Beam forming device, beam forming method and phased array laser terminal

Abstract

The invention discloses a beam forming device, a beam forming method and a phased array laser terminal.The beam forming device is characterized in that a controller firstly determines an optical path difference between a reference optical path and a target optical path and then determines compensation information representing delay time and a beam phase corresponding to the target optical path according to the optical path difference; and finally, the target first electro-optical modulator adjusts the code element delay time of the target optical path according to the compensation information, and the target first high-speed phase shifter adjusts the phase of the target optical path according to the compensation information, so that the code element delay time of the target optical path is adjusted through the first electro-optical modulator based on the optical path difference, and the target optical path is obtained. And the light beam phase of the target light path is adjusted through the first high-speed phase shifter, so that the phases of all paths of light paths can be consistent, true delay is obtained, optical phase jump can be reduced, the probability of instant interruption of communication can be reduced, and high-speed communication is further realized.

Description

Technical Field

[0001] The present invention relates to the field of satellite communication technologies, and particularly relates to a beamforming device, a beamforming method, and a phased array laser terminal. Background Art

[0002] With the development of satellite communication technologies, for beamforming of satellite laser communication terminals, beamforming is usually achieved by controlling the phase and amplitude of the antenna array of a phased array antenna.

[0003] During the process of phased array laser communication, according to the characteristics of optical phase periodicity, an optical phase shifter is used to compensate for the phase. This method may cause optical phase jumps due to the fixed optical path difference that is an integer multiple of the wavelength and the changing optical path difference caused by the movement of dual laser communication terminals, resulting in the problem of instant communication interruption. Summary of the Invention

[0004] The present invention provides a beamforming device, a beamforming method, and a phased array laser terminal to solve the problem of phase jumps existing in the prior art.

[0005] In a first aspect, an embodiment of the present application provides a beamforming device, including: a controller and multiple optical paths. Each optical path includes a first electro-optic modulator and a first high-speed phase shifter connected in sequence;

[0006] The controller is configured to determine the optical path difference between a reference optical path and a target optical path, where the reference optical path is the first optical path among the multiple optical paths, and the target optical path is the second optical path among the multiple optical paths; determine compensation information representing the delay time and the beam phase corresponding to the target optical path according to the optical path difference;

[0007] A target first electro-optic modulator is configured to adjust the symbol delay time of the target optical path according to the compensation information, where the target first electro-optic modulator is located on the target optical path;

[0008] A target first high-speed phase shifter is configured to adjust the phase of the beam of the target optical path according to the compensation information, where the target first high-speed phase shifter is located on the target optical path.

[0009] In a possible implementation manner, the controller is specifically configured to:

[0010] Calculate the ratio of the optical path difference to the speed of light;

[0011] Take the ratio of the ratio to the communication rate as the compensation information.

[0012] In a possible implementation manner, the controller is specifically configured to:

[0013] Determine the symbol control parameter based on the integer part of the compensation information, and determine the first phase control parameter based on the decimal part of the compensation information.

[0014] In one possible implementation, the target first electro-optic modulator is specifically configured to:

[0015] Adjust the symbol delay time of the target optical path to the target delay time according to the symbol control parameter.

[0016] In one possible implementation, the target first high-speed phase shifter is specifically configured to:

[0017] Adjust the phase of the target optical path to the target phase according to the symbol control parameter.

[0018] In one possible implementation, the device further includes: a beam combining device, and each optical path further includes a second high-speed phase shifter connected to the first high-speed phase shifter;

[0019] The combining device is configured to combine multiple beams adjusted by multiple second high-speed phase shifters into one beam to obtain a combined beam;

[0020] The controller is configured to use the stochastic parallel gradient algorithm to determine the second phase control parameter corresponding to each second high-speed phase shifter;

[0021] Each second high-speed phase shifter is configured to adjust the phase of the beam of each optical path according to each second phase control parameter so that the combined beam power of the combined beam is maximized.

