array is placed above the turntable.

[0026] Optionally, the angular glint equation is used to accurately describe the position of the angular position of the electromagnetic target signal within the equilateral triangle corresponding to the triple, and the angular glint equation is expressed as:

[0027]

[0028] The prerequisite for the angular glint equation to hold is that the phases of the three antennas in the triple are consistent, which can be controlled by the phase shifters in the array control unit, and the phase differences of the three antennas in different triples are measured in advance; Among them, 、 、 are the azimuth angle coordinates of the three antennas in the triple, 、 、 are the elevation angle coordinates of the three antennas in the triple, is the azimuth angle of the electromagnetic target signal, is the elevation angle of the electromagnetic target signal, 、 、 are the radiation signal amplitudes of the three antennas, which can be controlled by the amplitude attenuators in the array control unit; as Figure 3 shown; If the azimuth angle and elevation angle of the electromagnetic target signal are known, the radiation amplitudes of the target at the three antennas in the triple can be obtained, and by controlling the radiation amplitudes, the position of the target in the triple can be accurately controlled.

[0029] Optionally, the azimuth angle refers to the horizontal component of the angle between the position where the electromagnetic target signal is detected at the turntable and the forward direction of the turntable; the elevation angle refers to the vertical component of the angle between the position where the electromagnetic target signal is detected at the turntable and the forward direction of the turntable.

[0030] Optionally, the radar pulse signal has different angular positions at different times. At different angular positions, it is radiated by the corresponding three branches with corresponding amplitude deviations and phase deviations, and the change order of the angular position of the radar pulse signal is consistent with the change order of the angular position in the amplitude-phase deviation table of the triple.

[0031] Optionally, the video pulse indicates when the angular position of the radar pulse signal changes.

[0032] Optionally, in the array control unit, a power splitter is used to divide the input radar pulse signal into three paths; three groups of amplitude attenuators and phase shifters are used to control the amplitude difference and phase difference of the corresponding three branches; a digital control switch group is used to distribute the signals of the three branches to the three antennas of the triple according to the antenna number.

[0033] Optionally, when the generating unit combines the pulse information of the radars at different angular positions, the pulse periods of the radars at different angular positions are consistent, and the radial distances of the radars at different angular positions differ sufficiently so that the signals of each radar can be separated in the time domain; In the generated pulse parameter table, the pulse width is the pulse width of each electromagnetic target signal, and the pulse period can be calculated according to the radial distance difference between two adjacent-position radars. Specifically, the calculation formula is , where is the pulse period, is the radial distance difference between two adjacent-position radars (unit: m), and c is the speed of light (unit: m / s). For simplicity of calculation, the speed of light can be taken as 300000000 m / s, so each 1 us in the table corresponds to a 300 m interval. The pulse parameter table is shown in Table 1.

[0034] Optionally, the triple refers to three adjacent antennas whose radio frequency arrays are arranged at the intersections of an equilateral triangle grid. The three antennas radiate three branch signals with different amplitudes and phases, and synthesize an electromagnetic target signal at a specified angular position.

[0035] See Figure 2 , this application also provides an embodiment of a single-channel multi-angle target simulation system to implement the single-channel multi-angle target simulation method described in the above embodiment. It includes a generating unit, a target simulator, an array control unit, and a radio frequency array; the generating unit stores real-time software; the array control unit is respectively connected to the generating unit, the target simulator, and the radio frequency array; the array control unit includes a power splitter, an amplitude attenuator, a phase shifter, and a digital control switch group connected in sequence; the target simulator is connected to the power splitter; the digital control switch group includes multiple switches, and the switches are connected to the phase shifters one by one; each switch is connected to the corresponding antenna in the radio frequency array through the antenna number.

[0036] For easy understanding, this application gives a more specific embodiment: Step 1, the generating unit combines the pulse information of the radars at different angular positions. The pulse periods of the radars at different angular positions are consistent, and the radial distances of the radars at different angular positions differ sufficiently so that the signals of each radar can be separated in the time domain.

[0037] Specifically, as shown in Table 1, in a generated set of pulse parameter tables, the pulse width is the pulse width of each electromagnetic target signal, and the pulse period is calculated according to the radial distance difference between two adjacent-position radars. The calculation formula is , where is the pulse period, is the radial distance difference between two adjacent position radars (unit: m), and c is the speed of light (unit: m / s).

