A mobile phased array antenna pattern testing system and method

Abstract

A mobile phased array antenna pattern test system and method, belonging to the field of pattern test, solves the problem that antenna pattern test technology is too limited by the environment; comprises a beam synthesis terminal, a signal processing terminal, a signal distribution terminal, a calibration satellite, an inertial navigation, and a test computer; a beam to be tested and a tracking beam are generated by the beam synthesis terminal; during the maneuvering process of the phased array, the tracking beam and the beam to be tested receive the signal sent by the calibration satellite in real time, and transmit it to the signal processing terminal through the signal distribution terminal; the signal processing terminal receives the beam data and demodulates it, performs sum and difference beam angle measurement, calculates the C / N0 of the current position, and sends the angle measurement result and C / N0 to the test computer; the inertial navigation sends the measured phased array system attitude and position information to the test computer at fixed time intervals in real time; the present invention does not rely on a specific indoor environment and complex test equipment, and conveniently, flexibly, quickly and at low cost carries out pattern test in a mobile scene.

Description

Technical Field

[0001] The present invention belongs to the field of pattern testing, and relates to a mobile phased array antenna pattern testing system and method. Background Art

[0002] Compared with traditional reflector antennas, phased array antennas have the advantages of fast scanning speed, flexible beam pointing, etc., and are being gradually promoted and widely applied in many fields. As a very important parameter of antenna performance indicators, the antenna pattern has always been the focus of phased array antenna testing. Traditional antenna pattern testing generally needs to be carried out with the help of an anechoic chamber or a calibration tower, with low flexibility and large site limitations. For a mobile phased array antenna system deployed in the field, it is necessary to obtain the actual performance of the antenna in a timely manner. Especially for a large vehicle-mounted phased array system, the number of available large anechoic chambers is extremely small. At the same time, with the development of phased array technology, the number of beams that the antenna system can form is gradually increasing. Relying on manual serial testing of each antenna beam one by one not only affects the normal execution of tasks but also reduces the efficiency of antenna testing. Therefore, there is an urgent need for an antenna pattern testing system that can adapt to multi-beam parallel operation, has flexible testing, does not depend on the testing environment, and can operate maneuverably.

[0003] The patent application document with the publication number CN 116643095 A discloses a phased array antenna pattern testing system and method, including a radio frequency subsystem, a synchronous control subsystem, and a data processing subsystem. Before testing, the beam control codes to be tested are stored in the instruction storage and forwarder. During testing, the synchronous control subsystem sends the beam control codes to the radio frequency subsystem according to the angle synchronous pulse signal, so that the radio frequency subsystem generates radio frequency signals corresponding to the beams. Then, the synchronous control subsystem sends a sampling trigger pulse signal to the radio frequency subsystem to sample the radio frequency signals to obtain the amplitude and phase of the radio frequency signals, and sends them to the data processing subsystem. Finally, the data processing subsystem generates the corresponding angular domain pattern to complete the pattern testing of all profiles to be tested. The method can efficiently and accurately complete the sweep frequency and code scanning testing of the phased array antenna pattern by using the angle synchronous pulse signal to generate the corresponding radio frequency signals and complete the scanning and acquisition of the radio frequency signals. However, in fact, the method can only test the pattern of the antenna in the horizontal direction and does not discuss much in the vertical direction. Therefore, the phased array antenna still needs to perform roll and pitch movements through the common beam scanning or three-dimensional turntable in the field to achieve the corresponding technical effects. Moreover, the method belongs to the far-field method for pattern testing, and the phased array antenna to be tested has no high-speed displacement, and the testing environment cannot be separated from the anechoic chamber environment. That is, the method cannot complete the pattern testing during high-speed movement and is restricted by the environment. Summary of the Invention

[0004] The technical problem to be solved by the present invention is that the existing antenna pattern testing technology is too limited by the environment.

[0005] The present invention solves the above technical problem through the following technical solutions:

[0006] A mobile phased array antenna pattern testing system includes a beam signal acquisition and processing system, a calibration satellite, an inertial navigation system, and a test computer. The beam signal acquisition and processing system includes a beam synthesis terminal, a signal processing terminal, and a signal distribution terminal. The synthesized beam of the beam synthesis terminal establishes a connection with the calibration satellite. At the same time, the output end of the beam synthesis terminal is connected to the input end of the signal distribution terminal, the output end of the signal distribution terminal is connected to the input end of the signal processing terminal, the output end of the signal processing terminal is connected to one of the input ends of the test computer, and the other input end of the test computer is connected to the inertial navigation system.

