RU222331U1 - Satellite terrestrial user terminal for satellite communications - Google Patents

Abstract

The utility model relates to a satellite ground-based subscriber terminal for satellite communications. The technical result is the ability to test and diagnose modules without disassembling the terminal design. For this purpose, the terminal is made in the form of functionally complete modules on separate printed circuit boards of the same design, placed in the terminal design in guides, intermodular connection connectors are installed on the rear side of the printed circuit boards, and on the front side of the terminal body, each module has a front panel with removable screws clamps and handles for removing modules from the guides. 2 ill.

Description

A utility model of a satellite ground user terminal relates to communication means designed for exchanging information between a data network approaching the user terminal and a satellite communication network via an antenna system and a radio module. The utility model solves the problem of providing broadband access to the Internet for individual and collective users; provision of backbone satellite channels for corporate users; provision of dedicated system capacity for VNO operators.

Subscriber terminals (AT) are one of the key functional elements of satellite communication ground stations that ensure the exchange of information between the data transmission network suitable for the AT and the satellite communication network. Modern satellite communication networks are, as a rule, multiservice networks that provide the transmission of heterogeneous traffic in a heterogeneous environment with a single network infrastructure. Such networks make it possible to organize effective traffic management and significantly reduce the cost of operating network equipment, while ensuring the construction of a transparent and productive information infrastructure operating in a single information space, and creating a number of advantages for both subscribers and operators of these networks: the ability access to a satellite resource, both with preliminary allocation of the resource (“fixed” mode) and on demand; a unified way to access any type of information; the ability to dynamically redistribute network resources; support for various protocols for data transmission, voice, video and Internet access.

Known subscriber satellite station for working with multi-beam relay satellites with high throughput, RF patent No. 210172, Application 2021103805, 02/15/2021, IPC H04B 7/02. A subscriber station for receiving and relaying satellite signals, containing an antenna for communication with a relay satellite, which is connected to n radio frequency paths, each of which contains a low noise amplifier (LNA), a power amplifier, down and up converters, through the corresponding inputs/outputs of which, the radio frequency path is connected to the modem, with each modem configured to a given reception frequency of the corresponding local zone; a decision device connected to modems and configured to sum antenna signals received at different frequencies; multiplexer connected to modems and providing signal transmission; a computing device connected to modems and a multiplexer, and configured to set a frequency for transmitting signals by modems and control the output of the multiplexer for transmitting signals to modems.

The disadvantage of the known station is its design in the form of separate devices connected by transitions, the layout of which is different, which reduces maintainability and makes it difficult to change the design options of stations in a single design.

Other satellite subscriber terminals are known (Belov A.S., Aldoshin A.I. and Abakumova A.Yu. Domestic modems of satellite communication earth stations // Elektrosvyaz, 2020, No. 1, P. 27-36), the following types and manufacturers:

1) digital satellite modem M-64, manufactured by FSUE NIIR-LONIIR, St. Petersburg, https://loniir.ru/?page_id=2111;

2) satellite modem MD100SE developed by ZAO RADIAN (St. Petersburg), http://www.radian.spb.ru/;

3) satellite modem SM-2.7M series, manufactured by RADIS Ltd. (Moscow, Zelenograd), http://www.radis.ru/sm.htm;

4) satellite router YAR-1040 SCPC, manufactured by Phoenix Engineering Bureau LLC (Krasnoyarsk);

5) Satellite modem ETRA-MD9L LLC NPP ETRA Plus (Moscow), http://www.etra-plus.ru/component/virtuemart/sputnikovyj-modem-etra-md9l.html;

6) satellite communication station “Stela M” produced by JSC “VISAT-TEL” (Moscow), http://www.vsat-tel.ru/equip.php;

7) satellite communication station “Centaur” produced by OJSC “NPC “Vigstar” (Moscow), https://www.vigstar.ru/stss/centavr-na-2d.html.

The listed satellite user terminals have a common drawback associated with their design in the form of rack-mounted units, monoblocks, printed circuit boards with a high degree of packaging without separating functional modules.

Known is the “Containerized Satellite Communication Station” RF patent No. 2455769, application 2011130946/08, 07.26.2011, authors V.S. Balitsky. etc. The technical result consists in providing the possibility of high-speed transmission/reception of various types of information with the required communication quality and increasing the throughput of communication directions. For this purpose, a containerized satellite communication station contains: an antenna system consisting of an antenna, a rotating bearing with electric power drives and an antenna control controller, a guidance system consisting of a GPS antenna and a GPS receiver, a duplexer, a low-noise amplifier, a receiving frequency converter, an amplifier intermediate frequency (IF), L-band frequency divider, television receiver, channel switch, reference oscillator unit, receiving and transmitting frequency synthesizers, satellite terminal, transmission IF amplifier, transmission frequency converter, power amplifier, transmitter controller, communication network management server, optical cross-connection, information cable input, fiber-optic communication line, wired communication line and communication line for connection through the local telephone network with external subscribers.

