DBF digital beam forming system with free array function and design method thereof

Abstract

The application discloses a DBF digital beam synthesis system with a free group array function and a design method thereof, and belongs to the technical field of digital beam synthesis systems. The DBF digital beam synthesis system comprises a function branch module, a radio frequency transceiving module, a DBF processing module and a hundred G Ethernet switch, and the function branch module comprises a T / R transceiving array and a plurality of function branches. Communication connection among the modules is realized based on optical fiber communication through the setting of the hundred G Ethernet switch, which makes the data flow among the modules more flexible, thereby enabling the distributed deployment across physical cabinets to be realized, the constraint of a space scene is broken, and the system reconstruction instruction is acquired based on the hundred G Ethernet switch, flexible communication is completed in the form of software configuration, the logical recombination of the modules and the rapid reconstruction of the function branch module are realized, and a single hardware platform can execute a plurality of different tasks according to real-time task information on demand.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of digital beam synthesis systems, and particularly relates to a DBF digital beam synthesis system with a free array function and a design method thereof. BACKGROUND

[0002] In the design and implementation of a traditional large-scale active phased array system, the technical architecture mainly focuses on radio frequency transceiver modules, multi-stage digital beam synthesis (DBF) processing modules, and various functional units. These core components realize data interaction and collaborative work between modules through point-to-point high-speed transmission protocols (such as Aurora, JESD204B / C, etc.). Specifically, in the receiving path, the radio frequency processing module first digitizes the analog signals received by the antenna, and then directly connects the data to the primary DBF module through a pre-set fixed physical link. After the primary DBF module completes the amplitude and phase calibration and preliminary beam synthesis, the data is transmitted to the subsequent DBF module in the same rigid connection manner, and finally the final synthesized beam data is output by the last DBF module. The transmitting path adopts a symmetrical rigid connection architecture to ensure that the signal can be transmitted in reverse from the last DBF module to the radio frequency processing module according to the pre-set path, and finally radiated to space through the antenna. However, this point-to-point physical transmission-based technical architecture leads to significant physical layer tight coupling characteristics of the system, which forces all modules to be deployed in the same cabinet. This limitation is particularly prominent in space-sensitive scenarios such as airborne and satellite systems, as the system often cannot meet the actual deployment requirements due to the problem of exceeding the physical volume. More seriously, this tight coupling architecture also causes some serious systemic defects: first, the data transmission path is highly bound to the hardware, and the system loses the flexibility to dynamically configure data flow according to task requirements, making it difficult to adapt to complex and changing environments; second, only the pre-set point-to-point routing is supported between modules, and free communication modes such as broadcasting and multicasting cannot be realized, limiting the expansion and upgrade of system functions.

[0003] As described above, how to provide a DBF digital beam synthesis system with a free array function and a design method thereof that enables flexible data flow between modules and allows free communication has become a problem to be solved in the field. SUMMARY

[0004] The purpose of the present application is to provide a DBF digital beam synthesis system with a free array function and a design method thereof to solve the above problems existing in the prior art.

[0005] In order to achieve the above purpose, the technical scheme adopted by the present application is as follows:

[0006] In a first aspect, the present application provides a DBF digital beam synthesis system with free array function, which comprises a function branch module, a radio frequency transceiver module, a DBF processing module, a management and maintenance terminal and a hundred G Ethernet switch, and the function branch module comprises a T / R transceiver array and a plurality of function branches.

[0007] The T / R transceiver array in the function branch module is configured to acquire external radio frequency signals and process the external radio frequency signals to form analog signals, and each function branch in the function branch module is configured to receive digital beam data sent by the hundred G Ethernet switch and execute an upper-layer application task corresponding to the digital beam data.

[0008] The radio frequency transceiver module is configured to receive analog signals sent by the T / R transceiver array, generate corresponding digital signals, and send the digital signals to the hundred G Ethernet switch.

[0009] The DBF processing module is configured to receive digital signals sent by the hundred G Ethernet switch, perform synchronization processing on the digital signals, complete amplitude and phase calibration and beam synthesis, generate digital beam data, and send the digital beam data to the hundred G Ethernet switch.

[0010] The management and maintenance terminal is configured to acquire task information from the outside, generate a corresponding real-time IP routing strategy according to the task information, and generate a system reconstruction instruction according to the real-time IP routing strategy.

[0011] The hundred G Ethernet switch is configured to exchange data with the function branch module, the radio frequency transceiver module and the DBF processing module, and is further configured to acquire the system reconstruction instruction from the management and maintenance terminal and forward the system reconstruction instruction to the radio frequency transceiver module.

[0012] The radio frequency transceiver module is further configured to receive the system reconstruction instruction sent by the hundred G Ethernet switch and send a subarray reconstruction signal to the T / R transceiver array.

[0013] The function branch module is further configured to perform module reconstruction according to the received subarray reconstruction signal to obtain a reconstructed array.

[0014] In a possible design, the T / R transceiver array comprises a plurality of function branch subarrays, each of which corresponds to a function branch, and each of the function branch subarrays comprises a plurality of array elements, each of which is a T / R component.

[0015] Each of the array elements corresponds to an array element IP address, each of the function extensions corresponds to at least one array element IP address, each array element corresponding to each of the function extensions is a function extension subarray of each of the function extensions, and an IP address segment of each of the function extension subarrays is composed of each array element corresponding to each of the function extension subarrays;

[0016] Each of the function extensions corresponds to a destination IP address, and the destination IP address of each of the function extensions corresponds to the IP address segment of each of the function extension subarrays.

[0017] In a possible design, each of the function extensions in the function extension module is configured to execute a different upper-layer application task.