[0007] The present invention tests the external field antenna pattern of a mobile, especially vehicle-mounted phased array system during actual use. This system uses a calibration satellite and does not rely on a specific anechoic chamber environment and complex test equipment. It can conveniently, flexibly, quickly, and at low cost carry out pattern testing in a mobile scenario without affecting the task execution of other antenna beams.

[0008] Preferably, the test computer includes a human-computer interaction software and a microservice set. The human-computer interaction software is used for testers to execute the test process and display the final antenna pattern test results. The microservice set includes: a parameter configuration microservice, an orbit prediction microservice, a platform attitude angle and position prediction microservice, an angle measurement filtering microservice, an antenna pointing angle calculation microservice, an amplitude processing microservice, a signal transmission and distribution microservice, and an antenna pattern automatic testing microservice.

[0009] A mobile phased array antenna pattern testing method includes the following steps:

[0010] Step 1: The tester executes a signal transmission and distribution microservice response request through the human-computer interaction interface, sends the exchange node address to be configured to the signal distribution terminal, and returns the operation result to the human-computer interaction interface.

[0011] Step 2: The tester executes signal processing and beam synthesis parameter configuration through the human-computer interaction interface and returns the operation result to the human-computer interaction interface.

[0012] Step 3: The tester executes a direction Figure 1 key test through the human-computer interaction interface. The signal processing terminal receives the beam data of the tracking beam, demodulates it, performs sum and difference angle measurement, and sends the angle measurement observation value to the test computer.

[0013] Step 4: The attitude angle and position prediction microservice of the antenna pattern automated test microservice call platform predicts the attitude angle and position information of the phased array system in the next cycle;

[0014] Step 5: The orbit prediction microservice receives the instantaneous orbit parameters of the calibration satellite. The antenna pattern automated test microservice calls the orbit prediction microservice and combines the position information of the phased array system predicted in Step 4 to calculate the azimuth angle and elevation angle of the calibration satellite in the northeast celestial coordinate system in the next cycle;

[0015] Step 6: The antenna pattern automated test microservice at calls the angle measurement filtering microservice to filter and predict the angle measurement observations at the moment;

[0016] Step 7: The antenna pattern automated test microservice calls the beam pointing angle calculation microservice to perform weighted processing on the predicted angle output by filtering and the predicted angle calculated from the instantaneous orbit parameters, and converts it into the azimuth angle and elevation angle in the array coordinate system, and sends the angle to the beam synthesis terminal;

[0017] Step 8: In the first cycle, the tracking beam and the beam to be measured point to the calibration satellite according to the predicted angle. The signal processing terminal receives the beam data, calculates the C / N0 at this position and sends it to the test computer to record this value. The test computer sends the beam synthesis terminal according to the calculated beam pointing angle in the subsequent cycle. The tracking beam stably points to the calibration beam satellite, and the beam to be measured is offset by a certain angle for pointing in each cycle;

[0018] Step 9: The antenna pattern automated test microservice calls the amplitude processing microservice to interpolate the C / N0 values corresponding to the azimuth angle or elevation angle at two adjacent moments, and sends the interpolation result to the test computer;

[0019] Step 10: The human-computer interaction software of the test computer displays the C / N0 at different azimuth angles and elevation angles in a three-dimensional graph on the human-computer interaction interface.

[0020] Preferably, the specific prediction method in Step 4 is:

[0021] The inertial navigation installed on the phased array system sends the attitude angle information and the position information to the test computer at the moment. is the yaw angle, is the pitch angle, is the roll angle, is the longitude, is the longitude, is the longitude, is the elevation; taking the yaw angle as an example, the test computer caches the historical data sequence , corresponding to Yaw angle observation data at a moment; let represent the function of the yaw angle changing with time, take 6 historical observation values, so that the sum of the squares of the errors between the true value and the observed value is minimized, that is ; let , and obtain

[0022] (1)

[0023] Solve the system of equations (1) simultaneously to obtain ; substitute into , and obtain the yaw angle at the moment ; similarly calculate the pitch angle, roll angle, longitude, latitude and elevation at the moment.