[0022] In a second aspect, an embodiment of the present application provides a phased array laser terminal, including: an optical module, an optical fiber splitter, and a beam shaping device as described in any one of the first aspects, which are connected in sequence, and further includes a transmitting component corresponding to each optical path and connected to the beam shaping device;

[0023] The optical module is configured to emit laser light;

[0024] The optical fiber splitter is configured to divide the laser light into multiple beams;

[0025] The beam shaping device is configured to determine compensation information representing the delay time and the beam phase corresponding to the target optical path according to the optical path difference between the reference optical path and the target optical path, and based on the compensation information, adjust the symbol delay time of the target optical path, and, based on the compensation information, adjust the phase of the beam of the target optical path, where the reference optical path is the first optical path among multiple optical paths, and the target optical path is the second optical path among the multiple optical paths;

[0026] Each transmitting component is configured to transmit the beam adjusted by the beam shaping device to other phased array laser terminals.

[0027] In a possible implementation, it further includes a sampling module, a first fiber collimator corresponding to each optical path, and a second fiber collimator corresponding to each optical path;

[0028] For each optical path, the input end of the first fiber collimator is connected to the output end of the first high-speed phase shifter, the output end of the first fiber collimator is connected to the input end of the sampling module, the output end of the sampling module is connected to the input end of the second fiber collimator, and the output end of the second fiber collimator is connected to the input end of the second high-speed phase shifter.

[0029] In a third aspect, the present application further provides a beam shaping method, which is applied to the beam shaping device as described in any one of the first aspects or the phased array laser terminal as described in any one of the second aspects. The method includes:

[0030] Determine the optical path difference between the reference optical path and the target optical path, where the reference optical path is the first optical path among multiple optical paths, and the target optical path is the second optical path among the multiple optical paths;

[0031] Determine the compensation information representing the delay time and the beam phase corresponding to the target optical path according to the optical path difference;

[0032] Adjust the symbol delay time of the target optical path according to the compensation information, and adjust the phase of the beam of the target optical path according to the compensation information.

[0033] In a possible implementation, the determining the compensation information representing the delay time and the beam phase corresponding to the target optical path according to the optical path difference includes:

[0034] Calculate the ratio of the optical path difference to the speed of light;

[0035] Take the ratio of the ratio to the communication rate as the compensation information.

[0036] In a possible implementation, after determining the compensation information representing the delay time and the beam phase corresponding to the target optical path according to the optical path difference, it further includes:

[0037] Determine the symbol control parameter based on the integer part of the compensation information, and determine the first phase control parameter based on the decimal part of the compensation information

[0038] In a possible implementation, the adjusting the symbol delay time of the target optical path according to the compensation information includes:

[0039] Adjust the symbol delay time of the target optical path to a target delay time according to the symbol control parameter.

[0040] In a possible implementation manner, the adjusting the phase of the light beam of the target optical path according to the first phase control parameter includes:

[0041] Adjust the phase adjustment value of the target optical path to a target phase according to the first phase control parameter.

[0042] In a possible implementation manner, the method further includes:

[0043] Adopt a random parallel gradient algorithm to determine a second phase control parameter corresponding to each optical path;

[0044] Adjust the phase of the light beam of each optical path according to each second phase control parameter so that the combined beam power of the combined beam is maximized, where the combined beam is obtained by synthesizing a plurality of light beams in a plurality of optical paths into one light beam through a synthesizing device.

[0045] In a fourth aspect, the present application further provides a computer-readable storage medium storing computer instructions, which when run on a computer, cause the computer to execute the beamforming method according to any one of the third aspects.

[0046] The beneficial effects of the present invention are as follows:

[0047] A beamforming device, a beamforming method, and a phased array laser terminal provided by an embodiment of the present application. The controller first determines the optical path difference between the reference emission optical path and the target emission optical path, then determines the compensation information representing the delay time and the light beam phase corresponding to the target emission optical path according to the optical path difference, and finally adjusts the symbol delay time of the target optical path according to the compensation information through a first electro-optic modulator, and adjusts the phase of the target optical path according to the compensation information through a first high-speed phase shifter. Thus, based on the optical path difference, the symbol delay time of the target optical path is adjusted through the first electro-optic modulator, and the light beam phase of the target optical path is adjusted through the first high-speed phase shifter, so that the phases of each optical path can be made consistent, true delay can be obtained, optical phase jumps can be reduced, the probability of instantaneous communication interruption can be reduced, and high-speed communication can be realized. Description of the Drawings

