A method and system for calibrating transmission direction of airborne phased array antenna

Abstract

The present application discloses a method and system for calibrating the transmission pointing of an airborne phased array antenna, the method comprising: obtaining the transmission pointing target value of the transmission array of the airborne phased array antenna; querying the correction data corresponding to the transmission pointing target value in the conical scanning correction database; the conical scanning correction database is updated in real time based on the conical scanning measured data fed back by the ground station, and stores the measured deviation values ​​under different transmission pointing targets; the transmission pointing correction value is calculated based on the transmission pointing target value and the correction data; and the wave control code is updated based on the transmission pointing correction value to adjust the phase of the transmission array. The present application obtains the correction data of the transmission pointing target value through the measured data of the conical scanning, and then uses the correction data to feedback adjust the transmission pointing target value, and performs real-time and precise adjustment on the transmission array pointing of the phased array antenna, effectively reducing the peak deviation of the transmit and receive beams, and improving the signal transmission and reception quality of the phased array antenna.

Description

Technical Field

[0001] The present application relates to the field of antenna control technology, and in particular to a method and system for calibrating the transmission direction of an airborne phased array antenna. Background Art

[0002] Traditional mechanical antennas or flat antennas use the same radiator or array for transmission and reception, so the peak difference between the transmit and receive beams is fixed. Therefore, as long as the receive beam can track and lock the satellite beam carrier, its transmit beam can also track and lock the satellite beam at the same time. However, for phased array antennas, different radiating arrays are used for RF reception and RF transmission respectively, so the peak difference between the transmit and receive beams is not fixed. In particular, as the receive array and transmit array of the phased array antenna change to varying degrees due to antenna aging and temperature changes, the difference will become larger and larger, affecting the signal reception and transmission quality of the antenna, especially when using Ka-band high-orbit satellites with small spot beams.

[0003] In view of this, providing a solution to the above-mentioned technical problems has become an urgent concern for those skilled in the art. Summary of the invention

[0004] The purpose of the present application is to provide a method and system for calibrating the transmission pointing of an airborne phased array antenna, so as to effectively reduce the peak deviation of the receiving and transmitting beams of the phased array antenna and improve the signal receiving and transmitting quality.

[0005] In order to solve the above technical problems, on the one hand, the present application discloses a method for calibrating the transmission direction of an airborne phased array antenna, comprising:

[0006] Obtaining a transmission pointing target value of a transmission array of the airborne phased array antenna;

[0007] Querying the correction data corresponding to the emission pointing target value in the conical scanning correction database; the conical scanning correction database is updated in real time based on the conical scanning measured data fed back by the ground station, and stores the measured deviation values ​​under different emission pointing targets;

[0008] Calculating an emission pointing correction value based on the emission pointing target value and the correction data;

[0009] A wave control code is updated based on the transmit pointing correction value to adjust the phase of the transmit array.

[0010] Optionally, the acquiring a transmission pointing target value of a transmission array of the airborne phased array antenna includes:

[0011] The receiving orientation of the receiving array of the airborne phased array antenna is obtained and used as the transmitting orientation target value.

[0012] Optionally, the acquiring the receiving orientation of the receiving array of the airborne phased array antenna and using the receiving orientation as the transmitting orientation target value comprises:

[0013] Calculating the initial receiving pointing value of the receiving array based on the heading information of the airborne inertial reference system and the longitude and latitude information of the satellite;

[0014] Generate a wave control code based on the initial receiving pointing value to control the phase of the receiving array;

[0015] According to the intermediate frequency signal from the receiving array, a preset beam tracking algorithm is used to adjust and generate a precise receiving pointing value;

[0016] The wave control code is updated based on the receiving pointing precise value to adjust the phase of the receiving array, and the receiving pointing precise value is used as the transmitting pointing target value.

[0017] Optionally, the heading information includes attitude information, heading information, longitude and latitude information, and altitude information of the airborne inertial reference system.

