Laser communication link establishment method and device based on microwave chain direction finding guidance, and storage medium

Abstract

The invention belongs to the field of laser communication, and particularly relates to a laser communication link establishment method and device based on microwave chain direction finding guidance and a storage medium. The objective of the invention is to solve the problem of low positioning precision of existing laser communication link establishment. The invention provides a laser communication link establishment method based on microwave link direction finding guidance. The method comprises the following steps: carrying out snakelike scanning to receive a microwave signal; when the microwave signal is detected, coarse alignment processing is carried out, and coarse alignment is completed; fine alignment processing is carried out after the coarse alignment processing, and a laser communication link is established between the first laser communication terminal and the second laser communication terminal after the fine alignment processing. Through microwave direction finding guiding positioning, the technical problems of long laser communication link establishment time and low success probability at present are solved, the original initial uncertain angle range is reduced from + / -0.5 degrees to + / -0.1 degrees, the scanning capture time is shortened by more than tens of times, and the method has important significance for laser communication link establishment between high-speed mobile platforms.

Description

TECHNICAL FIELD

[0001] The application belongs to the field of laser communication, and particularly relates to a laser communication link establishment method based on microwave chain direction finding. BACKGROUND

[0002] The ground laser communication cannot use orbit data as the basis for angle calculation, and can only use navigation data to realize positioning, but has difficulty in orientation, which makes the ground laser communication network unable to quickly orient and position at the initial stage, and realize link establishment. The orientation accuracy of the existing orientation device is generally about 0.5° (1 sigma), which is too large compared with the 0.15-degree field of view of the commonly used laser communication. The cost of the high-precision orientation device can reach more than 500,000 yuan, which is very expensive.

[0003] At present, the ground laser communication orientation generally adopts electronic compass orientation, optical fiber gyro orientation and navigation differential orientation, but these methods have their own shortcomings. The electronic compass needs to be away from magnetic metals such as steel to prevent electromagnetic interference from affecting its orientation, but the laser communication terminal generally needs a servo motor as a driving device, and the electromagnetic interference caused by the servo motor cannot be ignored. The optical fiber gyro can effectively avoid the orientation interference caused by electromagnetic interference, but its cost is very high and is not suitable for civilian use. The navigation differential method can also realize initial orientation, but the baseline of the two antennas needs to have a distance of at least 1 m, and the equipment volume is large. Therefore, the existing laser communication link establishment has the problem of low positioning accuracy. SUMMARY

[0004] The application aims to solve the problem of low positioning accuracy of the existing laser communication link establishment. A laser communication link establishment method based on microwave chain direction finding is provided, which comprises:

[0005] Step one, setting the scanning parameters of the first laser communication terminal and the second laser communication terminal;

[0006] Step two, the first laser communication terminal and the second laser communication terminal simultaneously emit microwave signals;

[0007] Step three, the first laser communication terminal and the second laser communication terminal perform serpentine scanning to receive the microwave signals; when the first laser communication terminal and the second laser communication terminal both detect the microwave signals,

[0008] The interactive information is contained in the microwave signal code, and the interactive signal is determined after the mutual terminal is determined, and then the coarse alignment is performed;

[0009] The first laser communication terminal and the second laser communication terminal perform coarse alignment processing according to the received microwave signals, and complete the coarse alignment;

[0010] Step four, the first laser communication terminal and the second laser communication terminal after the rough alignment processing are subjected to fine alignment processing, and the first laser communication terminal and the second laser communication terminal after the fine alignment processing establish a laser communication link.

[0011] A computer storage medium, characterized in that the storage medium stores at least one instruction, the at least one instruction is loaded and executed by a processor to realize the microwave chain direction finding guided laser communication link establishment method.

[0012] A microwave chain direction finding guided laser communication link establishment device, characterized in that the device comprises a processor and a memory, and the memory stores at least one instruction, the at least one instruction is loaded and executed by the processor to realize the microwave chain direction finding guided laser communication link establishment method.

[0013] The beneficial effects of the present application are:

[0014] By microwave direction finding guidance positioning, the technical problems of long laser communication link establishment time and low success probability are solved, the original initial uncertain angle range is reduced from ±0.5° to ±0.1°, the scanning and capturing time is reduced by more than several tens of times, and it is of great significance for laser communication link establishment between high-speed mobile platforms. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 is a schematic diagram of the laser communication terminal of the present application configured with microwave direction finding;

[0016] Figure 2 is a schematic diagram of microwave serpentine scanning of the present application;

[0017] Figure 3 is a schematic diagram of the microwave lateral guidance positioning work flow of the present application. DETAILED DESCRIPTION

[0018] Detailed implementation one: combined with Figures 1-3 Explain the present application;