[0024] Preferably, the specific filtering and prediction method in step 6 is as follows:[[]]

[0025] At the moment , , , obtain the current azimuth angle or pitch angle, azimuth angular velocity or pitch angular velocity, azimuth angular velocity observation value or pitch angular acceleration observation value , , ; let , , be the azimuth angle or pitch angle, azimuth angular velocity or pitch angular velocity, azimuth angular acceleration filtering value or pitch angular acceleration filtering value,

[0026] (2)

[0027] (3)

[0028] Use equations (2) and (3) to predict the azimuth angle and pitch angle of the calibration satellite in the northeast celestial coordinate at the moment.

[0029] Preferably, the specific method for calculating the beam pointing angle in step 7 is as follows:[[]]

[0030] Let the azimuth angle of the calibration satellite in the northeast celestial coordinate system obtained by filtering and prediction at the moment be ; the pitch angle be

[0031] (4)

[0032] The antenna pattern automated test microservice calculates according to Equation (4). The azimuth angle at time and the elevation angle , where is the weighting coefficient;

[0033] According to the attitude angle of the phased array system predicted in step 4 at time, there is

[0034] (5)

[0035] (6)

[0036] Calculate the position in the rectangular coordinate system of the array surface at time using Equations (5) and (6); represents the distance from the calibration satellite in the array surface coordinate system; the numerical values of each variable in Equations (5) and (6) are all the predicted values at

[0037] Preferably, the specific method for calculating the beam pointing angle of the beam to be measured in step 8 is as follows:

[0038] Let be the azimuth test step size, be the azimuth pointing range, and the antenna pattern automated test microservice calculates the azimuth angle and the elevation angle of the beam to be measured according to Equation (7), and there is

[0039] (7)

[0040] Let be the elevation test step size, be the elevation pointing range; after the azimuth test is completed, there is

[0041] (8)

[0042] The antenna pattern automated test microservice calculates the elevation angle and the azimuth angle of the beam to be measured according to Equation (8).

[0043] Preferably, the specific method for interpolating the C / N0 values corresponding to the azimuth angles or elevation angles at two adjacent times in step 9 is as follows:

[0044] Let be the azimuth angle or elevation angle at any two adjacent times, be the C / N0 corresponding to the two azimuth angles or elevation angles, and with as the step size, there is

[0045] (9)

[0046] The amplitude processing microservice called by the antenna pattern automated test microservice interpolates the C / N0 values corresponding to the azimuth or elevation angles at two adjacent moments according to Equation (9), and sends the interpolation results to the test computer.

[0047] An electronic device includes a memory and a processor. The memory is used to store a program that supports the processor to execute the above-mentioned method for testing the antenna pattern of a mobile phased array antenna, and the processor is configured to execute the program stored in the memory.

[0048] A storage medium stores a computer program, and when the computer program is run by a processor, it executes the steps of the above-mentioned method for testing the antenna pattern of a mobile phased array antenna.

[0049] The advantages of the present invention are as follows:

[0050] The present invention tests the outfield antenna pattern of a mobile, especially vehicle-mounted phased array system during actual use. This system uses a calibration satellite and does not rely on a specific anechoic chamber environment and complex test equipment, and can conveniently, flexibly, quickly, and low-costly carry out pattern tests in a mobile scenario without affecting the task execution of other antenna beams.

[0051] At the same time, the present invention applies the microservice method to the antenna pattern test. The antenna automated test microservice calls the corresponding microservice combination according to the process to achieve one-key operation, avoids the complexity of traditional monolithic applications, reduces the system coupling, and truly realizes multi-antenna parallel testing. In the later stage, when the number of antennas increases, only the corresponding antenna pattern automated test microservice needs to be deployed, which greatly improves the robustness and scalability of the system.