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0049] Figure 1 Schematic structural diagram of a waveform shaping device provided by an embodiment of the present application;

[0050] Figure 2 Schematic structural diagram of a 4 - path optical path provided by an embodiment of the present application;

[0051] Figure 3 Schematic structural diagram of another beamforming device provided by an embodiment of the present application;

[0052] Figure 4 Schematic structural diagram of a phased - array laser terminal provided by an embodiment of the present application;

[0053] Figure 5 Schematic structural diagram of another phased - array laser terminal provided by an embodiment of the present application;

[0054] Figure 6 Schematic structural diagram of another phased - array laser terminal provided by an embodiment of the present application;

[0055] Figure 7 Schematic flowchart of a waveform shaping method provided by an embodiment of the present application. Detailed implementation manners

[0056] In order to make the objectives, technical solutions and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. 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] As Figure 1 shown, it is a schematic structural diagram of a waveform shaping device provided by an embodiment of the present application. It can be seen from Figure 1 that the beamforming device includes a controller 13 and a plurality of optical paths ( Figure 1 not shown in ). Each optical path includes a first electro - optic modulator 11 and a first high - speed phase shifter 12 connected in sequence. For each optical path, the light beam is input from the input end of the first electro - optic modulator 11 and output from the output end of the first high - speed phase shifter 12;

[0058] The controller 13 is configured to determine the optical path difference between a reference optical path and a target optical path, where the reference optical path is the first optical path among the plurality of optical paths, and the target optical path is the second optical path among the plurality of optical paths, and the first optical path and the second optical path are different; determine compensation information representing the delay time and the beam phase corresponding to the target optical path according to the optical path difference;

[0059] The target first electro-optic modulator 11 is configured to adjust the symbol delay time of the target optical path according to the compensation information;

[0060] The first high-speed phase shifter 12 is configured to adjust the phase of the light beam in the target optical path according to the compensation information.

[0061] In a beamforming device provided by an embodiment of the present application, the controller first determines the optical path difference between the reference optical path and the target optical path, then determines the compensation information characterizing the delay time and the light beam phase corresponding to the target optical path according to the optical path difference, and finally the target first electro-optic modulator adjusts the symbol delay time of the target optical path according to the compensation information, and the target first high-speed phase shifter adjusts the phase of the light beam in the target optical path according to the compensation information. Thus, based on the optical path difference, the symbol delay time of the target optical path is adjusted by the first electro-optic modulator, and the phase of the light beam in the target optical path is adjusted by the first high-speed phase shifter, so that the phases of all optical paths can be made consistent, true delay can be obtained, optical phase jumps can be reduced, the probability of communication interruption instantaneously can be reduced, and high-speed communication can be realized, thereby improving the communication capacity.

[0062] The embodiment of the present application can achieve true delay with large delay and high precision. By controlling the delay of the modulation signal, the integer period delay amount of the phase shifter for optical phase compensation in the analog control process is compensated, and high-speed communication is realized.

[0063] Figure 1 It includes n optical paths, where n is a positive integer greater than 1.

[0064] In the embodiment of the present application, after the controller determines the compensation information, it controls the target first electro-optic modulator and the target first high-speed phase shifter according to the compensation information. The target first electro-optic modulator adjusts the symbol delay time of the target optical path under the control of the controller, and the target first high-speed phase shifter adjusts the phase of the light beam in the target optical path under the control of the controller.

[0065] In a specific implementation, the optical path difference between the reference emission optical path and the target emission optical path is determined. Specifically, one optical path among the multiple optical paths is used as the reference optical path, and the other optical paths are used as target optical paths, and then for each target optical path, the optical path difference between the reference optical path and the target optical path is calculated.