[0018] Optionally, the generating a wave control code based on the receiving pointing initial value to control the phase of the receiving array includes:

[0019] Calculate and generate a wave control code false value according to the pitch angle value and the azimuth angle value of the airborne inertial reference system;

[0020] Obtaining the corresponding wave control code correction value by querying the antenna channel calibration database;

[0021] The sum of the wave control code false value and the wave control code correction value is used as the wave control code to control the phase of the receiving array.

[0022] Optionally, the updating process of the cone scanning correction database includes:

[0023] During the conical scanning process, receiving the conical scanning measured data fed back from the ground station;

[0024] Determining whether the maximum value point of the conical scanning measured data corresponds to the center point of the airborne phased array antenna;

[0025] If not, the deviation between the maximum value point of the cone scanning measured data and the current emission pointing target value is calculated and stored in the cone scanning correction database as correction data.

[0026] Optionally, before determining whether the maximum value point of the conical scanning measured data corresponds to the center point of the airborne phased array antenna, the method further includes:

[0027] Calculating the signal-to-noise ratio of the intermediate frequency signal from the receiving array;

[0028] Determining whether the signal-to-noise ratio reaches a maximum value at a center point of the airborne phased array antenna;

[0029] If yes, then executing the step of determining whether the maximum value point of the conical scanning measured data corresponds to the center point of the airborne phased array antenna and subsequent steps;

[0030] If not, the receiving array is calibrated and the conical scan is restarted.

[0031] Optionally, calculating the deviation between the maximum value point of the cone scanning measured data and the current emission pointing target value, and storing the deviation value as correction data in the cone scanning correction database, comprises:

[0032] Querying whether the conical scanning correction database has corresponding historical correction data;

[0033] If there is no historical correction data, the step of calculating the deviation between the maximum value point of the cone scanning measured data and the current emission pointing target value is performed, and storing the deviation value in the cone scanning correction database as the correction data;

[0034] If there is historical correction data and it is inconsistent with the currently calculated correction data, the correction data is updated and calculated again through cone scanning;

[0035] If the correction data calculated twice are consistent, the consistent correction data will be correspondingly stored in the cone scanning correction database.

[0036] Optionally, before starting the cone scan, the method further includes:

[0037] Determine whether the idleness of the airborne satellite communication system meets the preset requirements;

[0038] If yes, cone scanning is started.

[0039] On the other hand, the present application also discloses a transmission pointing adjustment system for an airborne phased array antenna, comprising:

[0040] A conical scanning processing module, used to update and generate a conical scanning correction database in real time based on the conical scanning measured data fed back by the ground station, wherein the conical scanning correction database stores measured deviation values ​​under different emission pointing targets;

[0041] A transmission pointing acquisition module, used to obtain a transmission pointing target value of a transmission array of the airborne phased array antenna;

[0042] An emission pointing correction module, used to query the cone scanning correction database for correction data corresponding to the emission pointing target value; and calculate an emission pointing correction value based on the emission pointing target value and the correction data;

[0043] The transmitting wave control code control module is used to update and generate the wave control code based on the transmitting pointing correction value to adjust the phase of the transmitting array.

[0044] Optionally, it also includes:

[0045] A receiving pointing calculation module, used to calculate the initial value of the receiving pointing of the receiving array based on the heading information of the airborne inertial reference system and the longitude and latitude information of the satellite;

[0046] A receiving wave control code control module, used for generating a wave control code based on the receiving pointing initial value to control the phase of the receiving array;

[0047] A beam tracking algorithm module is used to adjust and generate a precise receiving pointing value based on the intermediate frequency signal from the receiving array using a preset beam tracking algorithm, and send the precise receiving pointing value as the transmitting pointing target value to the transmitting pointing acquisition module, and the receiving wave control code control module updates and generates a wave control code to control the phase of the receiving array.