[0018] The upper-layer application tasks include a radar detection task, a target identification task, a target tracking task, an electronic countermeasure task, and / or an information communication task.

[0019] In a possible design, the number of the radio frequency transceiver modules is multiple, and the number of the DBF processing modules is multiple.

[0020] Each of the radio frequency transceiver modules is in communication connection with the T / R transceiving array, and each of the radio frequency transceiver modules is in one-to-one correspondence with one of the DBF processing modules.

[0021] In a possible design, the DBF processing modules include a primary DBF processing module, a secondary DBF processing module, and a final DBF processing module.

[0022] The primary DBF processing module is in communication connection with the T / R transceiving array, configured to receive an analog signal transmitted by the T / R transceiving array, perform time synchronization processing and amplitude and phase calibration processing on the analog signal, perform primary beam synthesis on the analog signal after the processing, generate primary beam data, and transmit the primary beam data to the hundred-Gigabit Ethernet switch to implement primary beam data forwarding.

[0023] The secondary DBF processing module is in communication connection with the hundred-Gigabit Ethernet switch, configured to receive the primary beam data forwarded by the hundred-Gigabit Ethernet switch, perform secondary calibration and secondary beam synthesis on the primary beam data, generate secondary beam data, and transmit the secondary beam data to the hundred-Gigabit Ethernet switch to implement secondary beam data forwarding, where the secondary beam data is a wide beam.

[0024] The last-stage DBF processing module is in communication connection with the hundred-G Ethernet switch, and is configured to receive secondary beam data forwarded by the hundred-G Ethernet switch, perform last-stage beam synthesis on the secondary beam data to generate at least one digital beam data, and send the digital beam data to the hundred-G Ethernet switch to forward the digital beam data to each of the function extensions, where each of the digital beam data corresponds to one of the upper-layer application tasks.

[0025] In a possible design, the apparatus further includes a fault detection module configured to detect whether the DBF processing module is faulty.

[0026] The DBF processing module further includes a plurality of backup DBF processing modules, the fault detection module is in communication connection with the hundred-G Ethernet switch, and when it is detected that the DBF processing module is faulty, the fault detection module generates and sends fault module information to the hundred-G Ethernet switch, and the hundred-G Ethernet switch forwards the fault module information to the management and maintenance terminal.

[0027] The management and maintenance terminal is configured to receive the fault module information, generate real-time IP routing strategies according to the fault module information, and send the real-time IP routing strategies to the hundred-G Ethernet switch, and the hundred-G Ethernet switch broadcasts the real-time IP routing strategies to complete fault elimination.

[0028] In a possible design, the hundred-G Ethernet switch is in communication connection with the function extension module, the radio frequency transceiver module, and the DBF processing module through an RDMA interface based on a hundred-G Ethernet RDMA networking communication protocol.

[0029] In a possible design, the function extension module, the radio frequency transceiver module, and the DBF processing module each include an FPGA unit and an electro-optical conversion unit.

[0030] The function extension module, the radio frequency transceiver module, and the DBF processing module send electrical signals conforming to the hundred-G Ethernet RDMA networking communication protocol to the electro-optical conversion unit through the FPGA units, and the electro-optical conversion unit is configured to convert the received electrical signals into optical signals and send the optical signals to the hundred-G Ethernet switch through the RDMA interface.

[0031] The function extension module, the radio frequency transceiver module, and the DBF processing module convert optical signals received from the hundred-G Ethernet switch into electrical signals through the electro-optical conversion unit, and send the electrical signals converted from the optical signals to the FPGA units, and the FPGA units are configured to receive the electrical signals to complete work.

[0032] In a possible design, the management and maintenance terminal stores an original IP routing strategy;

[0033] The original IP routing strategy is a correspondence relationship among a destination IP address of each functional extension, an IP address segment of each functional extension subarray, and a destination IP address of each functional extension and an IP address segment of each functional extension subarray, the management and maintenance terminal is configured to generate a real-time IP routing strategy according to the task information, compare the real-time IP routing strategy with the original IP routing strategy, generate a system reconstruction instruction, and send the system reconstruction instruction to the hundred-G Ethernet switch.

[0034] In a second aspect, the present application provides a design method of a DBF digital beam synthesis system with a free array function, which is used to design the DBF digital beam synthesis system with the free array function as described in the first aspect or any possible design of the first aspect, and includes the following steps:

[0035] Functional extension modules, radio frequency transceiver modules, DBF processing modules, and a hundred-G Ethernet switch are arranged in the system to serve as basic system hardware, and a basic system hardware architecture is established, wherein each of the basic system hardware includes an FPGA unit, and the functional extension module includes a T / R transceiver array and a plurality of functional extensions.

[0036] The FPGA unit in each of the basic system hardware is arranged with a hundred-G Ethernet RDMA networkable communication protocol, and the FPGA unit in each of the basic system hardware is arranged with an RDMA interface.

[0037] The RDMA interface of each of the basic system hardware is used to communicatively connect each of the basic system hardware with the hundred-G Ethernet switch, and the T / R transceiver array is communicatively connected with the radio frequency transceiver module, so as to construct an IP network communication architecture.

[0038] The hundred-G Ethernet switch and a management and maintenance terminal are communicatively connected, and an original IP routing strategy stored in the management and maintenance terminal is broadcasted to the basic system hardware architecture through the IP network communication architecture, so as to allocate the original IP routing strategy to each of the basic system hardware, and complete the initial design of the DBF digital beam synthesis system with the free array function.

[0039] On the basis of completing the initial design of the DBF digital beam synthesis system with the free group array function, the system reconfiguration instruction sent by the management and maintenance terminal is acquired through the hundred G Ethernet switch, and the system reconfiguration instruction is sent to the radio frequency transceiver module to reconfigure the function extension module, so as to complete the final design of the DBF digital beam synthesis system with the free group array function.