One of the disadvantages of a containerized satellite communication station is its design in the form of blocks, which increases the dimensions and makes it difficult to test and diagnose the component blocks and configure stations with different parameters and price indicators.

To solve the existing technical problem of improving the design, the satellite ground user terminal is designed as a multi-module electronic device, which allows testing and diagnostics of modules without disassembling the terminal design and increasing the level of unification in the production of terminals with different parameters in the same design, for example, 1U 19 '.

The technical result is achieved by dividing the structural diagram into functionally complete modules, executed on separate printed circuit boards and placed in the terminal body in guides, on the back of which there are connectors. Access to the modules from the front side of the terminal body is provided by removable screw clamps and convenient handles for removing boards from the guides. The modular design increases the maintainability of the terminal by replacing modules, makes it possible to diagnose individual modules without disassembling the structure, and allows the production of terminals with different parameters with the highest possible unification in the same design, for example, 1U, 19''. For example, a subscriber terminal (AT) in a modular design is available in two versions:

1) AT-100 – the main full-featured version, implementing the maximum possible functions and parameters in full;

2) AT-75 - a simplified design in several respects, but more attractive to consumers, allowing in the future to count on greater demand in the satellite communications market.

In FIG. 1 shows a block diagram of a satellite terrestrial subscriber terminal for satellite communications.

In FIG. Figure 2 shows the appearance of a user terminal with 4 removable modules.

The satellite ground user terminal is designed as a multi-module electronic device. It includes the following functional modules (Fig. 1): analog transceiver module 1; digital data processing module 2; digital control module 3; modules 4-1, 4-2 secondary power supply 4.

Analog transceiver module 1 provides 4 frequency channels of reception/transmission, includes a transmitting converter DAC 1-1, which performs the function of digital-to-analog conversion and quadrature modulator when generating a signal spectrum in the L-band 950-2150 MHz with a bandwidth of 100 MHz, receiving converter ADC 1-2, forming two independent receiving paths and performing the functions of quadrature spectrum transfer to the main frequency band, analog-to-digital conversion and preliminary digital signal processing. The second receiver is used to support Mesh TDMA technology. The FPGA of modem 1-3 implements digital signal processing, encoding/decoding and a connection interface with the transmitting DAC converter 1-1 and the receiving ADC converter 1-2. The output of the analog transceiver module 1 is connected to the input of the digital data processing module 2.

Digital processing module 2 performs network routing functions for Ethernet packets. The basis is a packet processor chip 2-1 and RAM 2-2. ROM 2-3 is used to store configuration data. This microcircuit is controlled from control module 3 via a dedicated interface. The packet processor chip does not have built-in physical layer converters, so external physical layer chips are used to organize electrical Ethernet ports.

Digital control module 3, connected to digital data processing module 2 and to analog transceiver module 1, performs the functions of monitoring and control of the satellite ground-based subscriber terminal. The basis is a 3-1 microcontroller for controlling low-power modes with a core frequency of up to 540 MHz. Works in conjunction with RAM 3-2 with a capacity of 1 GB. ROM 3-3 is used to load and store the operating system image, store configuration data, as well as system software images.

The redundant secondary power supply 4 is designed to consist of a source 4-1 for converting the 220 V AC mains voltage into a DC voltage plus 24 V, which is used to power terminal modules 1, 2 and 3, and a backup source 4-2, powered by a DC source voltage 24 V.

Each module is made on separate printed circuit boards, structurally placed in guides, contains connectors on the rear ends of the boards for interconnecting modules in accordance with the structural diagram and a front panel with screw fasteners for fastening and convenient handles for removing the module from the terminal body for diagnostics, replacement in case of failure, as well as configuring the terminal in the full-featured AT-100 version or the simplified AT-75 version with a lower cost.

Claims (1)

Satellite terrestrial subscriber terminal for satellite communications, made in the form of functionally complete modules on separate printed circuit boards of the same design, placed in the terminal structure in guides, intermodular connection connectors are installed on the back side of the printed circuit boards, and on the front side of the terminal body, each module has a front panel with removable screw fasteners and handles for removing modules from the guides.