[0048] The beneficial effects of the transmission pointing calibration method and system for an airborne phased array antenna provided in the present application are as follows: the present application obtains correction data of a transmission pointing target value through measured data of conical scanning, and then uses the correction data to perform feedback adjustment on the transmission pointing target value, thereby performing real-time and precise adjustment of the transmission array pointing of the phased array antenna, effectively reducing the peak deviation of the transmit and receive beams, and improving the signal reception and transmission quality of the phased array antenna. BRIEF DESCRIPTION OF THE DRAWINGS

[0049] In order to more clearly illustrate the technical solutions in the prior art and the embodiments of the present application, the drawings required for use in the description of the prior art and the embodiments of the present application are briefly introduced below. Of course, the drawings described below in relation to the embodiments of the present application are only part of the embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without creative work, and the obtained other drawings also belong to the protection scope of the present application.

[0050] Figure 1 A flow chart of a method for calibrating the transmission direction of an airborne phased array antenna disclosed in an embodiment of the present application;

[0051] Figure 2 A flowchart of a method for obtaining a transmission pointing target value disclosed in an embodiment of the present application;

[0052] Figure 3 A flowchart of a method for updating and generating a conical scanning correction database disclosed in an embodiment of the present application;

[0053] Figure 4 A structural block diagram of a transmission pointing calibration system for an airborne phased array antenna disclosed in an embodiment of the present application. DETAILED DESCRIPTION

[0054] The core of the present application is to provide a method and system for calibrating the transmission pointing of an airborne phased array antenna, so as to effectively reduce the peak deviation of the receiving and transmitting beams of the phased array antenna and improve the signal receiving and transmitting quality.

[0055] In order to describe the technical solutions in the embodiments of the present application more clearly and completely, the technical solutions in the embodiments of the present application will be introduced below in conjunction with the drawings in the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of this application.

[0056] See also Figure 1 As shown, the embodiment of the present application discloses a method for calibrating the transmission direction of an airborne phased array antenna, which mainly includes:

[0057] S101: Acquire a transmission pointing target value of a transmission array of an airborne phased array antenna.

[0058] Specifically, in order to maintain synchronous tracking of the transmit and receive beams of the phased array antenna, the receive pointing of the receive array of the airborne phased array antenna may be specifically acquired so as to serve as a transmit pointing target value.

[0059] S102: Query the cone scanning correction database for correction data corresponding to the emission pointing target value.

[0060] The conical scanning correction database is updated in real time based on the conical scanning measured data fed back by the ground station, and stores the measured deviation values ​​under different launch pointing targets.

[0061] S103: Calculate the transmission pointing correction value based on the transmission pointing target value and the correction data.

[0062] S104: Update the beam control code based on the transmission pointing correction value to adjust the phase of the transmission array.

[0063] It should be noted that the transmission pointing calibration method of the airborne phased array antenna provided in the embodiment of the present application adopts a feedback adjustment mode to accurately calibrate the transmission pointing of the transmitting array in real time, thereby effectively ensuring the synchronous tracking and locking of the transmitting beam and the receiving beam, and reducing the peak deviation of the transmitting and receiving beams. Among them, those skilled in the art understand that the transmission pointing specifically refers to the pitch angle value and the azimuth angle value.

[0064] Specifically, the present application performs feedback calibration on the emission pointing target value through continuous conical scanning to obtain the emission pointing correction value. After the emission pointing target value of the emission array is obtained, the corresponding wave control code can be generated based on the emission pointing target value to control the phase of the emission array. At the same time, based on the emission pointing target value, the conical scanning correction database can be queried to obtain the corresponding correction data, and the emission pointing target value and its correction data can be combined to obtain the emission pointing correction value, so as to regenerate a more accurate wave control code to readjust the phase of the emission array.

[0065] Among them, when generating the corresponding wave control code according to the transmission pointing target value or the transmission pointing correction value, a wave control code false value can be first calculated based on the pitch angle value and the azimuth angle value, and then the corresponding wave control code correction value is obtained by querying the antenna channel calibration database, and then the wave control code false value is added to the corresponding wave control code correction value to obtain the corresponding wave control code.