[0066] For example, as Figure 2As shown, there are 4 laser beams, that is, 4 optical paths. One of the 4 optical paths can be used as the first optical path, which is also the reference optical path. One of the 4 optical paths other than the first optical path can be used as the second optical path, which is also the target optical path. For example, the controller 13 uses the first optical path as the reference optical path, and the second, third, and fourth optical paths as the target optical paths respectively, and then determines the optical path differences between the laser in the first optical path and the second optical path, between the laser in the first optical path and the third optical path, and between the laser in the first optical path and the fourth optical path; the controller 13 can also use the second optical path as the reference optical path, and the first, third, and fourth optical paths as the target optical paths respectively, and then determines the optical path differences between the laser in the first optical path and the second optical path, between the laser in the second optical path and the third optical path, and between the laser in the second optical path and the fourth optical path; the controller 13 can also use the third optical path as the reference optical path, and the first, second, and fourth optical paths as the target optical paths respectively, and then determines the optical path differences between the laser in the first optical path and the third optical path, between the laser in the second optical path and the third optical path, and between the laser in the third optical path and the fourth optical path.

[0067] Figure 2 In , if the first optical path is the reference optical path and the second optical path is the target optical path, then the first electro-optic modulator 2 is the target first electro-optic modulator, the first high-speed phase shifter 2 is the target first high-speed phase shifter. If the third optical path is the target optical path, then the first electro-optic modulator 3 is the target first electro-optic modulator, the first high-speed phase shifter 3 is the target first high-speed phase shifter. If the fourth optical path is the target optical path, then the first electro-optic modulator 4 is the target first electro-optic modulator, the first high-speed phase shifter 4 is the target first high-speed phase shifter.

[0068] After determining the optical path difference, the compensation information characterizing the delay time and the beam phase corresponding to the target optical path is determined according to the optical path difference. Specifically, the controller first calculates the delay time according to the optical path difference and the speed of light, and then takes the ratio of the calculated delay time to the communication rate as the compensation information.

[0069] The optical path difference between each optical path is Δ, and the delay time t can be expressed as:

[0070] t = Δ / c

[0071] Where, t is the delay time, Δ is the optical path difference, and c is the speed of light.

[0072] n = t / B

[0073] Where, n is the compensation information, t is the delay time, and B is the communication rate.

[0074] The n calculated by the above formula is the number of bits. In the embodiments of the present application, after calculating the compensation information, according to the integer part of the compensation information, the symbol control parameter is determined, and according to the decimal part of the compensation information, the first phase control parameter is determined. Then, the first electro-optic modulator controls the symbol delay time of the target optical path according to the symbol control parameter, and the first high-speed phase shifter controls the phase of the light beam of the target optical path according to the first phase control parameter.

[0075] In a specific implementation, according to the integer part of the delay compensation information, the first electro-optic modulator is used to control the symbol delay time of the target optical path. The symbol control parameter corresponding to the integer part of the compensation information can be determined from the correlation between the integer part and the symbol control parameter. Then, the controller 13 controls the target first electro-optic modulator according to the symbol control parameter, and the target first electro-optic modulator adjusts the symbol delay time of the target optical path to the target delay time.

[0076] For example, if the delay compensation information is 1.0245 bit, then in the correlation between the integer part and the symbol control parameter, the delay time corresponding to 1 is found to be 0.2 ms, that is, 0.2 ms is the symbol control parameter. The controller 13 controls the target first electro-optic modulator 11 according to the symbol control parameter of 0.2 ms, that is, the target first electro-optic modulator 11 adjusts the symbol delay time of the target optical path to the target delay time according to the symbol control parameter of 0.2 ms.

[0077] According to the decimal part of the delay compensation information, the first phase control parameter corresponding to the decimal part of the compensation information is determined in the correlation between the decimal part and the first phase control parameter. Then, the controller 13 controls the target second high-speed phase shifter 12 according to the first phase control parameter, that is, the target second high-speed phase shifter 12 modulates the phase of the target optical path to the target phase according to the first phase control parameter.

[0078] For example, if the compensation information is 1.0245 bit and the decimal part is 0.0245 bit, then the phase corresponding to 0.0245 bit is found to be 0.5 degrees in the correlation between the decimal part and the first phase control parameter, that is, 0.5 degrees is the first phase control parameter. The controller 13 controls the target first high-speed phase shifter 12 according to the first phase control parameter of 0.5 degrees, that is, the target second high-speed phase shifter 12 adjusts the phase of the target optical path to the target phase according to the first phase control parameter of 0.5 degrees.