[0052] Furthermore, the present invention calculates the position of the calibration satellite at the predicted moment using the predicted position and attitude information of the phased array system, and then performs a weighted calculation in combination with the position of the calibration satellite at the predicted moment calculated from the instantaneous orbital elements, which can prevent the filtering inaccuracy caused by observation noise or the antenna pointing angle calculation error caused by the error of the instantaneous orbital elements. On the basis of the stable tracking of the calibration satellite, the pattern test of the beam to be measured is realized. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 is a block diagram of the composition of a mobile phased array antenna pattern test system according to Embodiment 1 of the present invention;

[0054] Figure 2 is a schematic diagram of the microservice set of a mobile phased array antenna pattern test system according to Embodiment 1 of the present invention;

[0055] Figure 3 It is a flowchart of a method for testing the radiation pattern of a mobile phased array antenna according to Embodiment 2 of the present invention. Detailed implementation manners

[0056] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0057] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings of the specification and specific embodiments:

[0058] Embodiment 1

[0059] As Figure 1 shown, a block diagram of a system for testing the radiation pattern of a mobile phased array antenna according to Embodiment 1 of the present invention includes: a beam signal acquisition and processing system, a calibration satellite, an inertial navigation system, and a test computer. The test computer is deployed with a human-computer interaction interface, and a set of microservices required for testing is deployed in a cluster manner. Testers perform operations through the human-computer interaction interface, submit requests to the set of microservices, the microservices respond to the requests and execute corresponding automated test processes, and return the service call results to the human interface.

[0060] The beam signal acquisition and processing system includes a beam synthesis terminal, a signal processing terminal, and a signal distribution terminal. Among them, the beam synthesis terminal is responsible for synthesizing various beam data such as the beam to be tested, the tracking beam, and the working beam at the specified target angle position; the signal processing terminal consists of multiple signal processors, and the number of processors corresponds one-to-one to the number of synthesized beams, and is responsible for performing signal processing operations on the synthesized beam signals generated by the beam synthesis terminal, calculating the carrier-to-noise ratio C / N0, and simultaneously using the beam data generated by the beam synthesis terminal for sum-difference beam angle measurement, and sending the angle measurement result and C / N0 to the test computer; the signal distribution terminal is responsible for dynamically distributing and transmitting various types of data such as beam data, signal data, and pointing data; Figure 2 As shown, the phased array antenna forms 4 beams. Tracking beam 1 and calibration satellite 1 are used for testing beam 1 to be tested, and tracking beam 2 and calibration satellite 2 are used for testing beam 2 to be tested. During the maneuvering process of the phased array system, the tracking beam and the beam to be tested receive the signals sent by the calibration satellite in real time, and are transmitted to the signal processing terminal through the beam synthesis terminal. The signal processing terminal receives the beam data, demodulates it, performs sum-difference beam angle measurement, calculates the C / N0 at the current position, and sends the angle measurement result and C / N0 to the test computer.

[0061] The calibration satellite is an in-orbit satellite operating normally.

[0062] The inertial navigation system measures the position and attitude information of the phased array in real time during the maneuvering process of the phased array system, and sends the position and attitude information of the phased array system to the test computer at fixed time intervals.

[0063] It is particularly noted that the selection of the carrier-to-noise power spectrum density ratio C / N0 as the detection index is mainly based on two points. First, C / N0 is a common index in the field of signal processing. Most signal processing systems include this index and do not need to be specially obtained. Second, other indicators are mostly converted from C / N0, such as Eb / N0, AGC voltage, etc. The C / N0 selected by the present invention is a preferred embodiment.

[0064] The test computer deploys a set of microservices required by the human-computer interaction software and the test process. The test computer receives the instantaneous orbital elements to calculate the predicted angle of the calibration satellite in the northeast celestial coordinate system, filters the angle measurement results, and predicts the predicted angle of the calibration satellite in the northeast celestial coordinate system; the predicted angle and the predicted angle are combined to calculate the tracking beam pointing angle of the next period to guide the tracking calibration satellite, and the beam to be tested is controlled to point at a certain angle, and the C / N0 of different pointing angles of the test time series is obtained and then interpolated, and the final directional diagram test results are drawn and displayed on the human-computer interaction interface; according to the test process, the microservices are divided into a series of microservice sets, specifically including: parameter configuration microservice, orbit prediction microservice, phased array system attitude angle and position prediction microservice, angle measurement filtering microservice, antenna pointing angle calculation microservice, amplitude processing microservice, signal transmission configuration microservice, antenna directional diagram automatic testing microservice.