[0040] Beneficial effects: the present application provides a DBF digital beam synthesis system with a free group array function and a design method thereof, which comprises a function extension module, a radio frequency transceiver module, a DBF processing module, a management and maintenance terminal and a hundred G Ethernet switch, and the function extension module comprises a T / R transceiver array and a plurality of function extensions; wherein the T / R transceiver array in the function extension module is used to acquire external radio frequency signals and process the external radio frequency signals to form analog signals, each function extension in the function extension module is used to receive digital beam data sent by the hundred G Ethernet switch and execute upper layer application tasks corresponding to the digital beam data; the radio frequency transceiver module is used to receive analog signals sent by the T / R transceiver array, generate corresponding digital signals and send the digital signals to the hundred G Ethernet switch; the DBF processing module is used to receive digital signals sent by the hundred G Ethernet switch, perform synchronous processing on the digital signals, complete amplitude and phase calibration and beam synthesis to generate digital beam data and send the digital beam data to the hundred G Ethernet switch; the management and maintenance terminal is used to acquire task information from the outside, generate corresponding real-time IP routing strategies according to the task information to generate system reconfiguration instructions according to the real-time IP routing strategies; the hundred G Ethernet switch is used for data exchange with the function extension module, the radio frequency transceiver module and the DBF processing module, and is also used for acquiring the system reconfiguration instructions from the management and maintenance terminal and forwarding the system reconfiguration instructions to the radio frequency transceiver module; the radio frequency transceiver module is also used to receive the system reconfiguration instructions sent by the hundred G Ethernet switch to send subarray reconfiguration signals to the T / R transceiver array; the function extension module is also used to reconfigure the modules according to the received subarray reconfiguration signals to obtain a reconfigured array. Through the setting of the hundred G Ethernet switch, communication connection between each module is realized based on optical fiber communication, which makes the data flow between each module more flexible, so that distributed deployment across physical cabinets is realized, the constraint of the space scene is broken, and based on the hundred G Ethernet switch, the system reconfiguration instruction is acquired to complete flexible communication in the form of software configuration, realize logical recombination of each module and rapid reconfiguration of the function extension module, so as to realize on-demand execution of a plurality of different tasks according to real-time task information on a single hardware platform. BRIEF DESCRIPTION OF DRAWINGS

[0041] Figure 1A function structure schematic diagram of the DBF digital beam synthesis system with the free group array function provided by the embodiment of the present application is provided.

[0042] Figure 2 A communication structure schematic diagram of the DBF digital beam synthesis system with the free group array function provided by the embodiment of the present application is provided.

[0043] Figure 3 A communication structure schematic diagram of the DBF digital beam synthesis system with the free group array function provided by the embodiment of the present application is provided.

[0044] Figure 4 A communication structure schematic diagram of the DBF digital beam synthesis system with the free group array function provided by the embodiment of the present application is provided.

[0045] Figure 5 A hardware topology structure schematic diagram of the DBF digital beam synthesis system with the free group array function provided by the embodiment of the present application is provided.

[0046] Figure 6 A step flow schematic diagram of the design method of the DBF digital beam synthesis system with the free group array function provided by the embodiment of the present application is provided. DETAILED DESCRIPTION

[0047] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the present application will be briefly introduced with reference to the drawings and the description of the embodiments or the prior art. Obviously, the following description of the drawings structure is only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor. It should be noted that the description of these embodiment modes is used to help understand the present application, but does not constitute a limitation on the present application.

[0048] It should be understood that although the terms first, second, etc. may be used herein to describe various elements, these elements should not be limited by these terms. These terms are only used to distinguish one element from another element. For example, a first element can be called a second element, and similarly a second element can be called a first element without departing from the scope of the example embodiments of the present application.

[0049] It should be understood that, for the term "and / or" which can occur in the present text, it is only a description of the association relationship of the associated objects, which means that there can be three relationships, for example, A and / or B, which can represent: the existence of A alone, the existence of B alone, and the existence of A and B at the same time; for the term " / and" which can occur in the present text, it is another description of the association relationship of another associated object, which means that there can be two relationships, for example, A / and B, which can represent: the existence of A alone, and the existence of A and B; in addition, for the character " / " which can occur in the present text, it generally represents an "or" relationship between the associated objects before and after it.

[0050] Embodiments:

[0051] As Figure 1 shown, the first aspect of the present embodiment provides a DBF digital beam synthesis system with free array forming function, wherein the DBF digital beam synthesis system with free array forming function comprises a function sub-module, a radio frequency transceiver module, a DBF processing module, a management and maintenance terminal and a hundred G Ethernet switch, and the function sub-module comprises a T / R transceiver array and a plurality of function sub-modules.

[0052] The T / R transceiver array in the function sub-module is configured to obtain external radio frequency signals and process the external radio frequency signals to form analog signals, and each function sub-module in the function sub-module is configured to receive digital beam data sent by the hundred G Ethernet switch and execute an upper-layer application task corresponding to the digital beam data.

[0053] The radio frequency transceiver module is configured to receive analog signals sent by the T / R transceiver array, generate corresponding digital signals, and send the digital signals to the hundred G Ethernet switch.

[0054] The DBF processing module is configured to receive digital signals sent by the hundred G Ethernet switch, perform synchronization processing on the digital signals, complete amplitude and phase calibration and beam synthesis, generate digital beam data, and send the digital beam data to the hundred G Ethernet switch.

[0055] The management and maintenance terminal is configured to obtain task information from the outside, generate a corresponding real-time IP routing strategy according to the task information, and generate a system reconstruction instruction according to the real-time IP routing strategy.

