A Parallel Decoding Algorithm for Short Polar Codes Based on Error Checking and Correcting
The Scientific World Journal, 2014 We propose a parallel decoding algorithm based on error checking and correcting to improve the performance of the short polar codes. In order to enhance the error-correcting capacity of the decoding algorithm, we first derive the error-checking equations
Yingxian Zhang +4 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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A Hybrid Beamforming Design for Massive MIMO LEO Satellite Communications [PDF]
Frontiers in Space Technologies, 2021 5G and future cellular networks intend to incorporate low earth orbit (LEO) satellite communication systems (SatCom) to solve the coverage and availability problems that cannot be addressed by satellite-based or ground-based infrastructure alone.
J. Palacios +4 more
semanticscholar +1 more source
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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Design of Satellite Operations Subsystem Using Dynamic Fault Management Mechanism [PDF]
Journal of Astronomy and Space Sciences, 1998 Satellite Operations Subsystem in the Mission Control Element provides real-time monitoring of the satellite status and transmits telecommands to control the satellite during the contact time.
Jaehoon Kim, Heesook Mo, Woonchan Jung
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Design and Implementation of Hitl Simulator Coupleing Communications Payload and Software Spacecraft Bus [PDF]
Journal of Astronomy and Space Sciences, 2003 Engineering qualification model payload for a communications and broadcasting satellite(CBS) was developed by ETRI from May, 2000 to April, 2003. For the purpose of functional test and verification of the payload, a real-time hardware-in-the-loop(HITL ...
In-Jun Kim, Wan-Sik Choi
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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
NORAD TLE Type Orbit Determination of LEO Satellites Using GPS Navigation Solutions [PDF]
Journal of Astronomy and Space Sciences, 2002 NORAD Two Line Elements (TLE) are widely used for the increasing number of small satellite mission operations and analysis. However, due to the irregular periodicity of generation of the NORAD TLE, a new TLE that is independent of NORAD is required.
Chang-Hwa Cho +4 more
doaj +1 more source
EAI Endorsed Transactions on Mobile Communications and Applications, 2017 The state of insecurity occasioned by fraudulent practices in Africa has been of concern economically, both at home and abroad. In this paper, we propose ways to mitigate this problem, using Nigeria as a case study.
M.I. Adeka +8 more
doaj +1 more source
Analytical Study on Mission Control Element System Availability for Korea Multipurpose Satellite (KOMPSAT) I [PDF]
Journal of Astronomy and Space Sciences, 1998 To estimate the availability of the MCE for KOMPSAT I, mathematical models of H/W and S/W availability, the availability estimating methods for parallel and redundant system were presented. Furthermore, to improve and estimate the MCE system availability,
J. W. Eun, D. I. Chang, J. M. Kim
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