[0019] Step one, set the scanning parameters of the first laser communication terminal and the second laser communication terminal;

[0020] Step two, the first laser communication terminal and the second laser communication terminal simultaneously transmit microwave signals;

[0021] Step three, the first laser communication terminal and the second laser communication terminal perform serpentine scanning to receive microwave signals; when the first laser communication terminal and the second laser communication terminal both detect the microwave signals, the microwave signals contain interactive information in the coding, and after the interactive signals are determined to be mutual terminals, rough alignment is performed;

[0022] The first laser communication terminal and the second laser communication terminal perform coarse alignment processing according to the received microwave signal, and coarse alignment is completed;

[0023] Step four, the first laser communication terminal and the second laser communication terminal after coarse alignment processing perform fine alignment processing, and the first laser communication terminal and the second laser communication terminal after fine alignment processing establish a laser communication link.

[0024] Specific implementation method two: the difference between this embodiment and the specific implementation method one is:

[0025] The first laser communication terminal and the second laser communication terminal in the step one are each provided with a coarse aiming device;

[0026] The coarse aiming device is installed with a microwave transceiving antenna and a laser transceiving antenna;

[0027] The scanning parameters of the first laser communication terminal and the second laser communication terminal include: microwave emission beam angle , microwave scanning interval, coarse aiming device rotation angular velocity , microwave signal threshold value , coarse aiming device rotation range, laser transceiving antenna field of view, microwave transceiving antenna field of view;

[0028] The preferred laser transceiving antenna field of view is 0.15°, and the coarse aiming device rotation range is: azimuth ±180°, pitch ±30°.

[0029] The preferred microwave transceiving antenna field of view is 20°, and the direction finding accuracy is better than 0.1°.

[0030] The field of view represents the angle range in which the laser communication terminal can effectively receive optical signals, which can be understood as the width of its “field of view” or “observation window”;

[0031] The microwave antenna and the laser communication terminal adapter plate have an installation accuracy better than 0.01°.

[0032] The microwave direction finding antenna and the laser communication terminal are coaxially installed through the adapter plate

[0033] Preferably, the scanning interval of the present application is 1 / 2 of the microwave beam angle ; the coarse aiming device rotation angular velocity is 0.1° / s

[0034] The other steps and parameters are the same as those in the specific implementation method one.

[0035] Specific implementation method three: the difference between this embodiment and the specific implementation methods one to two is:

[0036] The first laser communication terminal and the second laser communication terminal perform coarse alignment processing according to the received microwave signal, and coarse alignment is completed, and the specific process is as follows:

[0037] The first laser communication terminal and the second laser communication terminal perform coarse alignment processing according to the received microwave signal, and coarse alignment is completed; the specific process is as follows:

[0038] Step three one: the first laser communication terminal is taken as the main terminal, and the second laser communication terminal is taken as the passive terminal and fixed,

[0039] The first laser communication terminal performs serpentine scanning to receive the first microwave signal;

[0040] The specific process of the serpentine scanning is as follows:

[0041] According to the microwave amplitude width, the serpentine scanning range is set as ±90° in the azimuth (horizontal direction in the figure) and -5~60° in the pitch (vertical direction in the figure), and the microwave amplitude width refers to the width of the microwave antenna signal coverage range;

[0042] Each scanning is in the range of ±5°, until the signal relationship is established or the complete pointing range is scanned.

[0043] During the scanning process, if the microwave communication link cannot be established within 3 min, an alarm signal is fed back, the pointing range is reconfirmed, and then the scanning is restarted. The first microwave signal is subjected to amplitude direction finding processing to obtain a first direction finding angle; and the coarse aiming device of the first laser communication terminal is aligned to the first direction finding angle;

[0044] Step three two: the second laser communication terminal is taken as the main terminal, and the first laser communication terminal is taken as the passive terminal and fixed,

[0045] The second laser communication terminal performs serpentine scanning to receive the second microwave signal; the second microwave signal is subjected to amplitude direction finding processing to obtain a second direction finding angle; and the second laser communication terminal is aligned to the second direction finding angle;

[0046] Step three three: steps three one to three two are repeated, and when the first laser communication terminal and the second laser communication terminal both detect the strongest microwave signal strength, the process is stopped, and coarse alignment is completed.

[0047] The other steps and parameters are the same as those in one of the first to third specific embodiments.

[0048] The fourth specific embodiment is different from the first to third specific embodiments in that:

[0049] The specific process of the amplitude direction finding processing of the first microwave signal to obtain the first direction finding angle in step three one is as follows:

[0050] Step three one one: the amplitude of the first microwave signal is calculated;

[0051] Step three one two: according to the amplitude of the first microwave signal, the angle interval in which the amplitude of the first microwave signal exceeds the microwave signal threshold value is calculated

[0052] Step three one three: according to the angle interval of step three one two, the first direction finding angle is calculated

[0053] The other steps and parameters are the same as one of the first to third embodiments.

