JP2007266916A - Data link device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To perform connections to a plurality of networks with one data link device by realizing availability of software in regions ranging from cipher and modem regions down to a command control processor region. <P>SOLUTION: The data link device is equipped with a real time command control processor in which FPGAs (Field Programmable Gate Array) and CPUs are parallel-connected, respectively and formulaic signal processing and sophisticated information processing are parallelized by the FPGAs and the CPUs, respectively. It is realized for the data link device to function as one data link device by sliming a cipher/modem functions and a message transforming function by a software wireless device. <P>COPYRIGHT: (C)2008,JPO&INPIT

Description

  The present invention relates to a data link device that realizes air interfaces of various networks by software defined radios.

In a mobile radio communication apparatus that performs positioning of a target radar wave using a plurality of platforms, it is necessary to receive information transmitted from other platforms and perform predetermined signal processing while referring to the information. For this reason, a data link device as an information sharing means is used.
For example, each platform of a ship or aircraft obtains its position and radio wave reception time using GPS using artificial satellites, and obtains radio wave reception times on other platforms using a data link device. A system in which the arrival direction of a target radar wave is obtained with high accuracy using the principle is known. (For example, see Patent Document 1)

  However, in the conventional data link device, it is generally possible to link only between specific networks using a wireless communication device, and it is easy to simultaneously connect a plurality of networks having different forms, for example, different frequencies. Could not be realized. In particular, in ships and aircraft that detect incoming radio waves from suspicious aircraft and determine their arrival position, multiple data covering various frequency bands are used to identify the frequency of incoming radio waves. It is necessary to equip a link device, and a large installation space is required. When the above network is changed or added, each data link device needs to be repaired or added, and system maintenance and management are complicated. It was a thing.

  On the other hand, as a device that enables communication between different forms, a wireless communication device using software wireless technology is known from Patent Document 2, for example. According to this, even if the communication type is switched, for example, switching from voice call to data communication in a mobile radio communication device, a software module for data communication is simply installed without collecting and modifying the terminal. By reading from a storage device or downloading from a base station, it becomes possible to cope with it easily and efficiently.

  A conventional data link apparatus using such software radio technology will be described with reference to FIG. In the conventional data link device, the processing in the encryption / modem area is performed by the digital signal processor (DSP) X, and the message conversion processing is performed by the mission computer Y in the next layer. This is because in order to include the message conversion processing in the data link device and realize the above DSP alone, the processing ability of the DSP alone could not catch up with the enormous processing load, and the increase in the amount of information could not be handled. is there.

  For this reason, conventional data link devices can only implement software up to the encryption / modem area, so one data link device must be installed on one network, and connected to multiple networks simultaneously. Was difficult. Therefore, when constructing a data link between various networks in the future, the number of devices increases for each network, and it is necessary to repair the data link device every time the network is changed.

In addition, for example, in a data link device for a fighter aircraft, weapons such as missiles are used based on sensor information such as the radar of the aircraft, but by emitting radio waves, the position of the aircraft is located by the enemy aircraft, Conversely, there is a possibility of becoming a target such as a radio wave guided missile.
There is also a passive sensor that collects information by receiving only the bounced radio wave of the own aircraft from the radio wave emitted from the enemy aircraft radar without emitting radio waves from its own aircraft, but the direction of the enemy aircraft is due to time difference method etc. Although it can be confirmed immediately, the positioning requires a certain amount of time. In particular, when a high-speed moving body such as a fighter is to be followed, the passive sensor cannot cope.

  Therefore, if it is possible to connect to a plurality of networks with a single data link device, the positioning accuracy can be improved, and the sensor information from the wingman can be obtained without using the own sensor. As a result, the position of the enemy aircraft can be determined, and the position of the enemy aircraft is not determined by the enemy aircraft.

JP-A-7-146349 JP 2002-335186 A

  The present invention has been made in order to solve the above-described problems. By realizing software implementation from the encryption / modem area to the command / control / processor area, a plurality of data links can be obtained by one data link device. It is possible to connect to different networks.

  In a data link device that decodes messages of a plurality of networks by a message conversion function and transfers them to a selected data link destination, an FPGA (Field Programmable Gate Array) and a CPU are connected in parallel, and standard signal processing is performed by the FPGA. A real-time command control processor that enables high-speed processing by parallel processing of high-level information processing by each CPU, and processing the encryption / modem function and message conversion function together in one device The connection to a plurality of networks is realized with one data link device.

  By installing this data link device, flexible adaptation to different networks can be realized using software defined radio technology. Even when data links are constructed between various networks later, the data link device can be replaced. It is possible to cope with only the change of software without performing it.

Embodiment 1 FIG.
FIG. 1 shows a schematic configuration of a data link device according to Embodiment 1 of the present invention. The figure is used for a data link device for a fighter. In the figure, 1 to 3 are receivers of different frequency bands, and 4 to 8 are different networks. 4 is a network between formations and wingmen (S-Net), 5 is a command link (F-Net), 6 is Link-16, 7 is a tactical network (T-Net), and 8 is a narrowband (Narrowband). . A real-time command control processor 9 converts messages of different networks by software and transfers the results. Note that 10 indicates weapon information in the wingman 14, 11 indicates sensor information in the wingman 14, 20 indicates a data link, and 30 indicates a network.

  Conventionally, as described above, the encryption / modem area of the data link 20 is performed by the software defined radio. However, in the data link device according to the first embodiment, the message conversion area of the command / control processor 9 is reached. Is a software radio. The specific configuration method will be described later. In the figure, when the sensor information 11 of the wingman 14 enters the data link device through, for example, the X and Ku band receivers 1 and the S-Net 4, the command control processor 9 , For example, is converted into a message format of F-Net5 and transferred to the wingman 14 through the F-Net5, L, S, C band receiver 2 as weapon information 10.