[0066] Specifically, the wave control code false value can be calculated according to the following formula:

[0067] C(dx,dy)=-2π(dx*sinθ*cosφ+dy*cosθ*sinφ) / λ;

[0068] Among them, dx and dy refer to the coordinates of the array element, φ refers to the pitch angle, θ refers to the azimuth angle, and λ refers to the central operating frequency wavelength.

[0069] The conical scanning correction database can be updated by continuously starting conical scanning. Based on the conical scanning measured data from the ground station, the measured deviation values ​​under different emission pointing targets can be calculated, and then updated and stored in the conical scanning correction database. The data in the conical scanning correction database is indexed by each emission pointing target value, and the corresponding measured deviation values ​​are recorded as correction data, including the measured deviation values ​​of the pitch angle and the measured deviation values ​​of the azimuth angle.

[0070] It can be seen that the transmission pointing calibration method of the airborne phased array antenna provided in the present application obtains the correction data of the transmission pointing target value through the measured data of conical scanning, and then uses the correction data to feedback adjust the transmission pointing target value, thereby performing real-time and precise adjustment of the transmission array pointing of the phased array antenna, effectively reducing the peak deviation of the transmit and receive beams, and improving the signal reception and transmission quality of the phased array antenna.

[0071] As a specific embodiment, the transmission pointing adjustment method of the airborne phased array antenna provided in the embodiment of the present application is based on the above content, see Figure 2 As shown, the embodiment of the present application discloses a method for obtaining a transmission pointing target value, which mainly includes:

[0072] S201: Calculate the initial receiving pointing value of the receiving array based on the heading information of the airborne inertial reference system (IRS) and the longitude and latitude information of the satellite.

[0073] Specifically, the heading information includes attitude information, heading information, longitude and latitude information, and altitude information of the airborne inertial reference system, which can be obtained from the airborne IRS. In addition, the longitude and latitude information of the satellite can be obtained from the modem and management unit.

[0074] S202: Generate a wave control code based on the initial value of the receiving direction to control the phase of the receiving array.

[0075] S203: Based on the intermediate frequency signal from the receiving array, a preset beam tracking algorithm is used to adjust and generate a precise receiving pointing value.

[0076] The beam tracking algorithm may specifically adopt a sum-difference beam tracking algorithm.

[0077] S204: updating the beam control code based on the receiving pointing precise value to adjust the phase of the receiving array, and using the receiving pointing precise value as the transmitting pointing target value.

[0078] The generation process of the beam control code of the receiving array is similar to that of the beam control code of the transmitting array. When the beam control code is generated based on the initial value of the receiving pointing or the precise value of the receiving pointing, it may specifically include:

[0079] According to the elevation angle value and the azimuth angle value, a wave control code false value is calculated and generated; the corresponding wave control code correction value is obtained by querying the antenna channel calibration database; the sum of the wave control code false value and the wave control code correction value is used as the wave control code to control the phase of the receiving array.

[0080] As a specific embodiment, the transmission pointing adjustment method of the airborne phased array antenna provided in the embodiment of the present application is based on the above content, see Figure 3 As shown, the embodiment of the present application discloses a method for updating and generating a conical scanning correction database, which mainly includes:

[0081] S301: Determine whether the idleness of the airborne satellite communication system meets the preset requirement; if so, proceed to S302.

[0082] Specifically, when the current communication rate of the airborne satellite communication system is much lower than the average communication rate over a period of time, that is, v <A·v c When it is established, it can be determined that the idleness of the airborne satellite communication system has reached the preset requirement. Where v is the current communication rate, v cis the average communication rate, A is a parameter less than 1, and, considering setting a 3dB communication link loss and a 2dB margin for conical scanning, A can be specifically taken as a parameter less than 0.3.

[0083] On the contrary, if v <A·v c If not, you can wait until the idleness increases to meet the requirements.