[0038] Table 1 Example of pulse parameter representation

[0039] For simplicity of calculation, the speed of light can be taken as 300000000 m / s. Then, each 1 us in the table corresponds to a 300 m interval.

[0040] Step 2: The generation unit calculates the triplets to which the electromagnetic target signals at different angular positions belong in the RF array, as well as the amplitude and phase differences on the A, B, and C branches (three branches) in the triplets, based on the angular position amplitude and phase parameters calibrated in advance, and generates a triplet amplitude-phase deviation table, as shown in Table 2.

[0041] Table 2 Example of triplet amplitude-phase deviation

[0042] Specifically, the triplet amplitude-phase deviation table records the triplet numbers to which each electromagnetic target signal belongs, as well as the amplitude differences and phase differences of the A, B, and C branches respectively.

[0043] Step 3: Send the triplet amplitude-phase deviation table to the array control unit.

[0044] Step 4: Send the pulse parameter table to the target signal simulator.

[0045] Step 5: The target signal simulator generates video pulses according to the pulse parameter table and transmits them to the array control unit.

[0046] Step 6: The target signal simulator generates a string of radar pulse signals based on the video pulses generated according to the pulse parameter table and sends them to the array control unit.

[0047] Step 7: Refer to Figure 4 , the array control unit obtains the triplet to which the current radar pulse signal belongs from the triplet amplitude-phase deviation table according to the video pulses, looks up the respective amplitude differences and phase differences according to the triplet and the antenna numbers of the A, B, and C branches. Different phase differences will have a slight impact on the amplitude. Correct the amplitude according to the phase difference, and finally generate the amplitude and phase control words.

[0048] Specifically, a power divider is used in the array control unit to divide the input signal into three paths; according to the amplitude and phase difference of the current radar pulse signals on branches A, B, and C, referring to the manuals of the amplitude attenuator and the phase shifter, the amplitude and phase control words corresponding to different amplitudes and phase differences can be obtained. Sending the amplitude and phase control words to the three groups of amplitude attenuators and phase shifters on branches A, B, and C respectively can control the amplitude and phase difference on branches A, B, and C; according to the three antenna numbers of the triple corresponding to the current radar pulse signal, referring to the manual of the digital control switch group, the control words corresponding to different antenna numbers can be obtained. Sending the control words to the digital control switch group can send the signals on branches A, B, and C to the antennas on branches A, B, and C of the corresponding triple respectively, thus realizing the switching of the triple.

[0049] Step 8, the specific triple of the radio frequency array radiates the current radar pulse signal, and the signals on the three branches A, B, and C are finally synthesized into an electromagnetic target signal at a specific angular position. As Figure 5 shown, since the radial distances and angular positions of the electromagnetic target signals are different, their amplitudes are different, so they can be easily distinguished by an oscilloscope.

[0050] Step 9, as time changes, the target signal simulator generates changing video pulses and radar pulse signals. The array control unit reads different data in the triple amplitude-phase deviation table according to the video pulses, generates changing amplitude and phase control words, and finally synthesizes an electromagnetic target signal with a changing angular position, realizing single-channel multi-angle target simulation.

[0051] It should be noted that in various embodiments of the present application, the magnitudes of the serial numbers of the above processes do not mean the order of execution. The order of execution of each process should be determined by its function and internal logic, and should not constitute any limitation to the implementation process of the embodiments of the present application.

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and not to limit them. Although the present application has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the specific implementation manners of the present application can still be modified or equivalently replaced, and any modification or equivalent replacement that does not depart from the spirit and scope of the present application should be covered within the protection scope of the claims of the present application.