[0056] The hundred G Ethernet switch is configured to exchange data with the function sub-module, the radio frequency transceiver module and the DBF processing module, and is further configured to obtain the system reconstruction instruction from the management and maintenance terminal and forward the system reconstruction instruction to the radio frequency transceiver module.

[0057] The radio frequency transceiver module is further configured to receive the system reconfiguration instruction sent by the hundred-G Ethernet switch, and send a subarray reconfiguration signal to the T / R transceiver array.

[0058] The function extension module is further configured to perform module reconfiguration according to the received subarray reconfiguration signal, to obtain a reconfigured array.

[0059] It should be noted that in a conventional large-scale active phased array system, the architecture composed of a radio frequency transceiver module, a multi-stage DBF processing module and a function extension module adopts a point-to-point high-speed transmission protocol (Aurora or JESD204B / C) to realize point-to-point direct connection of data interaction between modules, which requires that in the specific implementation, each module needs to be deployed in a common cabinet. However, in the specific implementation scene of the digital beam synthesis system technology, it is often difficult to complete the deployment and implementation due to the limited space of the system bearing equipment. Therefore, the embodiment re-forms a fiber communication architecture by using the hundred-G Ethernet switch and the hundred-G Ethernet RDMA network communication protocol, to realize the communication connection between each module.

[0060] The hundred-G Ethernet switch provided in the embodiment is a fast Ethernet switch for hundred-M and thousand-M Ethernet switching, and the transmission rate thereof is more than 100 gigabits per second, covering 200-gigabit Ethernet (200G), 400-gigabit Ethernet (400G) and higher speed specifications.

[0061] As Figure 2As shown, the specific architecture of the information receiving communication of the system provided in this embodiment is that: the radio frequency signal receiving end of the T / R transceiving array is configured to receive external radio frequency signals, the analog signal sending end of the T / R transceiving array is communicatively connected to the analog signal receiving end of the radio frequency transceiver module, the digital signal sending end of the radio frequency transceiver module is communicatively connected to the digital signal receiving end of the hundred-G Ethernet switch, the digital signal sending end of the hundred-G Ethernet switch is communicatively connected to the digital signal receiving end of the DBF processing module, the digital beam data sending end of the DBF processing module is communicatively connected to the digital beam data receiving end of the hundred-G Ethernet switch, and the digital beam data sending end of the hundred-G Ethernet switch is communicatively connected to a plurality of the functional extensions. Through the hundred-G Ethernet switch, information broadcasting and / or multicasting is achieved. This makes it possible to support distributed deployment across physical cabinets, especially when dealing with small equipment spaces, the system provided in this embodiment breaks through the space constraints and can be distributedly deployed on multiple adjacent or nearby devices to maintain normal communication and information processing. This is because airborne and shipborne scenarios often have compact platforms, and the optical link transmission distance of the optical fiber communication mode of the hundred-G Ethernet switch is generally not less than 100m. Therefore, the system provided in this embodiment is particularly suitable for being built in airborne and shipborne scenarios where traditional large-scale active phased array systems are not suitable for building, realizing flexible data flow and communication, greatly improving the application range of the digital beam synthesis system, and improving its functionality and adaptability.

[0062] In addition, since the connection mode of each hardware module in the traditional large-scale active phased array system is fixed, if it is necessary to expand or shrink the system according to actual needs, physical reconstruction such as system disassembly and reconstruction is required, which obviously cannot deal with emergency or unexpected situations in actual application, especially in the application scenario of electronic countermeasures. This problem will make the system unable to perform tasks and complete communication in a timely manner as needed. Therefore, the system provided in this embodiment proposes to generate an IP routing strategy in the hundred-G Ethernet switch based on the above hardware and communication architecture, and to allocate IP routing strategies (software configurations) to each of the basic system hardware in the basic system hardware architecture based on the hundred-G Ethernet RDMA networkable communication protocol through the IP network communication architecture, and to realize the logical reorganization of each module through the software configuration of the IP routing strategy (without any hardware modification).

[0063] In a possible implementation, the T / R transceiving array includes a plurality of functional extension sub-arrays, each of the functional extension sub-arrays corresponds to one of the functional extensions, and each of the functional extension sub-arrays includes a plurality of array elements, each of the array elements being a T / R component.

[0064] Each of the array elements corresponds to an array element IP address, each of the function extensions corresponds to at least one array element IP address, each array element corresponding to each of the function extensions is taken as a function extension subarray of each function extension, and an IP address segment of each function extension subarray is composed of each array element corresponding to each of the function extension subarrays.

[0065] Each of the function extensions corresponds to a destination IP address, and the destination IP address of each function extension corresponds to the IP address segment of each function extension subarray one by one.

[0066] The T / R array (Transmit / Receive Array) is composed of a plurality of T / R modules (Transmit / Receive Module), each of which is used to realize the functions of transmitting signal amplification, receiving signal amplification, signal amplitude control and signal phase control. In this embodiment, a plurality of subarrays (virtual subarrays) are defined in the T / R array by software configuration, and the IP address segment of each subarray corresponds to the IP address of the function extension one by one, which enables each subarray to accurately correspond to one upper-layer application task. In the alternative case, this enables a single hardware platform to simultaneously perform radar detection, information communication and electronic countermeasures and other tasks, greatly improving the working capacity of the system.

[0067] As shown in Figure 3 , in a possible implementation scenario, in a DBF system with 192 array elements, there are four function extensions (function extension 1, function extension 2, function extension 3 and function extension 4) in the back end, each of which is used to complete different upper-layer application tasks. In the original mode as shown in Figure 3 , the four function extensions are each allocated 48 array elements to form function extension subarrays (i.e., function extension 1 array element distribution, function extension 2 array element distribution, function extension 3 array element distribution and function extension 4 array element distribution).