[0079] In the embodiments of the present application, the association relationship between the integer part and the symbol control parameter may be a preset correspondence relationship between the integer part and the symbol delay time, or a proportional relationship between the integer part and the symbol control parameter; the association relationship between the fractional part and the first phase control parameter may be a preset correspondence relationship between the fractional part and the first phase control parameter, or a proportional relationship between the fractional part and the first phase control parameter.

[0080] In one embodiment, the controller 13 may apply a corresponding voltage to the target first high-speed phase shifter 12 according to the voltage value corresponding to 0.5 degrees, so as to control the phase of the target first high-speed phase shifter 12, and thus control the phase of the light beam of the target optical path.

[0081] As Figure 3 shown, it is a schematic structural diagram of another beamforming device provided by the embodiments of the present application. As Figure 3 can be seen, the embodiments of the present application may further include a beam combining device 14 and a second high-speed phase shifter 15 connected to each first high-speed phase shifter 12;

[0082] The beam combining device 14 is configured to combine a plurality of light beams adjusted by a plurality of second high-speed phase shifters 15 into one light beam to obtain a combined light beam;

[0083] The controller 13 is configured to determine a second phase control parameter corresponding to each second high-speed phase shifter by using a random parallel gradient algorithm;

[0084] Each second high-speed phase shifter 15 is configured to adjust the phase of the light beam of each optical path according to each second phase control parameter, so that the combined light power of the combined light beam is maximized.

[0085] In the embodiments of the present application, the phase shift amount of each second high-speed phase shifter in each path can be feedback-controlled by judging the change of the combined light power, so as to realize the phase synchronization of multiple channels in sequence, and finally obtain a convergence state, so that the combined light power reaches the maximum value and the phases of each path are consistent.

[0086] Based on the same inventive concept, the embodiments of the present application further provide a phased array laser terminal. The principle of solving problems by the phased array laser terminal is similar to the principle of solving problems by the beamforming device provided by the present application. The implementation of the phased array laser terminal can refer to the implementation of the beamforming device, and the repeated parts will not be described again.

[0087] As Figure 4 and Figure 5 shown, it is a phased array laser terminal provided by the embodiments of the present application. The phased array laser terminal includes an optical module 41, an optical fiber splitter 42, and a beamforming device 43 connected in sequence, and further includes a transmitting component 44 corresponding to each optical path;

[0088] The optical module 41 is configured to emit laser light;

[0089] The optical fiber splitter 42 is configured to split the laser into multiple beams of light.

[0090] The beam shaping device 43 is configured to determine compensation information representing a delay time and a beam phase corresponding to the target optical path according to the optical path difference between the reference optical path and the target optical path; adjust the symbol delay time of the target optical path according to the compensation information, and adjust the phase of the beam of the target optical path according to the compensation information, where the reference optical path is the first optical path among multiple optical paths, and the target optical path is the second optical path among multiple optical paths.

[0091] Each transmitting component 44 is configured to transmit the beam of light adjusted by the beam shaping device to other phased array laser terminals.

[0092] The functions of the optical module 41, the optical fiber splitter 42, and the transmitting component 44 in the embodiments of the present application are the same as those of the optical module, the optical fiber splitter, and the transmitting component in the phased array laser terminal provided in the related art, and will not be elaborated here.

[0093] In a specific implementation, the optical module 41 may include a light source and a second electro-optical modulator. The light source emits a beam of laser, and the laser passes through the second electro-optic modulator and is split into multiple beams of light by the optical fiber splitter 42.

[0094] In a specific implementation, the transmitting component 44 may include a telescope 441 and a scanner 442, as Figure 4 and Figure 5 shown.

[0095] As Figure 6 shown, it is a schematic structural diagram of another phased array laser terminal provided by the embodiments of the present application. It can be seen from Figure 6 that this phased array laser terminal further includes a sampling module 46, a first fiber collimator 47 corresponding to each optical path, and a second fiber collimator 48 corresponding to each optical path;

[0096] For each optical path, the input end of the first fiber collimator 47 is connected to the output end of the first high-speed phase shifter 12, the output end of the first fiber collimator 47 is connected to the input end of the sampling module 46, the output end of the sampling module 46 is connected to the input end of the second fiber collimator 48, and the output end of the second fiber collimator 48 is connected to the input end of the second high-speed phase shifter 15.

