High-speed Radio Links Research Articles

Features of the use of directional fixed antennas of a high-speed radio link on a small spacecraft AIST-2T

The correct installation of antenna-feeder devices on board a small spacecraft and the choice of their parameters make it possible to ensure the solution of target problems with high quality. The main problematic issues of placement of antenna-feeder devices of the on-board equipment of the radio link for the transmission of target information on the SSC “AIST-2T” and the adopted design solutions are considered.

Comparative analysis of options for constructing an antenna array of onboard high-speed radio link equipment

Comparative analysis of options for constructing an antenna array of onboard high-speed radio link equipment

Development of a Technological Module for Control and Verification of on-Board Equipment for Storing Temporary Data

High-speed radio link HSRL is designed to transmit target information from spacecraft equipment to the ground. A block of onboard equipment for storing temporary data OESTD is a part of the onboard equipment of a high-speed radio link OEHSRL. Before the spacecraft is launched into space, acceptance tests of the input control are carried out. To do this, it was necessary to develop testing equipment TE and software for it. TE of OESTD is designed to check the OESTD in general and each block in particular during autonomous tests. This paper considers the subsystem of technological software - a component of the TE software system, which allows checking the operation of the FPGA as part of the OESTD. The subsystem main algorithms and functions performed by the subsystem are given. The interaction of the operator of control and testing equipment with programmable logic integrated circuits FPGA, which are part of the on-board equipment block for storing temporary data of the OESTD, is considered. Debugging software is required to enable this interaction. An FPGA with the RISC-V architecture was chosen, debugging via GRMON turned out to be impossible and OpenOCD was chosen. As a result, a technological software module was developed for testing and ensuring the operability of the FPGA as part of the onboard equipment for storing temporary data. The following components were developed: a subsystem for interaction with the device to ensure the ability to send commands and receive response messages, service functions to convert response messages into a readable form for the operator, a subsystem for interaction of the module with the main frame of the TE software, and widgets to provide the ability to manually enter commands from the user conveniently.

Особенности расчета и проектирования высокоскоростных радиолиний космических аппаратов ДЗЗ

Особенности расчета и проектирования высокоскоростных радиолиний космических аппаратов ДЗЗ

Особенности расчета и проектирования высокоскоростных радиолиний космических аппаратов ДЗЗ

Особенности расчета и проектирования высокоскоростных радиолиний космических аппаратов ДЗЗ

Повышение точности оценки длительности сеансов связи космических аппаратов дистанционного зондирования Земли с наземными пунктами приёма информации для надёжных высокоскоростных радиолиний

Повышение точности оценки длительности сеансов связи космических аппаратов дистанционного зондирования Земли с наземными пунктами приёма информации для надёжных высокоскоростных радиолиний

Методы проектирования и аппаратной реализации цифровых фильтров для высокоскоростной радиолинии в системах ДЗЗ

Методы проектирования и аппаратной реализации цифровых фильтров для высокоскоростной радиолинии в системах ДЗЗ

Simulation of a high‐speed radio link under OPNET

AbstractA high‐speed radio link, such as the LMDS (local multipoint distribution system), proves to be quite complex to simulate under OPNET modeler radio from the electromagnetic propagation point of view. This paper describes the introduction of a 3‐D radiation diagram in the simulation and integration of software computing the electromagnetic propagation, taking note of the multipath. © 2001 John Wiley & Sons, Inc. Microwave Opt Technol Lett 31: 24–27, 2001.