[0068] The 48 array element data received by each function extension subarray is in accordance with the IP routing strategy of the original mode stored in the hundred-G Ethernet switch (i.e., the hundred-G switch in Figure 3 ), the IP address segment of the array element data received by the function extension 1 array element distribution is 000.000.1.1-000.000.1.48, the IP address segment of the array element data received by the function extension 2 array element distribution is 000.000.1.49-000.000.1.96, the IP address segment of the array element data received by the function extension 3 array element distribution is 000.000.1.97-000.000.1.144, and the IP address segment of the array element data received by the function extension 4 array element distribution is 000.000.1.145-000.000.1.192.

[0069] The destination IP address of the function extension 1 is 000.000.1.193, the destination IP address of the function extension 2 is 000.000.1.194, the destination IP address of the function extension 3 is 000.000.1.195, and the destination IP address of the function extension 4 is 000.000.1.196.

[0070] In the original mode, the sending destination address of data of the array element with the IP address in the range of 000.000.1.1-000.000.1.48 is the destination IP address 000.000.1.193 of the function extension 1, the sending destination address of data of the array element with the IP address in the range of 000.000.1.49-000.000.1.96 is the destination IP address 000.000.1.194 of the function extension 2, the sending destination address of data of the array element with the IP address in the range of 000.000.1.97-000.000.1.144 is the destination IP address 000.000.1.195 of the function extension 3, and the sending destination address of data of the array element with the IP address in the range of 000.000.1.145-000.000.1.192 is the destination IP address 000.000.1.196 of the function extension 4.

[0071] As shown in the communication architecture of the reconstruction mode in Figure 4 When the system provided by the embodiment needs to adjust the array element scale of a single function extension, real-time IP routing strategies need to be generated according to actual needs, and the system reconstruction instruction is obtained through the hundred-G Ethernet switch (i.e., the hundred-G switch in Figure 4 After the system reconstruction, the function extension 1 and the function extension 2 each use 96 array elements, and the function extension 3 and the function extension 4 are not used. At this time, the data routing relationship of the corresponding array element is reconfigured through the hundred-G Ethernet switch to the corresponding radio frequency transceiver module of 192 array elements. The modified configuration is as follows: the IP address segment of the function extension 1 array element for receiving array element data is 000.000.1.1-000.000.1.96, the IP address segment of the function extension 2 array element for receiving array element data is 000.000.1.49-000.000.1.192, the destination IP address of the function extension 1 is 000.000.1.193, the destination IP address of the function extension 2 is 000.000.1.194, the sending destination address of data of the array element with the IP address in the range of 000.000.1.1-000.000.1.96 is the destination IP address 000.000.1.193 of the function extension 1, and the sending destination address of data of the array element with the IP address in the range of 000.000.1.97-000.000.1.192 is the destination IP address 000.000.1.194 of the function extension 2.

[0072] The system provided by the embodiment can reconfigure the IP address routing relationship through software without modifying the hardware communication link, thereby quickly completing the system reconstruction.

[0073] In a possible implementation, each of the function extension modules is configured to execute a different upper-layer application task.

[0074] The upper-layer application task includes a radar detection task, a target identification task, a target tracking task, an electronic countermeasure task, and / or an information communication task.

[0075] In a possible implementation, the number of the radio frequency transceiver modules is plural, and the number of the DBF processing modules is plural.

[0076] Each of the radio frequency transceiver modules is in communication connection with the T / R transceiving array, and each of the radio frequency transceiver modules is in one-to-one communication connection with one of the DBF processing modules.

[0077] In a possible implementation, the DBF processing module includes a primary DBF processing module, a secondary DBF processing module, and a final DBF processing module.

[0078] The primary DBF processing module is in communication connection with the T / R transceiving array, configured to receive an analog signal transmitted by the T / R transceiving array, perform time synchronization processing and amplitude and phase calibration processing on the analog signal, perform primary beam synthesis on the analog signal after the processing, generate primary beam data, and transmit the primary beam data to the hundred-G Ethernet switch to implement primary beam data forwarding.

[0079] The secondary DBF processing module is in communication connection with the hundred-G Ethernet switch, configured to receive the primary beam data forwarded by the hundred-G Ethernet switch, perform secondary calibration and secondary beam synthesis on the primary beam data, generate secondary beam data, and transmit the secondary beam data to the hundred-G Ethernet switch to implement secondary beam data forwarding, wherein the secondary beam data is a wide beam.

[0080] The final DBF processing module is in communication connection with the hundred-G Ethernet switch, configured to receive the secondary beam data forwarded by the hundred-G Ethernet switch, perform final beam synthesis on the secondary beam data, generate at least one digital beam data, and transmit the digital beam data to the hundred-G Ethernet switch to forward the digital beam data to each of the function extension modules, wherein each of the digital beam data corresponds to one of the upper-layer application tasks.

[0081] In a possible implementation, a fault detection module is further included, configured to detect whether the DBF processing module is faulty;

[0082] The DBF processing module further includes a plurality of backup DBF processing modules, the fault detection module is in communication connection with the hundred G Ethernet switch, when detecting that the DBF processing module is faulty, the fault detection module generates and sends fault module information to the hundred G Ethernet switch, and the hundred G Ethernet switch forwards the fault module information to the management and maintenance terminal;

[0083] The management and maintenance terminal is configured to receive the fault module information, generate real-time IP routing strategy according to the fault module information, and send the real-time IP routing strategy to the hundred G Ethernet switch, and the hundred G Ethernet switch broadcasts the real-time IP routing strategy to complete fault elimination.