[0097] In the embodiments of the present application, the functions of the sampling module 46, the first fiber collimator 47, and the second fiber collimator 48 are the same as those of the sampling module and the fiber collimator provided in the related art, and will not be elaborated here.

[0098] It should be noted that the second high-speed phase shifter 15 in the embodiments of the present application can be a phase shifter in a phased array antenna in a phased array laser terminal.

[0099] In a specific implementation, the phased array laser terminal may further include a polarization controller, which makes the polarization of the light beam consistent. For specific implementation, reference can be made to the relevant technologies, and details are not elaborated in this application.

[0100] For the convenience of understanding, the present application will be described in detail below with specific embodiments.

[0101] Taking each array element aperture of 8 mm, interval of 10 mm, and scanning angle of 30° as an example. The seed source (light source) emits laser to the second electro-optic modulator. The communication data is controlled by the main control, and after being driven by radio frequency, it modulates the electro-optic modulator to load the data signal. The modulated laser signal is output as the communication transmission signal. Then, after passing through a 1×16 fiber splitter, a first electro-optic modulator is added to each branch in sequence for digital control. The polarization controller makes the polarization of the light beam consistent. 16 fiber collimators (first fiber collimators) collimate the fiber light into 16 spatial light beams. It is necessary to ensure the equal optical path of the 16 optical paths. The 16 spatial lights are optically sampled by the sampling module, and then after passing through a Fourier transform lens (not shown in the figure), they are coupled to the fiber at the back focal plane and received by a photodetector (not shown in the figure) to monitor the coherence of the 16 optical fields and ensure the phase synchronization of the transmitting front end.

[0102] The 16 synchronized spatial lights are coupled into the fiber again through the fiber collimator (second fiber collimator), and after passing through 16 fast small-travel fiber phase shifters (second high-speed phase shifters), they are collimated into spatial lights again and output by the telescope matrix (multiple telescopes). The size of each spatial light matches that of the MEMS two-dimensional scanning mirror (scanner), and after being reflected by the MEMS transmitting mirror (not shown in the figure), it is transmitted.

[0103] The phased array transceiver is coaxial. The received light is coupled to the telescope matrix through the MEMS mirror, and after passing through the fast small-travel fiber phase shifter and the polarization controller, it is collimated into 16 spatial light beams, which are optically sampled by the sampling module. The spatial lights with consistent polarization phases are coupled into the fiber again through the fiber collimator.

[0104] A large-travel fiber phase shifter (first high-speed phase shifter) and a small-travel fiber phase shifter (second high-speed phase shifter) are used in each fiber to independently control the phase of each channel, ensuring the phase synchronization between each array element (scanner). Then, it is connected to the receiving and demodulating module (not shown in the figure) to obtain the communication data.

[0105] When the communication rate is 5 Gbps and the optical path difference is 40.98 mm, the compensation information n = (40.98 mm * 5 Gbps) / (2 × 10 8m / s) = 1.0245 bit. Adjust the symbol delay time according to 1 bit and adjust the phase according to 0.0245 bit.

[0106] The second high-speed phase shifter is used to perform the Stochastic Parallel Gradient Descent (SPGD) algorithm on the monitored electrical signal. When performing gradient estimation, a perturbation voltage is simultaneously applied to all control variables of the system performance index. By judging the change in the combined beam power, feedback control is performed on the phase shift amount of each path, and the phase synchronization of multiple channels is achieved in sequence. Finally, a convergence state is obtained, the optical power reaches the maximum value, and the phases of all paths are consistent. The phases of the 16 optical signals always remain consistent to achieve multi-beam pointing coherent beam combination.

[0107] Based on the same inventive concept, the embodiment of the present application further provides a beamforming method. The principle of solving problems by this beamforming method is similar to that of the beamforming device provided by the present application. The implementation of the beamforming method can refer to the implementation of the beamforming device, and the repeated parts will not be elaborated.