Claims

1. A single-channel multi-angle target simulation method, characterized in that, Including: A generating unit combines the pulse information of radars at different angular positions, generates a pulse parameter table and sends it to a target signal simulator; The pulse parameter table includes a pulse period and a pulse width; The generating unit obtains the triplets to which the electromagnetic target signals of radars at different angular positions belong in a radio frequency array according to the radar angular position information, and simultaneously determines the amplitude differences and phase differences on three branches corresponding to the triplets, generates a triplet amplitude-phase deviation table and sends it to an array control unit; the triplet amplitude-phase deviation table records the antenna numbers, amplitude differences, and phase differences of three different branches; The target signal simulator generates video pulses according to the pulse parameter table, then generates radar pulse signals according to the video pulses, and sends the video pulses and corresponding radar pulse signals to the array control unit; The array control unit obtains the moment when the angular position of the radar pulse signal changes according to the video pulse, and when the angular position changes, obtains the triplet antenna numbers to which the radar pulse signal belongs at this moment and the amplitude differences and phase differences on three branches from the triplet amplitude-phase deviation table, corrects the amplitude according to the phase difference, and then obtains the final amplitudes of three branches according to the amplitude differences; obtains the amplitude control words and phase control words corresponding to the final amplitudes and phase differences to control the amplitude differences and phase differences of three branches of the array control unit; According to the three antenna numbers of the triplet to which the current radar pulse signal belongs, obtains the control words corresponding to the three antenna numbers, and sends the control words to a control digital control switch group, so as to send the signals of three branches to the three branch antennas corresponding to the triplet respectively, and realize the switching of the triplet; The triplets corresponding to the radio frequency array radiate the current radar pulse signal, and the signals of three branches are finally synthesized into an electromagnetic target signal at the angular position.

2. The single-channel multi-angle target simulation method according to claim 1, wherein The angular position refers to the included angle between the position where the detected electromagnetic target signal is located at the turntable and the forward direction of the turntable. After determining the triplet, the angular position of the electromagnetic target signal is represented by an angle scintillation equation; the radio frequency array is placed in front of the turntable.

3. The single-channel multi-angle target simulation method according to claim 2, wherein The angle scintillation equation is used to accurately describe the position of the angular position of the electromagnetic target signal within the equilateral triangle corresponding to the triplet. The prerequisite for the angle scintillation equation to hold is that the phases of three antennas of the triplet are consistent, which can be controlled by a phase shifter in the array control unit, and the phase differences of three antennas in different triplets are measured in advance; If the azimuth angle and elevation angle of the electromagnetic target signal are known, the radiation amplitudes of the target on three antennas of the triplet can be obtained, and by controlling the radiation amplitudes, the position of the target in the triplet can be accurately controlled.

4. The single-channel multi-angle target simulation method according to claim 3, wherein, The azimuth angle refers to the horizontal component of the included angle between the position where the detected electromagnetic target signal is located at the turntable and the forward direction of the turntable; the elevation angle refers to the vertical component of the included angle between the position where the detected electromagnetic target signal is located at the turntable and the forward direction of the turntable.

5. The single-channel multi-angle target simulation method according to claim 1, wherein The radar pulse signal has different angular positions at different moments. At different angular positions, it is radiated by corresponding three branches with corresponding amplitude deviations and phase deviations. The change order of the angular position of the radar pulse signal is consistent with the change order of the angular position in the triplet amplitude-phase deviation table.

6. The single-channel multi-angle target simulation method according to claim 1, characterized in that The video pulse indicates when the angular position of the radar pulse signal changes.

7. The single-channel multi-angle target simulation method according to claim 1, characterized in that In the array control unit, a power divider is used to divide the input radar pulse signal into three paths; an amplitude attenuator and a phase shifter are used to control the amplitude difference and phase difference of the corresponding three branches; a digital control switch group distributes the signals of the three branches to the three antennas of the triple according to the antenna number.

8. The single-channel multi-angle target simulation method according to claim 1, wherein When the generating unit combines the pulse information of the radars at different angular positions, the pulse periods of the radars at different angular positions are consistent, and the radial distances of the radars at different angular positions are different enough so that the signals of each radar can be separated in the time domain. The pulse width in the pulse parameter table is the pulse width of each electromagnetic target signal, and the pulse period can be calculated according to the radial distance difference between two adjacent position radars.

9. The single-channel multi-angle target simulation method according to claim 1, characterized in that The triple refers to three adjacent antennas whose radio frequency arrays are arranged at the intersections of the equilateral triangle grid. The signals of the three branches with different radiation amplitudes and phases of the three antennas are combined into an electromagnetic target signal located at a specified angular position.

10. A single-channel multi-angle target simulation system for implementing the single-channel multi-angle target simulation method according to any one of claims 1-9, characterized in that, It includes a generating unit, a target simulator, an array control unit and a radio frequency array. The generating unit stores real-time software; the array control unit is respectively connected to the generating unit, the target simulator and the radio frequency array; the array control unit includes a power divider, an amplitude attenuator, a phase shifter and a digital control switch group connected in sequence; the target simulator is connected to the power divider; the digital control switch group includes a plurality of switches, and the switches are connected to the phase shifters one by one; each switch is connected to the corresponding antenna in the radio frequency array through the antenna number.

Images