[0054] Embodiment five: the difference between this embodiment and the first to fourth embodiments is that:

[0055] In the step three one three, according to the angle interval of step three one two, the first direction finding angle is calculated, which is expressed by the formula:

[0056]

[0057] In the formula, θ1 represents the first direction finding angle; the other steps and parameters are the same as one of the first to fourth embodiments.

[0058] Embodiment six: the difference between this embodiment and the first to fifth embodiments is that:

[0059] In the step three two, the second microwave signal is processed by amplitude direction finding to obtain the second direction finding angle, and the specific process is:

[0060] Step three two one: the amplitude of the second microwave signal is calculated;

[0061] Step three two two: according to the amplitude of the second microwave signal, the angle interval in which the amplitude of the second microwave signal exceeds the microwave signal threshold value is calculated

[0062] Step three one three: according to the angle interval of step three one two, the second direction finding angle is calculated

[0063] The other steps and parameters are the same as one of the first to fifth embodiments.

[0064] Embodiment seven: the difference between this embodiment and the first to sixth embodiments is that:

[0065] In the step three one three, according to the angle interval of step three one two, the second direction finding angle is calculated, which is expressed by the formula:

[0066] ​​​​​​​​​

[0067] In the formula, The second direction-finding angle is represented; other steps and parameters are the same as one of embodiments one to six.

[0068] Embodiment eight: the difference between this embodiment and embodiments one to seven is that:

[0069] The first laser communication terminal and the second laser communication terminal after the rough alignment process in step four are subjected to fine alignment processing, and the first laser communication terminal and the second laser communication terminal after fine alignment processing establish a laser communication link, and the specific process is:

[0070] The first laser communication terminal and the second laser communication terminal simultaneously perform helical scanning within ±0.15°, until the spot signal is obtained to complete the laser communication terminal chain establishment. The first laser communication terminal and the second laser communication terminal simultaneously scan outward along the helical trajectory from the center within the respective ±0.15° uncertainty region. This is well known to those skilled in the art.

[0071] Other steps and parameters are the same as one of embodiments one to seven.

[0072] Embodiment nine: this embodiment is a computer storage medium, the storage medium stores at least one instruction, the at least one instruction is loaded and executed by the processor to realize the microwave chain direction finding guided laser communication chain establishment method.

[0073] It should be understood that the instructions include the computer program product, software or computerized method corresponding to any method described in the present application; the instructions can be used to program a computer system, or other electronic devices. The computer storage medium can include a readable medium having instructions stored thereon, which can include but not limited to magnetic storage medium, optical storage medium; magneto-optical storage medium includes read-only memory ROM, random access memory RAM, erasable programmable memory (such as EPROM and EEPROM) and flash memory layer, or other types of media suitable for storing electronic instructions other steps and parameters are the same as one of embodiments one to eight.

[0074] Embodiment ten: this embodiment is a microwave chain direction finding guided laser communication chain establishment device, the device includes a processor and a memory, it should be understood that any device described in the present application includes a processor and a memory, the device can also include other units, modules that display, interact, process, control, etc. through signals or instructions and other functions;

[0075] The memory stores at least one instruction, which is loaded and executed by the processor to implement the laser communication link establishment method based on microwave link measurement guidance.

[0076] Those skilled in the art will understand that at least one stored instruction constitutes a computer program product corresponding to a method or system. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. The solutions in the embodiments of this application can be implemented using various computer languages, such as the object-oriented programming language Java and the interpreted scripting language JavaScript.

[0077] This application is described with reference to flowchart illustrations and / or block diagrams of methods, systems, and computer program products according to embodiments of this application, and can also be used with corresponding devices. It should be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0078] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0079] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0080] The above description is merely of preferred embodiments of the present invention. It should be understood that the present invention is not limited to the specific embodiments described above. Although the present invention has been disclosed above with reference to preferred embodiments, it is not intended to limit the present invention. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present invention. Any simple modifications, equivalent substitutions, and improvements made to the above embodiments without departing from the scope of the present invention, based on the technical essence of the present invention, and within the spirit and principles of the present invention, shall still fall within the protection scope of the present invention.