[0084] It should be noted that the existing large-scale active phased array system lacks software-level fault-tolerant mechanism due to its point-to-point communication mode and hardware setting architecture, which leads to performance deterioration of the entire system and even system paralysis once a single-point fault of a module occurs. In addition, the normal function of the system can be restored only by replacing the faulty hardware to repair the system, which obviously prolongs the average repair time of the system and seriously affects the reliability and availability of the system. Therefore, in the system provided in the embodiment, the hardware configurations of the primary DBF processing modules, the secondary DBF processing modules and the tertiary DBF processing modules are completely the same, the DBF processing modules are all connected in communication with the hundred-Gigabit Ethernet switch through the RDMA interface, and in a possible but not limited implementation manner, a plurality of standby modules (in a specific implementation manner, 16 primary DBF processing modules are provided, and 2 standby DBF processing modules can be set) are reserved for the DBF processing modules. When the fault detection module detects a single-point fault of one of the 16 primary DBF processing modules in the original system architecture (i.e., it is found that a certain primary DBF processing module has no data transmission), the fault module information can be generated and sent to the hundred-Gigabit Ethernet switch, the hundred-Gigabit Ethernet switch sends the fault module information to the management and maintenance terminal, the management and maintenance terminal analyzes the received fault module information to generate a real-time IP routing strategy, compares the real-time IP routing strategy with the IP routing strategy, generates a system reconstruction instruction, and returns the system reconstruction instruction to the hundred-Gigabit Ethernet switch. The hundred-Gigabit Ethernet switch broadcasts the system reconstruction instruction, and the DBF processing module divides one of the 2 standby DBF processing modules into the 16 primary DBF processing modules in operation, and at the same time, the corresponding faulty primary DBF processing module is removed to form a new system architecture, and the fault removal is completed.

[0085] The system reconstruction method for real-time detection and real-time module configuration through software can repair a single-point fault without modifying the system hardware and communication connection relationship, avoid performance deterioration and / or system paralysis of the entire system, effectively enhance the fault-tolerant capability of the system, and greatly shorten the average fault repair time of the system.

[0086] In a possible implementation manner, the hundred-Gigabit Ethernet switch is connected in communication with the function extension module, the radio frequency transceiver module and the DBF processing module through the RDMA interface based on the hundred-Gigabit Ethernet RDMA networking communication protocol.

[0087] In a possible implementation manner, the function extension module, the radio frequency transceiver module and the DBF processing module each include an FPGA unit and an electro-optical conversion unit.

[0088] The functional extension module, the radio frequency transceiver module and the DBF processing module send electrical signals conforming to the RDMA networking communication protocol of the hundred G Ethernet to the electro-optical conversion unit through the FPGA unit, and the electro-optical conversion unit is used to convert the received electrical signals into optical signals and send the optical signals to the hundred G Ethernet switch through the RDMA interface.

[0089] The functional extension module, the radio frequency transceiver module and the DBF processing module convert the optical signals received from the hundred G Ethernet switch into electrical signals through the electro-optical conversion unit, and send the electrical signals converted from the optical signals to the FPGA unit, and the FPGA unit is used to receive the electrical signals to complete the work.

[0090] Wherein, RDMA (Remote Direct Memory Access, Remote Direct Memory Access) is a network communication technology that bypasses CPU and operating system kernel, and directly transmits high-speed data between the memories of two computers. It directly accesses the memory through hardware (each module in the embodiment), avoiding frequent CPU interrupts and memory copying in general network communication, significantly reducing the delay and improving the throughput, so it is very suitable for the distributed deployment scenario in the embodiment.

[0091] As shown in Figure 5 The communication connection of each module in the embodiment needs to configure the corresponding RDMA interface of the FPGA unit of each module to interact with the hundred G Ethernet switch in the possible implementation mode, but considering the actual application scenario of the distributed hardware deployment of the embodiment, therefore, the electrical signals sent by the FPGA unit need to be converted into optical signals (achieved through the electro-optical conversion unit), and the optical signals have the characteristics of small insertion loss and not easy to be disturbed, which can realize the long-distance communication between each module of the system in the embodiment, and the transmission distance can exceed 100m, breaking the physical form of the tight coupling of the hardware modules in the traditional architecture, so that the system can be split into multiple small physical units under the condition of limited physical space, and a high-bandwidth and low-delay local area network is formed through the optical signals and the hundred G Ethernet switch and each module, realizing free routing communication in the local area network, so that the physical form of the system in the embodiment is decoupled and realizes optical fiber communication.

[0092] In a possible design, the management and maintenance terminal stores an original IP routing strategy;

[0093] The original IP routing strategy is the correspondence relationship of the destination IP address of each functional extension, the IP address segment of each functional extension subarray, and the destination IP address of each functional extension and the IP address segment of each functional extension subarray, and the management and maintenance terminal is used to generate a real-time IP routing strategy according to the task information, and compare the real-time IP routing strategy with the original IP routing strategy to generate a system reconstruction instruction, and send the system reconstruction instruction to the hundred G Ethernet switch.