[0084] S302: Sending a conical scanning plan to a ground station via a modem and management unit, and starting the conical scanning after receiving confirmation information from the ground station.

[0085] Specifically, the scanning plan may specifically include the number of scanning points, scanning start time, scanning end time, etc. For example, generally, the number of points of the conical scanning may be set to 5: the deviation angle of the conical scanning is set to γ ​​(γ is generally not more than 0.25 degrees), and the 5 scanning points may be determined as:

[0086] Center point;

[0087] The two scanning points corresponding to the pitch angle deviation of ±γ angle;

[0088] The azimuth angles deviate from the two scanning points corresponding to the ±γ angle.

[0089] S303: receiving the cone scanning measured data fed back from the ground station during the cone scanning process.

[0090] Specifically, the conical scanning plan is also sent to the receiving array and the transmitting array to start the conical scanning in cooperation with the ground station and receive the conical scanning measured data from the ground station.

[0091] S304: Calculate the signal-to-noise ratio of the intermediate frequency signal from the receiving array.

[0092] S305: Determine whether the signal-to-noise ratio reaches a maximum value at the center point of the airborne phased array antenna; if so, proceed to S306; if not, proceed to S308.

[0093] Specifically, if the signal-to-noise ratio of the intermediate frequency signal of the receiving array reaches the maximum value at the center point of the airborne phased array antenna, it means that the direction of the receiving array is correct, and the calibration of the transmitting array can be carried out normally. Otherwise, it is necessary to calibrate the direction of the receiving array first, and then start the calibration of the transmitting array.

[0094] S306: Determine whether the maximum value point of the conical scanning measured data corresponds to the center point of the airborne phased array antenna; if not, proceed to S307.

[0095] Specifically, if the maximum value point of the conical scanning measured data corresponds to the center point of the airborne phased array antenna, it means that the currently used transmit pointing target value is correct and no correction is required. The transmit pointing target value can continue to be used to control the phase of the transmit array.

[0096] S307: Calculate the deviation between the maximum value point of the cone scanning measured data and the current emission pointing target value, and store it in the cone scanning correction database as correction data.

[0097] If the maximum value point of the conical scanning measured data does not correspond to the center point of the airborne phased array antenna, it means that the current transmission pointing target value needs to be corrected. The correction data is the deviation value between the maximum value point of the conical scanning measured data and the current transmission pointing target value, including the pitch angle deviation value and the azimuth angle deviation value.

[0098] S308: Calibrate the receiving array; proceed to S302.

[0099] As a specific embodiment, the transmission pointing calibration method of the airborne phased array antenna provided in the embodiment of the present application calculates the deviation value between the maximum value point of the conical scanning measured data and the current transmission pointing target value on the basis of the above content, and stores it in the conical scanning correction database as correction data, which may specifically include:

[0100] Query whether there is corresponding historical correction data in the conical scanning correction database;

[0101] If there is no historical correction data, the step of calculating the deviation between the maximum value point of the cone scanning measured data and the current emission pointing target value is performed, and storing the deviation value in the cone scanning correction database as the correction data;

[0102] If there is historical correction data and it is inconsistent with the currently calculated correction data, the correction data is updated and calculated again through cone scanning;

[0103] If the correction data calculated twice are consistent, the consistent correction data will be correspondingly stored in the cone scanning correction database.

[0104] Specifically, if there is no historical correction data, the currently calculated correction data can be directly stored in the cone scanning correction database. If there is historical correction data and it is consistent with the currently calculated correction data, there is no need to modify the cone scanning correction database. If there is historical correction data and it is inconsistent with the currently calculated correction data, the cone scanning can be re-calculated and the correction data can be re-calculated. If the twice calculated correction data are consistent, they are updated and stored in the cone scanning correction database.