[0065] like Figure 2As shown in the figure, it is the composition of microservices in a mobile phased array antenna pattern test system according to Embodiment 1 of the present invention. The system functions are encapsulated into corresponding microservices according to the process. Specifically: the parameter configuration microservice is used to configure the frequency, beam scanning rate, and beam scanning range for the antenna, and configure parameters such as signal frequency, pseudo-code, code rate, and data rate for the signal processing terminal; the orbit prediction microservice is used to receive the instantaneous orbit elements and calculate the azimuth and elevation angles of the calibration satellite in the northeast celestial coordinate system according to the instantaneous orbit elements; the platform attitude angle and position prediction microservice is used to predict the position and attitude angle of the phased array system in the next cycle according to the historical position and attitude angle of the phased array system; the angle measurement filtering microservice is used to smooth and filter the angle measurement results at the current angle measurement moment and calculate the antenna pointing angle in the next cycle; the antenna pointing angle calculation microservice is used to calculate the antenna pointing angle in the next cycle and send it to the tracking beam and the beam to be measured; the amplitude processing microservice is used to interpolate the C / N0 data set calculated by signal processing and send the interpolation result to the human-computer interaction software; the signal transmission configuration microservice is used to configure the exchange node addresses of all devices that need to perform data interaction, so that dynamic data interaction can be carried out between devices in the system. The exchange node addresses can be divided into various forms according to different transmission methods, such as network exchange node addresses, RF matrix exchange node addresses, optical exchange node addresses, etc.; the antenna pattern automatic test microservice executes the one-key automatic test process of the beam to be measured by calling the microservices required by the test process. The number of them is the same as the maximum number of antenna beams generated by the phased array system, and each antenna automatic test microservice corresponds to an antenna beam test process.

[0066] Embodiment 2

[0067] As Figure 3 shown in the figure, it is a flowchart of a mobile phased array antenna pattern test method according to Embodiment 2 of the present invention. The test method includes the following steps:

[0068] In step 1, the tester executes the signal transmission allocation microservice response request through the human-computer interaction interface, sends the exchange node address that needs to be configured to the signal allocation terminal, and returns the operation result to the human-computer interaction interface.

[0069] In step 2, the tester executes signal processing and antenna parameter configuration through the human-computer interaction interface. The parameter configuration microservice responds to the request, sends the frequency, beam scanning rate, and beam scanning range of the antenna test to the beam synthesis terminal, configures parameters such as signal frequency, pseudo-code, code rate, and data rate to the signal processing terminal, and returns the operation result to the human-computer interaction interface.

[0070] In step 3, the tester executes the direction Figure 1Key test: The signal processing terminal receives the beam data of the tracking beam, demodulates it, performs sum-difference angle measurement, and sends the angle measurement observation value to the test computer.

[0071] In step 4, the antenna pattern automated test microservice calls the platform attitude angle and position prediction microservice at to extrapolate the phased array system attitude angle and position information at moment.

[0072] The inertial navigation installed on the phased array system sends the attitude angle information and position information at moment to the test computer. is the yaw angle, is the pitch angle, is the roll angle, is the longitude, is the longitude, is the elevation. Taking the yaw angle as an example, the test computer caches the historical data sequence , corresponding to the yaw angle observation data at moment. Let represent the function of the yaw angle changing with time. Take 6 historical observation values to minimize the sum of the squared errors between the true value and the observation value, that is . Let , and get

[0073] (1)

[0074] Solve the system of equations (1) simultaneously to obtain ; Substitute into to obtain the yaw angle at moment. Similarly, calculate the pitch angle, roll angle, longitude, latitude, and elevation at moment.

[0075] In step 5, the orbit prediction microservice receives the instantaneous orbit parameters of the calibration satellite. The antenna pattern automated test microservice combines the phased array system position information predicted in step 4 and calls the orbit prediction microservice at to calculate the azimuth angle and pitch angle of the calibration satellite in the northeast celestial coordinate system at moment. The instantaneous orbit parameters include the orbit epoch time, orbit semi-major axis, orbit eccentricity, orbit inclination, right ascension of the ascending node, argument of perigee, and mean anomaly.

