Results 1 to 10 of about 427,008 (187)
A Review of the Applications of Artificial Intelligence in Improving the Performance of Integrated Space-Air and Ground Networks [PDF]
فصلنامه علوم و فناوری فضایی, 2023 According to the technical specifications of the future generations of telecommunication (the fifth generation and later), which should provide new services with very high data rates in the minimum time and a wide coverage, as well as the exponential ...
Pedram Hajipour +4 more
doaj +1 more source
Determining Allowed Positions of Aeronautical-Earth Station in Motion (A-ESIM) Prevent its Frequency Interference in the Fixed Ground Station [PDF]
فصلنامه علوم و فناوری فضایی, 2023 Aeronautical-ESIM (A-ESIM) provides a satellite broadband service for aircraft occupants. Due to the frequency sharing of Aeronautical-ESIM (A-ESIM) satellite broadband service with previous ones, there is a possibility of its frequency interference on ...
Roghayeh Doost +3 more
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Investigating the Test and Evaluation of GaN Transistors Radiation Resistance in SSPA Amplifier Board in LEO Satellite Payload [PDF]
فصلنامه علوم و فناوری فضایی, 2023 With the advent of GaN technology, achieving microwave power with high efficiency by solid-state devices has become more available. Therefore, the use of SSPA amplifiers with GaN technology in satellites, especially LEO satellites, has been considered ...
Roghieh Karimzadeh Baee +3 more
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Using Space Radiation Shielding Made of Polyethylene Instead of Aluminum in GEO Orbit to Reduce Weight [PDF]
فصلنامه علوم و فناوری فضایی, 2023 One of the damaging factors for the proper functioning of telecommunication payloads are high energy ionizing particles in space, which the use of proper shield is a way to deal with it.
Pedram Hajipour +5 more
doaj +1 more source
Communications Satellite System by Using Moon Orbit Satellite Constellation [PDF]
Journal of Astronomy and Space Sciences, 2003 A communications satellite system placed in three-Lagrange points, L3, L4, and L5, of the restricted three-body problem in Earth-Moon system is proposed in this paper. LEO satellite constellation has been another choice of communications system.
Sanguk Lee, Jae Hoon Kim, Seong-Pal Lee
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Sensors, 2021 In this paper, a simple printed cross-dipole (PCD) antenna to achieve a right-hand circular polarization (RHCP) at the L/S-band for direction finding (DF) systems is presented.
Kyei Anim +5 more
doaj +1 more source
Remote Sensing, 2022 The radio determination service system (RDSS), a navigation and positioning system independently developed by China, features services such as short-message communication, position reporting, and international search and rescue.
Xiaojie Li +7 more
doaj +1 more source
Design and Realization of Universal Data Interface [PDF]
Journal of Astronomy and Space Sciences, 2005 KARI studied data interface of Space Applications for developing Space Experimental Instrument in International Space Station, designed, and manufactured the UDIS (International Sapce Station Universal Data Interface simulator) according to requirements ...
Jong-Woo Kim +2 more
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Gap Analysis in Satellite Communication Services [PDF]
فصلنامه علوم و فناوری فضایی, 2023 The national information network is being implemented with the aim of providing the services needed by the people through internal infrastructure and independent of international internet platforms.
Leila Mohammadi +3 more
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EURASIP Journal on Wireless Communications and Networking, 2008 The call for papers resulted in a high number of submis- sions, from which we have been able to select 12 excellent papers dealing with the different aspects of satellite commu- nications and navigation. Multiple-input multiple-output (MIMO) techniques are attracting a considerable amount of attention from within the terrestrial wireless community. The
Sheriff, Ray E +2 more
openaire +3 more sources