[0105] See also Figure 4As shown, the embodiment of the present application discloses a transmission pointing adjustment system for an airborne phased array antenna, which mainly includes:

[0106] The conical scanning processing module 401 is used to update and generate a conical scanning correction database in real time based on the conical scanning measured data fed back by the ground station, and the conical scanning correction database stores the measured deviation values ​​under different emission pointing targets;

[0107] The transmission pointing acquisition module 402 is used to obtain the transmission pointing target value of the transmission array of the airborne phased array antenna;

[0108] The emission pointing correction module 403 is used to query the correction data corresponding to the emission pointing target value in the conical scanning correction database; calculate the emission pointing correction value based on the emission pointing target value and the correction data;

[0109] The transmitting beam control code control module 404 is used to update and generate the beam control code based on the transmitting pointing correction value to adjust the phase of the transmitting array.

[0110] It can be seen that the transmission pointing calibration system of the airborne phased array antenna disclosed in the embodiment of the present application obtains the correction data of the transmission pointing target value through the measured data of conical scanning, and then uses the correction data to feedback adjust the transmission pointing target value, thereby performing real-time and precise adjustment of the transmission array pointing of the phased array antenna, effectively reducing the peak deviation of the transmit and receive beams, and improving the signal reception and transmission quality of the phased array antenna.

[0111] For specific contents of the transmission pointing calibration system of the above-mentioned airborne phased array antenna, reference may be made to the detailed introduction of the transmission pointing calibration method of the airborne phased array antenna mentioned above, which will not be repeated here.

[0112] As a specific embodiment, the transmission pointing calibration system of the airborne phased array antenna disclosed in the embodiment of the present application further includes:

[0113] The receiving orientation calculation module 405 is used to calculate the initial receiving orientation value of the receiving array based on the heading information of the airborne inertial reference system and the longitude and latitude information of the satellite;

[0114] A receiving wave control code control module 406 is used to generate a wave control code based on the receiving pointing initial value to control the phase of the receiving array;

[0115] The beam tracking algorithm module 407 is used to adjust and generate the receiving pointing precise value according to the intermediate frequency signal from the receiving array using the preset beam tracking algorithm, and send the receiving pointing precise value as the transmitting pointing target value to the transmitting pointing acquisition module 402, and the receiving wave control code control module 406 updates and generates the wave control code to control the phase of the receiving array.

[0116] As a specific embodiment, the transmission pointing calibration system of the airborne phased array antenna disclosed in the embodiment of the present application further includes:

[0117] The modem and management unit 408 is connected to the receiving direction calculation module.

[0118] As a specific embodiment, the transmission pointing calibration system of the airborne phased array antenna disclosed in the embodiment of the present application is based on the above content, and the receiving wave control code control module 406 generates a wave control code based on the initial value of the receiving pointing to control the phase of the receiving array, which is specifically used to:

[0119] According to the pitch angle value and azimuth angle value of the airborne inertial reference system, a wave control code false value is calculated and generated; the corresponding wave control code correction value is obtained by querying the antenna channel calibration database; the sum of the wave control code false value and the wave control code correction value is used as the wave control code to control the phase of the receiving array.

[0120] As a specific embodiment, the transmission pointing calibration system of the airborne phased array antenna disclosed in the embodiment of the present application is based on the above content, and the conical scanning processing module 401 is specifically used to update and generate the conical scanning correction database:

[0121] During the process of starting the conical scan, the measured conical scan data fed back from the ground station is received; it is determined whether the maximum value point of the measured conical scan data corresponds to the center point of the airborne phased array antenna; if not, the deviation value between the maximum value point of the measured conical scan data and the current transmission pointing target value is calculated, and stored in the conical scan correction database as correction data.

[0122] As a specific embodiment, the transmission pointing calibration system of the airborne phased array antenna disclosed in the embodiment of the present application is based on the above content, and the conical scanning processing module 401 is also used for:

[0123] Before determining whether the maximum value point of the conical scanning measured data corresponds to the center point of the airborne phased array antenna, the signal-to-noise ratio of the intermediate frequency signal from the receiving array is calculated to determine whether the signal-to-noise ratio reaches the maximum value at the center point of the airborne phased array antenna; if so, the conical scanning processing module 401 determines whether the maximum value point of the conical scanning measured data corresponds to the center point of the airborne phased array antenna; if not, the receiving array is calibrated and the conical scanning is restarted.