[0076] In step 6, the antenna pattern automated test microservice is at Call the angle measurement filtering microservice at all times to filter and predict the angle measurement observations.

[0077] Obtain the current azimuth (or elevation angle), azimuth (or elevation angle) speed, and azimuth (or elevation angle) acceleration observation values at all times 、 、 ,Let 、 、 be the filtering values of the azimuth (or elevation angle), azimuth (or elevation angle) speed, and azimuth (or elevation angle) acceleration, 、 、 be the predicted values of the azimuth (or elevation angle), azimuth (or elevation angle) speed, and azimuth (or elevation angle) acceleration, and use equations (2) and (3) for prediction Calibrate the azimuth and elevation angles of the satellite in the northeast celestial coordinates at all times.

[0078] (2)

[0079] (3)

[0080] In step 7, the antenna pattern automated test microservice calls the beam pointing angle calculation microservice at to perform weighted processing on the angles filtered and output in step 6 and the predicted angles calculated in step 5, and convert them into the azimuth angle and elevation angle in the array coordinate system, and send this angle to the tracking beam and the beam to be measured.

[0081] Let the azimuth angle of the calibrated satellite predicted by filtering at in the northeast celestial coordinate system be , and the elevation angle be . The antenna pattern automated test microservice calculates the azimuth angle and elevation angle at using equation (4), where

[0082] (4)

[0083] According to the attitude angle of the phased array system predicted in step 4 at , use equations (5) and (6) to calculate the position in the rectangular coordinate system of the array at , represents the distance of the calibrated satellite in the array coordinate system. The numerical values of each variable in equations (5) and (6) are all Predicted value at a moment.

[0084] (5)

[0085] (6)

[0086] In step 8, At the first cycle, the tracking beam and the beam under test point to the calibration satellite according to the predicted angle. The signal processing receives the beam data, calculates the C / N0 at this position, sends it to the test computer, and records this value. At this time, the test computer calculates the pointing angles for subsequent cycles according to steps 4 to 7 and sends them to the tracking beam and the beam under test. The tracking beam stably points to the calibration satellite, and let be the azimuth test step size, be the azimuth pointing range. The antenna pattern automated test microservice calculates the azimuth angle and the elevation angle of the beam under test according to equation (7).

[0087] (7)

[0088] The signal processing calculates the C / N0 for each cycle and sends it to the test computer for recording.

[0089] Let be the elevation test step size, be the elevation pointing range. After the azimuth test is completed, the antenna pattern automated test microservice calculates the elevation angle and the azimuth angle of the beam under test according to equation (8).

[0090] (8)

[0091] The signal processing calculates the C / N0 for each cycle and sends it to the test computer for recording.

[0092] In step 9, let be the azimuth angle or elevation angle between any two adjacent moments, be the C / N0 corresponding to the two azimuth angles or elevation angles. Taking as the step size, the antenna pattern automated test microservice calls the amplitude processing microservice to interpolate the C / N0 values corresponding to the azimuth angles (or elevation angles) between two adjacent moments according to equation (9), and sends the interpolation results to the test computer.

[0093] (9)

[0094] In step 10, the human-computer interaction software of the test computer displays the C / N0 at different azimuth angles and elevation angles in a three-dimensional graphical manner on the human-computer interaction interface.

[0095] It should be noted that step 1 caches the switching node addresses of all antenna beams and the switching node addresses of signal processing. Any connected antenna can transmit beam data to the signal processing terminal through the signal distribution terminal. At the same time, the test computer is deployed with multiple antenna pattern test microservices. The tester can select multiple beams and call the corresponding microservice set according to steps 2 to 10 to complete the multi-beam pattern test.

[0096] The present invention provides a mobile phased array antenna pattern test system and method, comprising: a beam signal acquisition and processing system, a calibration satellite, an inertial navigation system, and a test computer. The beam signal acquisition and processing system comprises a beam synthesis terminal, a signal processing terminal, and a signal distribution terminal, wherein a beam to be tested and a tracking beam are generated by the beam synthesis terminal. During the maneuvering process of the phased array system, the tracking beam and the beam to be tested receive signals sent by the calibration satellite in real time, and transmit them to the signal processing terminal through the signal distribution terminal. The signal processing terminal receives beam data and demodulates it, performs sum and difference beam angle measurement, calculates C / N0 of the current position, and sends the angle measurement result and C / N0 to the test computer. The inertial navigation system sends the measured phased array system attitude and position information to the test computer at fixed time intervals in real time.

