CN114422031A - Laser communication system - Google Patents
Laser communication system Download PDFInfo
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- CN114422031A CN114422031A CN202210112323.4A CN202210112323A CN114422031A CN 114422031 A CN114422031 A CN 114422031A CN 202210112323 A CN202210112323 A CN 202210112323A CN 114422031 A CN114422031 A CN 114422031A
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/11—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum
- H04B10/118—Arrangements specific to free-space transmission, i.e. transmission through air or vacuum specially adapted for satellite communication
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04B—TRANSMISSION
- H04B10/00—Transmission systems employing electromagnetic waves other than radio-waves, e.g. infrared, visible or ultraviolet light, or employing corpuscular radiation, e.g. quantum communication
- H04B10/50—Transmitters
- H04B10/501—Structural aspects
- H04B10/503—Laser transmitters
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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- Optics & Photonics (AREA)
- Optical Communication System (AREA)
Abstract
The invention relates to a laser communication system, which comprises a storage control module, an interface module and a laser communication module, wherein the storage control module is used for writing data in communication terminal equipment into a storage module, reading the data stored in the storage module and transmitting the data to the interface module; the interface module is used for transmitting data to the laser communication module; the laser communication module is used for converting the data into optical signals and then transmitting the optical signals to the optical-mechanical module; the optical-mechanical module is used for transmitting the optical signal to the space in a laser mode for transmission; the optical-mechanical module is also used for capturing and receiving the laser transmitted from the space, generating an optical signal and transmitting the optical signal to the laser communication module; the laser communication module is also used for converting the optical signal into data and transmitting the data to the interface module; the interface module is also used for transmitting data to the storage control module; the data source and verification module is used for generating data with a preset rate and a preset type and is also used for carrying out crc (crc) verification on the data; the processor module is used for controlling the modules to work coordinately. The invention can realize the functions of data storage, ascending, descending and inspection.
Description
Technical Field
The invention relates to the field of communication, in particular to a laser communication system.
Background
The space laser communication technology combines the advantages of radio communication and optical fiber communication, and uses laser as a carrier wave for communication. The space laser communication technology has the advantages of strong anti-interference capability, high safety, high communication speed, high transmission speed, convenient waveband selection and large information capacity, and is characterized by small system volume, light weight, low power consumption, simple construction, flexibility and maneuverability, and great strategic demands and application values in the military and civil fields.
The satellite service data is finally transmitted back to the ground, a microsatellite constellation with relay data transmission capability is established, relay transmission of the data among the satellites is realized, and the method is an effective means for realizing satellite-to-ground downlink transmission. Therefore, it is an urgent problem to establish a laser communication product with bidirectional data transmission capability suitable for the application of the microsatellite.
Disclosure of Invention
The technical problem to be solved by the invention is to provide a laser communication system which can realize data storage and mutual transmission through a communication link of space laser.
The technical scheme for solving the technical problems is as follows: a laser communication system comprises a storage control module, a storage module, an interface module, a laser communication module and an optical-mechanical module;
the storage control module is used for writing data in the communication terminal equipment into the storage module and reading out and transmitting the data stored in the storage module to the interface module;
the interface module is used for transmitting the data transmitted by the storage control module to the laser communication module;
the laser communication module is used for converting the data transmitted by the interface module into optical signals and then transmitting the optical signals to the optical-mechanical module;
the optical-mechanical module is used for transmitting the optical signal transmitted by the laser communication module to a space in a laser mode for transmission;
the optical-mechanical module is also used for capturing and receiving laser emitted from the space, generating an optical signal and transmitting the optical signal to the laser communication module;
the laser communication module is also used for converting the optical signal transmitted by the optical-mechanical module into data and transmitting the data to the interface module;
the interface module is also used for transmitting the data transmitted by the laser communication module to the storage control module;
and the storage control module is also used for writing the data transmitted by the interface module into the storage module.
The invention has the beneficial effects that: the laser communication system can realize the storage and downlink functions of the satellite load data; the function of storing ground data ascending to the satellite terminal equipment can be realized; meanwhile, the method can also be applied between satellites.
On the basis of the technical scheme, the invention can be further improved as follows.
Further, the system also comprises a data source and a verification module;
the interface module is also used for transmitting the data transmitted by the storage control module or the laser communication module to the data source and the verification module;
the data source and verification module is used for configuring the data transmitted by the interface module, generating data with a preset rate and a preset type, and transmitting the data with the preset rate and the preset type generated by configuration to the interface module;
and the interface module is also used for transmitting the data transmitted by the data source and the verification module to the storage control module or the laser communication module.
Further, the data source and verification module is also used for performing crc check or rate test on the data transmitted by the interface module.
The beneficial effect of adopting the further scheme is that: the laser communication system can generate data of various types and sizes, can verify the transmission function and the data transmission performance of a transmission link by transmitting the data of different types and sizes, and can be widely applied to laser communication terminal products.