  FIG. 2 is a conceptual diagram showing a state of use of the fighter aircraft network. In the figure, 12 indicates enemy aircraft, 13 indicates own aircraft, 14 indicates wingmen, and 15 indicates missiles. By processing data link information having different message systems depending on the data link device and obtaining sensor information of the wingman 14, it is possible to more accurately determine the position of the enemy aircraft 12 by integrating a plurality of sensor information. it can. In addition, since all fighter aircraft information in the aircraft formation can be shared in real time through the data link, the position information of enemy aircraft determined from the consort aircraft sansa can be linked to the data link without using the aircraft sensor. The position of the enemy aircraft can be determined and weapons such as missiles can be used without emitting radio waves from the own aircraft 13. Furthermore, by obtaining the status information of the wingman 14 such as the position, the remaining number of bullets, the remaining fuel, and the orientation information (lock-on) via the data link, it becomes possible to take an accurate battle posture. .

  Next, an example of a processing method in the data link device according to the first embodiment will be described with reference to the flowchart of FIG. Since there are usually a plurality (A, B, C) of data link information received from an antenna (not shown) (step S100), first, which data link information is to be processed is selected (step S101). Subsequently, received signal processing such as A / D conversion, error correction processing, and demodulation processing is performed on the information (step S102). Steps S100 to S102 are processing in the encryption / modem area.

  Of the information (sensor information, weapon information, position information, etc.) obtained by the demodulation process, which information is to be converted is selected (step S103). Next, the data link message to be converted is selected (step S104), and converted to the selected message format (step S105). Steps S103 to S105 are processes performed by the command control processor 9. Subsequently, the converted message is subjected to transmission signal processing (step S106) such as modulation processing, error correction processing, and D / A conversion, and transferred to the designated data link (X, Y, Z) (step S107). Steps S106 and S107 are processes in the modem area.

  In the above-described data link apparatus, conventionally, processing in the encryption / modem area is performed by a digital signal processor (DSP), and message conversion processing is performed by a mission computer (CPU) in another layer. Therefore, it has been explained that there is a limit to the realization of the DSP alone including all the message conversion processing in the data link device due to the processing capacity of the processor.

  According to the first embodiment of the present invention, by configuring a parallel circuit of a CPU and an FPGA, one signal link apparatus can perform a standard signal processing by an FPGA and an advanced information processing by a CPU in parallel. It is possible to process as described above. The FPGA (Field Programmable Gate Array) is a kind of S-RAM-based gate array (logic circuit) that can be rewritten any number of times, and a plurality of processes can be performed by circuit software. FIG. 4 is a schematic configuration diagram showing an example of a signal / information processing fusion circuit composed of a parallel circuit of the CPU and FPGA.

  The typical signal processing refers to reception signal processing (S102), message conversion processing (S105), and transmission signal processing (S106) in the flowchart shown in FIG. Selection (S101), message information selection (S103), conversion format selection (S104). That is, after receiving the signal (S100), the CPU performs band selection (S101), and at the same time, the FPGA downloads the circuit software for the reception band selected from the ROM provided in the FPGA to form a dedicated circuit. Receive signal processing (S102) is performed.

  Next, the CPU selects the message information (S103) and the conversion format (S104). At the same time, the FPGA downloads the circuit software for the selected format from the ROM, forms a dedicated circuit, and converts the message. Processing (S105) is performed, and another FPGA downloads circuit software for the transmission band selected from the ROM, forms a dedicated circuit, and performs transmission signal processing (S106).

  As described above, an FPGA having a processing capability much larger than that of the DSP is connected in parallel with the CPU, and these can be processed in parallel to enable high-speed processing, which can be realized as one data link device. One data link device can realize connection to a plurality of networks. Therefore, it is possible to flexibly cope with a plurality of different networks by changing or adding software, and not only information links between aircraft but also information on various networks such as aircraft-ships, aircraft-satellite, etc. It is possible to obtain an ideal data link device that can be shared, has both flexibility as software and high-speed processing as hardware, and can greatly reduce system maintenance, management, and costs.

It is a figure which shows schematic structure of the data link apparatus by this invention. It is a conceptual diagram which shows the use condition of the data link apparatus by this invention. It is a flowchart explaining an example of the processing method in the data link apparatus by this invention. It is a schematic block diagram which shows an example of the signal / information processing fusion circuit in the data link device by this invention. It is a figure which shows schematic structure of the conventional data link apparatus.

Explanation of symbols

1, 2, 3 frequency band receivers, 4, 5, 6, 7, 8 different networks,
9 Command control processor, 10 Weapon information,
11 Sensor information, 12 Enemy aircraft, 13 Own aircraft,
14 enemy aircraft, 20 data links, 30 networks.

Claims (4)

  In a data link device that decodes messages of a plurality of networks by a message conversion function and transfers them to a selected data link destination, an FPGA (Field Programmable Gate Array) and a CPU are connected in parallel, and standard signal processing is performed by the FPGA. A real-time command control processor that enables high-speed processing by parallel processing of high-level information processing by each CPU, and processing the encryption / modem function and message conversion function together in one device A data link device characterized in that connection to a plurality of networks is realized by one data link device. 2. The data link according to claim 1, wherein the real-time command control processor realizes various network interfaces having different frequency bands by switching software with a software radio. apparatus. The above-mentioned real-time command control processor is adapted to respond by adding or changing software even when a new data link is added or an existing data link is changed by a software defined radio. The data link device according to claim 1. The typical signal processing includes reception signal processing, message conversion processing, and transmission signal processing, and advanced information processing includes band selection, message information selection, and conversion format selection. Item 2. The data link device according to Item 1.

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