[0124] As a specific embodiment, the transmission pointing calibration system of the airborne phased array antenna disclosed in the embodiment of the present application is based on the above content. When the conical scanning processing module 401 calculates the deviation value between the maximum value point of the conical scanning measured data and the current transmission pointing target value, and stores it in the conical scanning correction database as correction data, it is specifically used to:

[0125] Check whether there is corresponding historical correction data in the cone scanning correction database; if there is no historical correction data, the cone scanning processing module 401 calculates the deviation between the maximum value point of the cone scanning measured data and the current emission pointing target value, and stores it in the cone scanning correction database as correction data;

[0126] If there is historical correction data and it is inconsistent with the currently calculated correction data, the conical scanning processing module 401 will update the calculated correction data again through conical scanning; if the correction data calculated twice are consistent, the conical scanning processing module 401 will be used to store the consistent correction data in the conical scanning correction database.

[0127] As a specific embodiment, the transmission pointing calibration system of the airborne phased array antenna disclosed in the embodiment of the present application further includes:

[0128] The conical scanning control module 409 is used to determine whether the idleness of the airborne satellite communication system meets the preset requirement; if so, the conical scanning is started.

[0129] As a specific embodiment, the transmission pointing adjustment system of the airborne phased array antenna disclosed in the embodiment of the present application is based on the above content, and the conical scanning control module 409 is also used for:

[0130] Before starting the conical scan, the conical scan plan is sent to the ground station through the modem and management unit 408, and the conical scan is started after receiving the confirmation information from the ground station.

[0131] In this application, each embodiment is described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the embodiments can be referred to each other. For the device disclosed in the embodiment, since it corresponds to the method disclosed in the embodiment, the description is relatively simple, and the relevant parts can be referred to the method part.

[0132] It should also be noted that, in this application document, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. In addition, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, an element defined by the statement "comprises a ..." does not exclude the presence of other identical elements in the process, method, article or device including the element.

[0133] The technical solution provided by the present application is described in detail above. The principle and implementation method of the present application are described in detail using specific examples herein, and the description of the above embodiments is only used to help understand the method and core idea of ​​the present application. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the present application, several improvements and modifications can be made to the present application, and these improvements and modifications also fall within the scope of protection of the present application.

Claims

1. A method for calibrating the transmission direction of an airborne phased array antenna, characterized in that: include: Based on the heading information of the airborne inertial reference system and the longitude and latitude information of the satellite, the initial receiving pointing value of the receiving array is calculated; Generate a wave control code based on the initial receiving pointing value to control the phase of the receiving array; According to the intermediate frequency signal from the receiving array, a preset beam tracking algorithm is used to adjust and generate a precise receiving pointing value; updating the beam control code based on the receiving pointing precise value to adjust the phase of the receiving array, and using the receiving pointing precise value as the transmitting pointing target value; Querying the correction data corresponding to the emission pointing target value in the conical scanning correction database; the conical scanning correction database is updated in real time based on the conical scanning measured data fed back by the ground station, and stores the measured deviation values ​​under different emission pointing targets; Calculate an emission pointing correction value based on the emission pointing target value and the correction data; wherein the emission pointing correction value is the sum of the emission pointing target value and the correction data; Based on the transmission pointing correction value, the wave control code is updated and generated to adjust the phase of the transmission array; Wherein, updating the beam control code based on the receiving pointing precise value to adjust the phase of the receiving array or updating and generating the beam control code based on the transmitting pointing correction value to adjust the phase of the transmitting array includes: Calculate and generate a wave control code false value according to the pitch angle value and the azimuth angle value of the airborne inertial reference system; Obtaining the corresponding wave control code correction value by querying the antenna channel calibration database; The sum of the wave control code false value and the wave control code correction value is used as the wave control code to control the phase of the receiving array or the phase of the transmitting array.