The processor module is respectively connected with the optical-mechanical module, the laser communication module, the interface module, the storage control module and the data source and verification module;
the processor module is used for controlling the optical-mechanical module, the laser communication module, the interface module, the storage control module and the data source and verification module to work in a coordinated manner;
the processor module is also used for reading or writing data from or into the storage module through the storage control module.
Further, the interface module has a gating function of a data transmission path, and the gating function is used for configuring a transmission path of data among the storage control module, the laser communication module and the data source and verification module.
Further, the storage module is specifically a solid state disk, a mechanical hard disk or a hybrid hard disk.
Further, the laser communication module is specifically configured to perform channel coding on the data transmitted by the interface module to generate an electrical signal, convert the electrical signal into an optical signal, and transmit the optical signal to the optical-mechanical module through an optical fiber;
the laser communication module is further specifically configured to receive the optical signal transmitted by the optical-mechanical module through an optical fiber, convert the optical signal into an electrical signal, decode the electrical signal through a channel to generate data, and transmit the generated data to the interface module.
Further, the system also comprises a computer module;
the computer module is used for exporting data from the storage module through the storage control module based on Ethernet and carrying out verification.
Further, the laser communication system is applied to communication between a satellite and the ground or communication between the satellite and the satellite.
Drawings
FIG. 1 is a block diagram of a laser communication system according to the present invention;
FIG. 2 is a block diagram of a laser communication system between a satellite and the ground;
FIG. 3 is a flow chart of a processor controlling communication, data storage and verification.
Detailed Description
The principles and features of this invention are described below in conjunction with the following drawings, which are set forth by way of illustration only and are not intended to limit the scope of the invention.
As shown in fig. 1, a laser communication system includes a storage control module, a storage module, an interface module, a laser communication module, and an optical-mechanical module;
the storage control module is used for writing data in the communication terminal equipment into the storage module and reading out and transmitting the data stored in the storage module to the interface module;
the interface module is used for transmitting the data transmitted by the storage control module to the laser communication module;
the laser communication module is used for converting the data transmitted by the interface module into optical signals and then transmitting the optical signals to the optical-mechanical module;
the optical-mechanical module is used for transmitting the optical signal transmitted by the laser communication module to a space in a laser mode for transmission;
the optical-mechanical module is also used for capturing and receiving laser emitted from the space, generating an optical signal and transmitting the optical signal to the laser communication module;
the laser communication module is also used for converting the optical signal transmitted by the optical-mechanical module into data and transmitting the data to the interface module;
the interface module is also used for transmitting the data transmitted by the laser communication module to the storage control module;
and the storage control module is also used for writing the data transmitted by the interface module into the storage module.
In this particular embodiment: the storage module is specifically a solid state disk, a mechanical hard disk or a hybrid hard disk.
In this particular embodiment: the laser communication module is specifically used for performing channel coding on the data transmitted by the interface module to generate an electric signal, converting the electric signal into an optical signal and transmitting the optical signal to the optical-mechanical module through an optical fiber; the laser communication module is further specifically configured to receive the optical signal transmitted by the optical-mechanical module through an optical fiber, convert the optical signal into an electrical signal, decode the electrical signal through a channel to generate data, and transmit the generated data to the interface module. In addition, the laser communication module can also realize data processing functions such as scrambling/descrambling of data, serial-parallel conversion, transmission verification of data frames and the like.
In this particular embodiment: the optical-mechanical module mainly comprises an optical-mechanical tracking optical unit, a communication laser transmitting optical unit and a communication laser receiving optical unit, and realizes the functions of transmitting, receiving, detecting, capturing and tracking communication laser.
In this particular embodiment: the laser communication system is applied to communication between a satellite and the ground or communication between the satellite and the satellite.
Specifically, the laser communication system of the present invention can be applied to a laser communication terminal device between a satellite and the ground, and can also be applied to a laser communication terminal device between a satellite and a satellite. The data transmission path of the whole laser communication system includes two directions, as shown in fig. 2, taking communication between a satellite and the ground as an example, one path is data transmission in the satellite-to-ground direction, and the other path is data transmission in the ground-to-satellite direction. The two-way transmission is symmetrical, and the following explains the present invention by taking the data transmission process in one direction as an example.
For laser communication systems on satellites: the laser communication system on the satellite receives the data of the communication terminal equipment on the satellite, and then the data is stored in the storage module under the control of the storage control module; after receiving a request command of a laser communication system on the ground, a storage control module in the laser communication system on the satellite can automatically read data from a storage module and send the data to an interface module, a transmission path configured by the interface module is the laser communication module, the data is forwarded to the laser communication module, the laser communication module carries out channel coding on the data and then converts an electric signal into an optical signal through a high-speed interface and an optical unit and transmits the optical signal to an optical fiber and then the optical signal is transmitted to an optical machine module through the optical fiber, and the optical machine module finally sends the optical signal to a space in a laser form for transmission through processing of an optical path and the like.