[0094] As Figure 6 shown, the second aspect of the embodiment provides a design method of the hardware system of the DBF digital beam synthesis system with the free array function as described in the first aspect of the design embodiment, which can but is not limited to include the following steps S1-S5:

[0095] S1. The functional extension module, the radio frequency transceiver module, the DBF processing module, and the hundred G Ethernet switch are set in the system as the basic system hardware respectively to establish a basic system hardware architecture, wherein each of the basic system hardware includes an FPGA unit, and the functional extension module includes a T / R transceiver array and a plurality of functional extensions;

[0096] S2. The FPGA unit in each of the basic system hardware is set with a hundred G Ethernet RDMA networkable communication protocol, and the FPGA unit in each of the basic system hardware is set with an RDMA interface;

[0097] S3. The RDMA interface of each of the basic system hardware is used to communicatively connect each of the basic system hardware with the hundred G Ethernet switch, and the T / R transceiver array is communicatively connected with the radio frequency transceiver module to construct an IP network communication architecture;

[0098] S4. The hundred G Ethernet switch and the management and maintenance terminal are communicatively connected, and the original IP routing strategy stored in the management and maintenance terminal is broadcasted to the basic system hardware architecture through the IP network communication architecture to allocate the original IP routing strategy to each of the basic system hardware, and complete the initial design of the DBF digital beam synthesis system with the free array function;

[0099] S5. On the basis of the DBF digital beam synthesis system with the free array function which has completed the initial design, the system reconstruction instruction sent by the management and maintenance terminal is acquired through the hundred G Ethernet switch, and the system reconstruction instruction is sent to the radio frequency transceiver module to reconstruct the functional extension module, and complete the final design of the DBF digital beam synthesis system with the free array function.

[0100] In specific implementation, the following data transmission steps are performed on the signal receiving path:

[0101] The control radio frequency transceiver module digitizes the received analog signal and sends it to the hundred G Ethernet switch through the RDMA interface;

[0102] The control hundred G Ethernet switch forwards the digital signal to the corresponding primary DBF processing module according to the original IP routing strategy;

[0103] The control primary DBF processing module synchronizes, amplitude and phase calibrates, and primary beam synthesizes the received multi-channel data, and sends the synthesized primary beam data back to the hundred G Ethernet switch through the RDMA interface;

[0104] The control hundred G Ethernet switch forwards the primary beam data to the designated secondary DBF processing module for secondary calibration and secondary beam synthesis according to the IP routing strategy, and sends the synthesized secondary beam data back to the hundred G Ethernet switch through the RDMA interface;

[0105] The control hundred G Ethernet switch forwards the secondary beam data to the designated final DBF processing module for final beam synthesis according to the original IP routing strategy, and sends the synthesized digital beam data back to the hundred G Ethernet switch through the RDMA interface;

[0106] The control hundred G Ethernet switch uses multicast or broadcast function to distribute the digital beam data to multiple function branches that need the data at the same time;

[0107] On the signal transmitting path, the following data transmission steps are performed:

[0108] When the task information display system needs to be reconstructed, the real-time IP routing strategy is issued through the management and maintenance terminal, and the system reconstruction instruction is generated;

[0109] The control hundred G Ethernet switch sends the system reconstruction instruction to each module according to the preset multicast or broadcast form, and completes the system reconstruction;

[0110] The control each function branch sends the digital baseband data to be sent to the hundred G Ethernet switch through the RDMA interface;

[0111] The control hundred G Ethernet switch sends the digital baseband data to multiple corresponding radio frequency transceiver modules according to the real-time IP routing strategy;

[0112] The control radio frequency transceiver module receives the digital baseband data as a digital signal, converts it to an analog signal through digital-to-analog conversion, and transmits it through the T / R array.

[0113] Finally, it should be noted that the above description is only the preferred embodiment of the present application, and is not intended to limit the protection scope of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A DBF digital beam forming system with free group array function, characterized in that, The functional branch module, the radio frequency transceiver module, the DBF processing module, the management and maintenance terminal and the hundred G Ethernet switch are included, and the functional branch module includes a T / R transceiver array and multiple functional branches. The T / R transceiver array in the functional branch module is configured to obtain external radio frequency signals, and process the external radio frequency signals to form analog signals, and each functional branch in the functional branch module is configured to receive digital beam data transmitted by the hundred G Ethernet switch, and execute an upper layer application task corresponding to the digital beam data. The radio frequency transceiver module is configured to receive analog signals transmitted by the T / R transceiver array, generate corresponding digital signals, and transmit the digital signals to the hundred G Ethernet switch. The DBF processing module is configured to receive digital signals transmitted by the hundred G Ethernet switch, perform synchronization processing on the digital signals, complete amplitude and phase calibration and beam synthesis, generate digital beam data, and transmit the digital beam data to the hundred G Ethernet switch. The management and maintenance terminal is configured to obtain task information from the outside, generate a corresponding real-time IP routing strategy according to the task information, generate a system reconstruction instruction according to the real-time IP routing strategy, and transmit the system reconstruction instruction to the radio frequency transceiver module. The hundred G Ethernet switch is configured to exchange data with the functional branch module, the radio frequency transceiver module and the DBF processing module, obtain the system reconstruction instruction from the management and maintenance terminal, and forward the system reconstruction instruction to the radio frequency transceiver module. The radio frequency transceiver module is further configured to receive the system reconstruction instruction transmitted by the hundred G Ethernet switch, and transmit a subarray reconstruction signal to the T / R transceiver array. The functional branch module is further configured to perform module reconstruction according to the received subarray reconstruction signal to obtain a reconstructed array.

2. The DBF digital beam combining system with free-group-array function according to claim 1, characterized in that, The T / R transceiver array includes multiple functional branch subarrays, each of which corresponds to a functional branch, and each of the functional branch subarrays includes multiple array elements, each of which is a T / R component. Each array element corresponds to an array element IP address, and each functional branch corresponds to at least one array element IP address. Each functional branch corresponds to a destination IP address, and the destination IP address of each functional branch corresponds to the IP address segment of each functional branch subarray.

3. The DBF digital beam synthesizing system with free group array function according to claim 1, characterized in that, Each of the functional branches in the functional branch module is configured to execute a different upper layer application task. The upper layer application task includes a radar detection task, a target identification task, a target tracking task, an electronic countermeasure task and / or an information communication task.