[0097] The test computer deploys human-computer interaction software and a set of microservices required for the test process, and is used to test the reception of instantaneous orbital elements to calculate the predicted angle of the calibration satellite in the northeast celestial coordinate system, and filter the angle measurement results to predict the predicted angle of the calibration satellite in the northeast celestial coordinate system, and jointly calculate the predicted angle and the predicted angle to guide the tracking calibration satellite. The tracking beam pointing angle of the next period is calculated, and the beam to be tested is controlled to point at a certain angle, and the C / N0 of different pointing angles of the test time series is obtained and interpolated, and the final directional diagram test results are drawn and displayed on the human-computer interaction interface.

[0098] The present invention can prevent the antenna pointing angle calculation error caused by inaccurate filtering due to observation noise or instantaneous orbit root error, and realizes the directional pattern test of the beam to be tested on the basis of stable tracking of the calibration satellite. In addition, the present invention does not rely on a specific indoor environment and complex test equipment, and can conveniently, flexibly, quickly and at low cost carry out directional pattern tests in mobile scenarios without affecting the task execution of other antennas. It truly achieves multi-antenna parallel testing. When the number of antennas increases in the later stage, it only needs to deploy the corresponding antenna directional pattern automatic test service, which greatly improves the robustness and scalability of the system.

[0099] Embodiment 3

[0100] An electronic device includes a memory and a processor. The memory is used to store a program that supports the processor to execute the above-mentioned method for testing the pattern of a mobile phased array antenna, and the processor is configured to execute the program stored in the memory.

[0101] Embodiment 4

[0102] A storage medium stores a computer program. When the computer program is run by a processor, it executes the steps of the above-mentioned method for testing the pattern of a mobile phased array antenna.

[0103] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for testing the pattern of a mobile phased array antenna, characterized in that It includes the following steps: Step 1: The tester executes the signal transmission and distribution microservice response request through the human-computer interaction interface, sends the exchange node address that needs to be configured to the signal distribution terminal, and returns the operation result to the human-computer interaction interface; Step 2: The tester executes the signal processing and beam synthesis parameter configuration through the human-computer interaction interface, and returns the operation result to the human-computer interaction interface; Step 3: The tester executes the one-key pattern test through the human-computer interaction interface. The signal processing terminal receives the beam data of the tracking beam, demodulates it, performs sum and difference angle measurement, and sends the angle measurement observation value to the test computer; Step 4: The antenna pattern automated test microservice calls the platform attitude angle and position prediction microservice to predict the attitude angle and position information of the phased array system in the next cycle; Step 5: The orbit prediction microservice receives the instantaneous orbit parameters of the calibration satellite. The antenna pattern automated test microservice calls the orbit prediction microservice, combines the phased array system position information predicted in Step 4, and calculates the azimuth angle and elevation angle of the calibration satellite in the northeast celestial coordinate system in the next cycle; Step 6: The antenna pattern automated test microservice calls the angle measurement filtering microservice at to filter and predict the angle measurement observations at that moment; Step 7: The antenna pattern automated test microservice calls the beam pointing angle calculation microservice to perform weighted processing on the predicted angle output by filtering and the predicted angle calculated from the instantaneous orbit parameters, and converts them into the azimuth angle and elevation angle in the array coordinate system, and sends this angle to the beam synthesis terminal; Step 8: In the first cycle, the tracking beam and the beam to be measured point to the calibration satellite according to the predicted angle. The signal processing terminal receives the beam data, calculates the C / N0 at this position and sends it to the test computer to record this value. The test computer sends the beam synthesis terminal according to the calculated beam pointing angle in the subsequent cycles. The tracking beam stably points to the calibration beam satellite, and the beam to be measured is offset by a certain angle for pointing in each cycle; Step 9: The antenna pattern automated test microservice calls the amplitude processing microservice to interpolate the C / N0 values corresponding to the azimuth angle or elevation angle at two adjacent moments, and sends the interpolation result to the test computer; Step 10: The human-computer interaction software of the test computer displays the C / N0 at different azimuth angles and elevation angles in a three-dimensional graph on the human-computer interaction interface.