For laser communication systems on the ground: the optical-mechanical module in the ground laser communication system can self-adaptively adjust self equipment, capture and accurately receive laser emitted in space, finally converge the received optical signal into an optical fiber, continuously transmit the optical signal downwards into the laser communication module, the laser communication module can convert the received optical signal into an electrical signal and perform processing such as channel decoding, and finally recover original data, and the data is transferred and stored into the storage module after passing through the interface module.
In addition, in this particular embodiment: the invention also includes a computer module; the computer module is used for exporting data from the storage module through the storage control module based on Ethernet and carrying out verification. The computer module can be connected with the storage control module through a network, and the data in the storage module is read into the computer module through the storage control module to be checked, played or checked and the like; for example, the computer module checks for data including, but not limited to, incremental data, prbs data, and communication frame data.
In this particular embodiment: the invention also comprises a data source and a verification module; the interface module is also used for transmitting the data transmitted by the storage control module or the laser communication module to the data source and the verification module; the data source and verification module is used for configuring the data transmitted by the interface module, generating data with a preset rate and a preset type, and transmitting the data with the preset rate and the preset type generated by configuration to the interface module; and the interface module is also used for transmitting the data transmitted by the data source and the verification module to the storage control module or the laser communication module.
In this particular embodiment: the data source and verification module is also used for carrying out crc check or rate test on the data transmitted by the interface module.
In this particular embodiment: the invention also comprises a processor module which is respectively connected with the optical-mechanical module, the laser communication module, the interface module, the storage control module and the data source and verification module; the processor module is used for controlling the optical-mechanical module, the laser communication module, the interface module, the storage control module and the data source and verification module to work in a coordinated manner; the processor module is also used for reading or writing data from or into the storage module through the storage control module.
In this particular embodiment: the interface module has a gating function of a data transmission path, and the gating function is used for configuring the transmission path of data among the storage control module, the laser communication module and the data source and verification module. Specifically, the gating function of the interface module is configured by the processor module.
The laser communication system can also realize the data source generating function and the data checking function, the data source and the verifying module can be configured through the processor module to generate the data type and the data size required by a user, and the data type and the data size are sent to the laser communication system on the ground and/or the laser communication system on the satellite for storage and verification, so that the correctness of communication data can be verified, and both directions can be realized.
The data source and verification module may generate different rates of different types of data through configuration of the processor module. The rate configuration may range from 150MB/s to 2400 MB/s; meanwhile, 3 types of data are supported, including PRBS-31 data, single byte increment data and 882 byte frame data; in addition, the data source and verification module also has the functions of crc check of data and speed test of data transmission.
For example 10GB size PRBS-31 data at 10Gbit/s rate is to be generated. First, a data source register is configured, default data is from the laser communication module, then a data rate register is configured to be 2 'b 01, the rate is 10Gbit/s, and a data volume register is configured to be 32'd 671088640, the unit of the register is 16 bytes.
The data testing path from the satellite to the ground is divided into two modes:
the first mode is that the data of the storage control module on the satellite comes from a data source and a verification module and goes to a storage module, after the data is stored, the data is sent to the storage module in the laser communication system on the ground through the storage control module, the interface module, the laser communication module and the optical-mechanical module in sequence to be stored, then the data is configured to the data source and the verification module on the ground to perform crc check on the data, and meanwhile, a check result is reported;
the second mode is that the data of the laser communication module on the satellite can be configured to be from a data source and a verification module, the data of the data source can be directly sent through the laser communication module, the laser communication system on the ground receives and stores the data, the data stored by the storage module on the ground is read into the data source and the verification module, and the crc check is carried out while the number of data bytes is counted; the data stored in the ground storage module can be exported to a ground computer module through an Ethernet port, and can be verified through data verification software in the computer.
The ground-to-satellite data test path is the same as the satellite-to-ground data test path.