2. The method for calibrating the transmission direction according to claim 1, characterized in that: The updating process of the cone scanning correction database includes: During the conical scanning process, receiving the conical scanning measured data fed back from the ground station; Determining whether the maximum value point of the conical scanning measured data corresponds to the center point of the airborne phased array antenna; If not, the deviation between the maximum value point of the cone scanning measured data and the current emission pointing target value is calculated and stored in the cone scanning correction database as correction data.

3. The method for calibrating the transmission direction according to claim 2, characterized in that: Before determining whether the maximum value point of the conical scanning measured data corresponds to the center point of the airborne phased array antenna, the method further includes: Calculating the signal-to-noise ratio of the intermediate frequency signal from the receiving array; Determining whether the signal-to-noise ratio reaches a maximum value at a center point of the airborne phased array antenna; If yes, then executing the step of determining whether the maximum value point of the conical scanning measured data corresponds to the center point of the airborne phased array antenna and subsequent steps; If not, the receiving array is calibrated and the conical scan is restarted.

4. The method for calibrating the transmission direction according to claim 3, characterized in that: The step of calculating the deviation between the maximum value point of the cone scanning measured data and the current emission pointing target value and storing the deviation value as correction data in the cone scanning correction database includes: Querying whether the conical scanning correction database has corresponding historical correction data; If there is no historical correction data, the step of calculating the deviation between the maximum value point of the cone scanning measured data and the current emission pointing target value is performed, and storing the deviation value in the cone scanning correction database as the correction data; If there is historical correction data and it is inconsistent with the currently calculated correction data, the correction data is updated and calculated again through cone scanning; If the correction data calculated twice are consistent, the consistent correction data will be correspondingly stored in the cone scanning correction database.

5. The method for calibrating the transmission direction according to claim 4, characterized in that: Before starting the cone scan, also include: Determine whether the idleness of the airborne satellite communication system meets the preset requirements; If yes, cone scanning is started.

6. A transmission pointing calibration system for an airborne phased array antenna, characterized in that: include: A conical scanning processing module, used to update and generate a conical scanning correction database in real time based on the conical scanning measured data fed back by the ground station, wherein the conical scanning correction database stores measured deviation values ​​under different emission pointing targets; A receiving pointing calculation module is used to calculate the initial value of the receiving pointing of the receiving array based on the heading information of the airborne inertial reference system and the longitude and latitude information of the satellite; A receiving wave control code control module, used for generating a wave control code based on the receiving pointing initial value to control the phase of the receiving array; A beam tracking algorithm module is used to adjust and generate a receiving pointing precise value using a preset beam tracking algorithm according to the intermediate frequency signal from the receiving array, send the receiving pointing precise value as a transmitting pointing target value to the transmitting pointing acquisition module, and update the generated wave control code by the receiving wave control code control module to control the phase of the receiving array; A transmission pointing acquisition module, used to obtain a transmission pointing target value of a transmission array of the airborne phased array antenna; An emission pointing correction module, used for searching the conical scanning correction database for correction data corresponding to the emission pointing target value; calculating an emission pointing correction value based on the emission pointing target value and the correction data; wherein the emission pointing correction value is the sum of the emission pointing target value and the correction data; A transmitting wave control code control module is used to update and generate the wave control code based on the transmitting pointing correction value to adjust the phase of the transmitting array; wherein, updating the wave control code based on the receiving pointing precise value to adjust the phase of the receiving array or updating and generating the wave control code based on the transmitting pointing correction value to adjust the phase of the transmitting array comprises: calculating and generating a wave control code false value according to the pitch angle value and the azimuth angle value of the airborne inertial reference system; acquiring the corresponding wave control code correction value by querying the antenna channel calibration database; and taking the sum of the wave control code false value and the wave control code correction value as the wave control code to control the phase of the receiving array or the phase of the transmitting array.

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