Claims

1. A laser communication link establishment method based on microwave link measurement guidance, characterized in that, include: Step 1: Set the scanning parameters for the first laser communication terminal and the second laser communication terminal; Step 2: The first laser communication terminal and the second laser communication terminal simultaneously transmit microwave signals; Step 3: The first laser communication terminal and the second laser communication terminal perform a serpentine scan to receive microwave signals; when both the first laser communication terminal and the second laser communication terminal detect microwave signals; The first laser communication terminal and the second laser communication terminal perform coarse alignment processing based on the received microwave signals to complete the coarse alignment; Step 4: After coarse alignment, the first and second laser communication terminals undergo fine alignment. After fine alignment, the first and second laser communication terminals establish a laser communication link.

2. The laser communication link establishment method based on microwave link measurement guidance according to claim 1, characterized in that, In step one, both the first laser communication terminal and the second laser communication terminal are equipped with a coarse aiming device. The coarse aiming device is equipped with a microwave transceiver antenna and a laser transceiver antenna. The scanning parameters of the first laser communication terminal and the second laser communication terminal include: microwave emission beam angle. Microwave scanning interval, angular velocity of coarse aiming device Microwave signal threshold The range of rotation of the coarse aiming device, the field of view of the laser transceiver antenna, and the field of view of the microwave transceiver antenna.

3. The laser communication link establishment method based on microwave link measurement guidance according to claim 2, characterized in that, In step three, the first laser communication terminal and the second laser communication terminal perform coarse alignment processing based on the received microwave signal to complete the coarse alignment. The specific process is as follows: The first and second laser communication terminals perform coarse alignment processing based on the received microwave signals to complete the coarse alignment; the specific process is as follows: Step 31: Fix the first laser communication terminal as the master terminal and the second laser communication terminal as the passive terminal in a fixed position. The first laser communication terminal performs a serpentine scan to receive the first microwave signal; The first microwave signal is subjected to amplitude direction finding processing to obtain the first direction finding angle; the coarse aiming device of the first laser communication terminal is aligned with the first direction finding angle; Step 32: Fix the second laser communication terminal as the master terminal and the first laser communication terminal as the passive terminal. The second laser communication terminal performs a serpentine scan to receive the second microwave signal; it performs amplitude direction finding processing on the second microwave signal to obtain the second direction finding angle; and it aligns the second laser communication terminal with the second direction finding angle. Step 33: Repeat steps 31 to 32 until both the first and second laser communication terminals detect the strongest microwave signal intensity, then stop to complete the coarse alignment.

4. The laser communication link establishment method based on microwave link measurement guidance according to claim 3, characterized in that, In step three, the first microwave signal is subjected to amplitude direction finding processing to obtain the first direction finding angle. The specific process is as follows: Step 3: Calculate the amplitude of the first microwave signal; Step 312: Based on the amplitude of the first microwave signal, calculate whether the amplitude of the first microwave signal exceeds the microwave signal threshold. angular range , Step 313: Based on the angle range in Step 312 The first direction-finding angle is calculated.

5. The laser communication link establishment method based on microwave link measurement guidance according to claim 4, characterized in that, In step 313, the angle range is based on step 312. The first direction-finding angle is calculated and expressed by the formula: ， In the formula, This indicates the first direction-finding angle.

6. The laser communication link establishment method based on microwave link measurement guidance according to claim 5, characterized in that, In step three, the second microwave signal is subjected to amplitude direction finding processing to obtain the second direction finding angle. The specific process is as follows: Step 321: Calculate the amplitude of the second microwave signal; Step 322: Based on the amplitude of the second microwave signal, calculate whether the amplitude of the second microwave signal exceeds the microwave signal threshold. angular range , Step 313: Based on the angle range in Step 312 The second direction-finding angle is calculated.

7. The laser communication link establishment method based on microwave link measurement guidance according to claim 6, characterized in that, In step 313, the angle range is based on step 312. The second direction-finding angle is calculated and expressed by the formula: ， In the formula, This indicates the second direction-finding angle.

8. The laser communication link establishment method based on microwave link measurement guidance according to claim 7, characterized in that, In step four, the first and second laser communication terminals, after coarse alignment, undergo fine alignment. The first and second laser communication terminals, after fine alignment, then establish a laser communication link. The specific process is as follows: The first laser communication terminal and the second laser communication terminal simultaneously perform spiral scanning within a range of ±0.15° until a spot signal is acquired to complete the laser communication terminal link establishment.

9. A computer storage medium, characterized in that, The storage medium stores at least one instruction, which is loaded and executed by a processor to implement the laser communication link establishment method based on microwave link guidance as described in any one of claims 1 to 8.

10. A laser communication link establishment device based on microwave link detection guidance, characterized in that, The device includes a processor and a memory, the memory storing at least one instruction, which is loaded and executed by the processor to implement the laser communication link establishment method based on microwave link guidance as described in any one of claims 1 to 8.

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