In the invention, the processor module can be specifically an ARM processor and is responsible for the functions of instruction forwarding, control and flow scheduling of each module and the like. The flow of the processor controlling communication, data storage and verification is shown in fig. 3, where the laser communication system on the satellite is defined as a system a, and the laser communication system on the ground is defined as a system B. Firstly, a system A and a system B are electrified for initialization, and after the initialization is completed, a storage file of the system A is opened first to prepare data storage (disc writing operation); then starting the receiving of the satellite load data, wherein if the data comes from the data source and the verification module, the data source and the verification module can be configured and opened; when the data is received and stored all the time, judging that the data on the system A is stored under the condition that the statistical data received by the storage module is not changed, jumping to the next stage to close the stored file, and if the data is not transmitted, continuing to store; after the storage file of the system A is closed, the completion of the storage process of the satellite load data is marked; next, whether the data of the system A needs to be downloaded to the ground or not is waited for an instruction (ground instruction forwarding), if the data needs to be downloaded, the laser communication module and the optical-mechanical module of the system A need to be configured, meanwhile, the optical-mechanical module and the laser communication module need to be configured by the system B, A, B, the two systems are configured completely, after the two systems have sending and receiving states, the storage file of the system B is opened, the system A starts to read the stored file, and the sending process of the data of the system A to the system B is carried out; when the system B finishes data receiving, closing the storage file; at the moment, the data of the satellite load is stored in a ground storage module, at the moment, the ground computer module and the storage control module are connected through the Ethernet, the data of the storage module is exported to the computer module through the Ethernet, then, the verification of the data file is carried out through verification software installed in the computer, and a verification result is output. A. And the data transmission system of the system B completes the verification process from A to B.
The invention can realize the functions of transmission, storage and verification of communication data in the laser terminal product, not only can effectively verify the basic functions of the product, but also can verify the data transmission performance of the whole path. The method can be widely applied to laser communication terminal products.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (9)
1. A laser communication system, characterized by: the laser communication module comprises a storage control module, a storage module, an interface module, a laser communication module and an optical-mechanical module;
the storage control module is used for writing data in the communication terminal equipment into the storage module and reading out and transmitting the data stored in the storage module to the interface module;
the interface module is used for transmitting the data transmitted by the storage control module to the laser communication module;
the laser communication module is used for converting the data transmitted by the interface module into optical signals and then transmitting the optical signals to the optical-mechanical module;
the optical-mechanical module is used for transmitting the optical signal transmitted by the laser communication module to a space in a laser mode for transmission;
the optical-mechanical module is also used for capturing and receiving laser emitted from the space, generating an optical signal and transmitting the optical signal to the laser communication module;
the laser communication module is also used for converting the optical signal transmitted by the optical-mechanical module into data and transmitting the data to the interface module;
the interface module is also used for transmitting the data transmitted by the laser communication module to the storage control module;
and the storage control module is also used for writing the data transmitted by the interface module into the storage module.
2. The laser communication system of claim 1, wherein: the system also comprises a data source and a verification module;
the interface module is also used for transmitting the data transmitted by the storage control module or the laser communication module to the data source and the verification module;
the data source and verification module is used for configuring the data transmitted by the interface module, generating data with a preset rate and a preset type, and transmitting the data with the preset rate and the preset type generated by configuration to the interface module;
and the interface module is also used for transmitting the data transmitted by the data source and the verification module to the storage control module or the laser communication module.
3. The laser communication system of claim 2, wherein: the data source and verification module is also used for carrying out crc check or rate test on the data transmitted by the interface module.
4. The laser communication system according to claim 2 or 3, wherein: the processor module is respectively connected with the optical-mechanical module, the laser communication module, the interface module, the storage control module and the data source and verification module;
the processor module is used for controlling the optical-mechanical module, the laser communication module, the interface module, the storage control module and the data source and verification module to work in a coordinated manner;
the processor module is also used for reading or writing data from or into the storage module through the storage control module.
5. The laser communication system according to claim 2 or 3, wherein: the interface module has a gating function of a data transmission path, and the gating function is used for configuring the transmission path of data among the storage control module, the laser communication module and the data source and verification module.
6. The laser communication system according to any one of claims 1 to 3, wherein: the storage module is specifically a solid state disk, a mechanical hard disk or a hybrid hard disk.
7. The laser communication system according to any one of claims 1 to 3, wherein: the laser communication module is specifically used for performing channel coding on the data transmitted by the interface module to generate an electric signal, converting the electric signal into an optical signal and transmitting the optical signal to the optical-mechanical module through an optical fiber;
the laser communication module is further specifically configured to receive the optical signal transmitted by the optical-mechanical module through an optical fiber, convert the optical signal into an electrical signal, decode the electrical signal through a channel to generate data, and transmit the generated data to the interface module.
8. The laser communication system according to any one of claims 1 to 3, wherein: also includes a computer module;
the computer module is used for exporting data from the storage module through the storage control module based on Ethernet and carrying out verification.
9. The laser communication system according to any one of claims 1 to 3, wherein: the laser communication system is applied to communication between a satellite and the ground or communication between the satellite and the satellite.
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| CN202210112323.4A CN114422031B (en) | 2022-01-29 | 2022-01-29 | Laser communication system |
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| CN202210112323.4A CN114422031B (en) | 2022-01-29 | 2022-01-29 | Laser communication system |
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| US20060155840A1 (en) * | 2003-05-27 | 2006-07-13 | Macdonald Dettwiler And Associates Ltd. | Satellite communications system for providing global, high quality movement of very large data files |
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