4. The DBF digital beam synthesizing system with free group array function according to claim 1, characterized in that, The number of radio frequency transceiver modules is multiple, and the number of DBF processing modules is multiple. Each radio frequency transceiver module is in communication connection with the T / R transceiver array, and each radio frequency transceiver module is in one-to-one correspondence with one DBF processing module.

5. The DBF digital beam synthesizing system with free group array function according to claim 1, characterized in that, The DBF processing module comprises a primary DBF processing module, a secondary DBF processing module and a final DBF processing module. The primary DBF processing module is in communication connection with the T / R array, receives analog signals transmitted by the T / R array, performs time synchronization processing and amplitude and phase calibration processing on the analog signals, performs primary beam synthesis on the processed analog signals to generate primary beam data, and transmits the primary beam data to the hundred-G Ethernet switch to realize primary beam data forwarding. The secondary DBF processing module is in communication connection with the hundred-G Ethernet switch, receives the primary beam data forwarded by the hundred-G Ethernet switch, performs secondary calibration and secondary beam synthesis on the primary beam data to generate secondary beam data, and transmits the secondary beam data to the hundred-G Ethernet switch to realize secondary beam data forwarding, wherein the secondary beam data is a wide beam. The final DBF processing module is in communication connection with the hundred-G Ethernet switch, receives the secondary beam data forwarded by the hundred-G Ethernet switch, performs final beam synthesis on the secondary beam data to generate at least one digital beam data, and transmits the digital beam data to the hundred-G Ethernet switch to forward the digital beam data to each of the function extensions, wherein each of the digital beam data corresponds to one of the upper-layer application tasks.

6. The DBF digital beam synthesizing system with free group array function according to claim 5, characterized in that, The system further comprises a fault detection module configured to detect whether the DBF processing module has a fault. The DBF processing module further comprises a plurality of backup DBF processing modules, the fault detection module is in communication connection with the hundred-G Ethernet switch, and when it is detected that the DBF processing module has a fault, the fault detection module generates and transmits fault module information to the hundred-G Ethernet switch, and the hundred-G Ethernet switch forwards the fault module information to the management and maintenance terminal. The management and maintenance terminal is configured to receive the fault module information, generate real-time IP routing strategies according to the fault module information, and transmit the real-time IP routing strategies to the hundred-G Ethernet switch, and the hundred-G Ethernet switch broadcasts the real-time IP routing strategies to complete fault elimination.

7. The DBF digital beam synthesizing system with free group array function according to claim 1, characterized in that, The hundred-G Ethernet switch is in communication connection with the function extension module, the radio frequency transceiver module and the DBF processing module through an RDMA interface based on a hundred-G Ethernet RDMA networking communication protocol.

8. The DBF digital beam synthesizing system with free group array function according to claim 7, characterized in that, The function extension module, the radio frequency transceiver module and the DBF processing module each comprise an FPGA unit and an electro-optical conversion unit. The function extension module, the radio frequency transceiver module and the DBF processing module transmit electrical signals conforming to the hundred-G Ethernet RDMA networking communication protocol to the electro-optical conversion unit through the FPGA unit, and the electro-optical conversion unit converts the received electrical signals into optical signals and transmits the optical signals to the hundred-G Ethernet switch through the RDMA interface. The function extension module, the radio frequency transceiver module and the DBF processing module convert the optical signal received from the hundred G Ethernet switch into an electrical signal through the electro-optical conversion unit, and send the electrical signal converted from the optical signal to the FPGA unit, which is used to receive the electrical signal to complete work.

9. The DBF digital beam synthesizing system with free group array function according to claim 2, characterized in that, The management and maintenance terminal stores an original IP routing strategy; The original IP routing strategy is the destination IP address of each function extension, the IP address segment of each function extension subarray, and the correspondence between the destination IP address of each function extension and the IP address segment of each function extension subarray, and the management and maintenance terminal is used to generate a real-time IP routing strategy according to the task information, and compare the real-time IP routing strategy with the original IP routing strategy to generate a system reconstruction instruction, and send the system reconstruction instruction to the hundred G Ethernet switch.

10. A method for designing a DBF digital beam forming system with free array function, characterized in that, The DBF digital beam synthesis system with the function of free array is designed, and the DBF digital beam synthesis system with the function of free array is designed. The function extension module, the radio frequency transceiver module, the DBF processing module and the hundred G Ethernet switch are arranged in the system as basic system hardware to establish a basic system hardware architecture, wherein each of the basic system hardware includes an FPGA unit, and the function extension module includes a T / R transceiver array and a plurality of function extensions. The FPGA unit in each basic system hardware is provided with a hundred G Ethernet RDMA networkable communication protocol, and the FPGA unit in each basic system hardware is provided with an RDMA interface. The RDMA interface of each basic system hardware is used to communicatively connect each basic system hardware with the hundred G Ethernet switch, and the T / R transceiver array is communicatively connected with the radio frequency transceiver module to construct an IP network communication architecture. The hundred G Ethernet switch and the management and maintenance terminal are communicatively connected, and the original IP routing strategy stored in the management and maintenance terminal is broadcasted to the basic system hardware architecture through the IP network communication architecture to allocate the original IP routing strategy to each basic system hardware, thereby completing the initial design of the DBF digital beam synthesis system with the function of free array. On the basis of the DBF digital beam synthesis system with the function of free array which is completed by the initial design, the system reconstruction instruction sent by the management and maintenance terminal is acquired through the hundred G Ethernet switch, and the system reconstruction instruction is sent to the radio frequency transceiver module to reconstruct the function extension module, thereby completing the final design of the DBF digital beam synthesis system with the function of free array.

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