2. The method for testing the radiation pattern of a mobile phased array antenna according to claim 1, characterized in that, The specific prediction method of the said Step 4 is: The inertial navigation system installed on the phased array system sends the attitude angle information and the position information to the test computer at is the yaw angle, is the pitch angle, is the roll angle, is the longitude, is the longitude, is the elevation; taking the yaw angle as an example, the test computer caches the historical data sequence , corresponding to the yaw angle observation data at the moment; let represent the function of the yaw angle changing with time, and take 6 historical observation values to minimize the sum of the squares of the errors between the true value and the observed value, that is ; let , and obtain （1） Solve the system of equations (1) simultaneously to obtain ; Substitute into to find the yaw angle at the moment ; Similarly, calculate the pitch angle, roll angle, longitude, latitude, and elevation at the moment .

3. The method for testing the pattern of a mobile phased array antenna according to claim 2, characterized in that, The specific filtering and prediction method of the said Step 6 is: Obtain the current azimuth angle or elevation angle, azimuth angular velocity or elevation angular velocity, azimuth angular velocity observation value or elevation angular acceleration observation value at all times 、 、 , let 、 、 be the filtered value of azimuth angle or elevation angle, azimuth angular velocity or elevation angular velocity, azimuth angular acceleration or elevation angular acceleration, 、 、 be the predicted value of azimuth angle or elevation angle, azimuth angular velocity or elevation angular velocity, azimuth angular acceleration or elevation angular acceleration, then there is （2） （3） Predict using Equation (2) and Equation (3). The azimuth and elevation angles of the calibration satellite at the northeast celestial coordinates at a certain moment.

4. A method for testing the pattern of a mobile phased array antenna according to claim 3, characterized in that The specific method for calculating the beam pointing angle in the said Step 7 is: Let the azimuth angle of the calibration satellite for time filtering prediction in the northeast celestial coordinate system be , and the elevation angle be ; there is （4） Among them, and are respectively the azimuth and elevation angles of the calibration satellite at the moment calculated in step 5 in the northeast celestial coordinate system; The antenna pattern automated test microservice calculates according to Equation (4) the azimuth angle at time and the elevation angle , where is the weighting coefficient; The attitude angles of the phased array system predicted according to step 4 at the moment are as follows （5） （6） Calculate using Equation (5) and Equation (6). The position in the rectangular coordinate system of the array plane at the moment; Indicates the distance from the sub-calibration satellite in the array coordinate system; the numerical values of each variable in Equation (5) and Equation (6) are all The predicted values at the moment.

5. The method for testing the pattern of a mobile phased array antenna according to claim 4, wherein The specific method for calculating the beam pointing angle of the beam to be measured in the said Step 8 is: Let be the azimuth test step size, be the azimuth pointing range, and the antenna pattern automated test microservice calculates the azimuth of the beam under test according to Equation (7) and the elevation angle , there is （7） Let be the pitch angle test step size, be the pointing range of the pitch angle; after the azimuth test is completed, there is （8） The automated test microservice for antenna pattern calculates the elevation angle of the beam under test according to Equation (8) and the azimuth angle .

6. The method for testing the pattern of a mobile phased array antenna according to claim 1, wherein The specific method for interpolating the C / N0 values corresponding to the azimuth angle or elevation angle at two adjacent moments in the said Step 9 is: Let be the azimuth or elevation angle at any two adjacent moments, be the C / N0 corresponding to the two azimuth or elevation angles, and be the step size, then there is （9） The antenna pattern automated test microservice calls the amplitude processing microservice to interpolate the C / N0 values corresponding to the azimuth angle or elevation angle at two adjacent moments according to Equation (9), and sends the interpolation result to the test computer.

7. An electronic device, comprising a memory and a processor, characterized in that The memory is used to store a program that supports the processor to execute the method for testing the pattern of a mobile phased array antenna according to any one of claims 1 to 6, and the processor is configured to execute the program stored in the memory.

8. A storage medium has a computer program stored thereon, characterized in that, When the computer program is run by the processor, it executes the steps of the method for testing the pattern of a mobile phased array antenna according to any one of claims 1 to 6.

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