[0108] As Figure 7 shown, it is a beamforming method provided by the embodiment of the present application. This beamforming method is applied to the beamforming device as described in any of the above or the phased array laser terminal as described in any of the above. The method includes the following steps:

[0109] S701. Determine the optical path difference between the reference optical path and the target optical path, where the reference optical path is the first optical path among multiple optical paths, and the target optical path is the second optical path;

[0110] S702. Determine the compensation information representing the delay time and the beam phase corresponding to the target optical path according to the optical path difference;

[0111] S703. Adjust the symbol delay time of the target optical path according to the compensation information, and adjust the phase of the beam of the target optical path according to the compensation information.

[0112] In a possible implementation manner, the determining the compensation information representing the delay time and the beam phase corresponding to the target optical path according to the optical path difference includes:

[0113] Calculate the ratio of the optical path difference to the speed of light;

[0114] Take the ratio of the ratio to the communication rate as the compensation information.

[0115] In a possible implementation manner, after determining the compensation information representing the delay time and the beam phase corresponding to the target optical path according to the optical path difference, it further includes:

[0116] Determine the symbol control parameter based on the integer part of the compensation information, and determine the first phase control parameter based on the decimal part of the compensation information.

[0117] In a possible implementation, the adjusting the symbol delay time of the target optical path according to the compensation information includes:

[0118] Adjust the symbol delay time of the target optical path to the target delay time according to the symbol control parameter.

[0119] In a possible implementation, the adjusting the phase of the light beam of the target optical path according to the first phase control parameter includes:

[0120] Adjust the phase adjustment value of the target optical path to the target phase according to the first phase control parameter.

[0121] In a possible implementation, the method further includes:

[0122] Adopt the random parallel gradient algorithm to determine the second phase control parameter corresponding to each optical path;

[0123] Adjust the phase of the light beam of each optical path according to each second phase control parameter to maximize the combined beam power of the combined beam, where the combined beam is obtained by synthesizing multiple light beams in multiple optical paths into one light beam through a synthesizing device.

[0124] The embodiment of the present application further provides a computer-readable storage medium, and the computer-readable storage medium stores computer instructions. When the computer instructions run on a computer, the computer is enabled to execute the beamforming method described in any one of the above.

[0125] The above describes the present application with reference to the block diagrams and / or flowcharts showing methods, apparatuses (systems) and / or computer program products according to embodiments of the present application. It should be understood that the functions / actions specified in the blocks of the block diagrams and / or flowcharts can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, and / or other programmable data processing devices to generate a machine, so that the instructions executed via the computer processor and / or other programmable data processing devices create a method for implementing the functions / actions specified in the blocks of the block diagrams and / or flowcharts.

[0126] Accordingly, the present application can also be implemented by hardware and / or software, including firmware, resident software, microcode, etc. Further, the present application can take the form of a computer program product on a computer-usable or computer-readable storage medium, having computer-usable or computer-readable program code embodied in the medium for use by or in connection with an instruction execution system. In the context of the present application, the computer-usable or computer-readable medium can be any medium that can contain, store, communicate, transmit, or transport the program for use by or in connection with the instruction execution system, apparatus, or device.

[0127] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalent technologies, the present invention is also intended to include these changes and modifications.

Claims

1. A beamforming device, characterized in that, Including: A controller and multiple optical paths. Each optical path includes a first electro-optic modulator and a first high-speed phase shifter connected in sequence. The controller is configured to determine the optical path difference between a reference optical path and a target optical path. The reference optical path is the first optical path among the multiple optical paths, and the target optical path is the second optical path among the multiple optical paths. Determine compensation information representing the delay time and the beam phase corresponding to the target optical path according to the optical path difference. The target first electro-optic modulator is configured to adjust the symbol delay time of the target optical path according to the compensation information, where the target first electro-optic modulator is located in the target optical path. The target first high-speed phase shifter is configured to adjust the phase of the beam of the target optical path according to the compensation information, and the target first high-speed phase shifter is located in the target optical path.

2. The device according to claim 1, characterized in that, Specifically, the controller is configured to: Calculate the ratio of the optical path difference to the speed of light. Use the ratio of the above ratio to the communication rate as the compensation information.

3. The device according to claim 2, characterized in that, Specifically, the controller is configured to: Determine the symbol control parameter based on the integer part of the compensation information, and determine the first phase control parameter based on the decimal part of the compensation information.

4. The device according to claim 3, characterized in that, Specifically, the target first electro-optic modulator is configured to: Adjust the symbol delay time of the target optical path to the target delay time according to the symbol control parameter.

5. The device according to claim 3, characterized in that, Specifically, the target first high-speed phase shifter is configured to: Adjust the phase of the target optical path to the target phase according to the first phase control parameter.

6. The device according to any one of claims 1 to 5, characterized in that, The device further includes: a beam combining device. Each optical path further includes a second high-speed phase shifter connected to the first high-speed phase shifter. The combining device is configured to combine the multiple beams adjusted by the multiple second high-speed phase shifters into one beam to obtain a combined beam. The controller is configured to use a stochastic parallel gradient algorithm to determine the second phase control parameter corresponding to each second high-speed phase shifter. Each second high-speed phase shifter is configured to adjust the phase of the beam of each optical path according to each second phase control parameter so that the combined power of the combined beam is maximized.

7. A phased array laser terminal, characterized in that Including: An optical module, an optical fiber splitter, and a beamforming device as described in any one of claims 1 to 6 connected in sequence. It further includes a transmitting component corresponding to each optical path and connected to the beamforming device. The optical module is configured to emit a laser. The optical fiber splitter is configured to divide the laser into multiple beams. The beamforming device is configured to determine the compensation information representing the delay time and the beam phase corresponding to the target optical path according to the optical path difference between the reference optical path and the target optical path. Based on the compensation information, adjust the symbol delay time of the target optical path, and based on the compensation information, adjust the phase of the beam of the target optical path. The reference optical path is the first optical path among the multiple optical paths, and the target optical path is the second optical path among the multiple optical paths. Each transmitting component is configured to transmit the beam adjusted by the beamforming device to other phased array laser terminals.

8. The terminal according to claim 7, wherein It further includes a sampling module, a first fiber collimator corresponding to each optical path, and a second fiber collimator corresponding to each optical path. For each optical path, the input end of the first fiber collimator is connected to the output end of the first high-speed phase shifter, the output end of the first fiber collimator is connected to the input end of the sampling module, the output end of the sampling module is connected to the input end of the second fiber collimator, and the output end of the second fiber collimator is connected to the input end of the second high-speed phase shifter.

9. A beamforming method, characterized in that, Applied to the beamforming device according to any one of claims 1 to 6, or applied to the phased array laser terminal according to claim 7, the method includes: Determine the optical path difference between the reference optical path and the target optical path, where the reference optical path is the first optical path among multiple optical paths, and the target optical path is the second optical path among the multiple optical paths; Determine the compensation information characterizing the delay time and the beam phase corresponding to the target optical path according to the optical path difference; Adjust the symbol delay time of the target optical path according to the compensation information, and adjust the phase of the beam of the target optical path according to the compensation information.

10. The method according to claim 9, wherein The determining the compensation information characterizing the delay time and the beam phase corresponding to the target optical path according to the optical path difference includes: Calculate the ratio of the optical path difference to the speed of light; Take the ratio of the ratio to the communication rate as the compensation information.

11. The method according to claim 10, wherein After determining the compensation information characterizing the delay time and the beam phase corresponding to the target optical path according to the optical path difference, it further includes: Determine the symbol control parameter based on the integer part of the compensation information, and determine the first phase control parameter based on the decimal part of the compensation information.

12. The method according to claim 11, wherein The adjusting the symbol delay time of the target optical path according to the compensation information includes: Adjust the symbol delay time of the target optical path to the target delay time according to the symbol control parameter.

13. The method according to claim 11, wherein The adjusting the phase of the beam of the target optical path according to the first phase control parameter includes: Adjust the phase adjustment value of the target optical path to the target phase according to the first phase control parameter.

14. The method according to any one of claims 9 to 13, characterized in that, The method further includes: Adopt the random parallel gradient algorithm to determine the second phase control parameter corresponding to each optical path; Adjust the phase of the beam of each optical path according to each second phase control parameter so that the combined beam power of the combined beam is the maximum, where the combined beam is obtained by synthesizing a plurality of beams in multiple optical paths into one beam through a synthesizing device.

15. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions, and when the computer instructions run on a computer, the computer is caused to execute the beamforming method according to any one of claims 9 to 14.

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