Results 11 to 20 of about 22,923 (213)
Estimation of the SGP4 Drag Term from Two Osculating Orbit States [PDF]
Journal of Astronomy and Space Sciences, 2003 A method for estimating the NORAD SGP4 atmospheric drag term from minimum osculating orbit states, i.e., two osculating orbits, is developed. The first osculating orbit state is converted into the NORAD TLE-type mean orbit state by iterative procedure ...
Byoung-Sun Lee, Jae-Woo Park
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Design and Implementation of the Mission Planning Functions for the KOMPSAT-2 Mission Control Element [PDF]
Journal of Astronomy and Space Sciences, 2003 Spacecraft mission planning functions including event prediction, mission scheduling, command planning, and ground track display have been developed for the KOMPSAT-2 mission operations.
Byoung-Sun Lee, Jae-Hoon Kim
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Analysis of the Motion of a Tether-Perturbed Satellite [PDF]
Journal of Astronomy and Space Sciences, 2003 The motion of each satellite in a tethered satellite system is non-Keplerian in the Earth's gravitational field. In this paper, the tether perturbation force is formulated and compared with the perturbation force due to the Earth's oblateness.
Sungki Cho, Jaehoon Kim
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IEEE Access, 2018 Multicarrier faster-than-Nyquist (MFTN) is a spectral efficient transmission scheme for future communication systems. However, as one of the most important drawbacks of multicarrier transmission systems, the peak-to-average power ratio (PAPR) of MFTN ...
Aijun Liu +5 more
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, 2023 With the incorporation of new innovations enabling digital information transmission and delivery by satellite, Satellite Communication Engineering is an unquestionably comprehensive introduction to satellite communication principles and engineering. One of the most amazing by products of the space missions, satellite communication has significantly ...
Dr. V. SESHA RATNA KUMARI +3 more
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PAPR Reduction of Multicarrier Faster-Than-Nyquist Signals With Partial Transmit Sequence
IEEE Access, 2017 Multicarrier faster-than-Nyquist (MFTN) signaling is a spectral efficient transmission scheme for future communication systems. Similar as general multicarrier signals, the high peak-to-average power ratio (PAPR) is also one of the main drawbacks of MFTN
Siming Peng +3 more
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Hexagonal Multicarrier Faster-Than-Nyquist Signaling
IEEE Access, 2017 Multicarrier faster-than-Nyquist (MFTN) signaling is a spectral efficient modulation scheme for future communication systems. In MFTN signaling, the intersymbol interference (ISI) and intercarrier interference (ICI) are introduced intentionally by the ...
Siming Peng +3 more
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IEEE Access, 2018 High peak-to-average power ratio (PAPR) is one of the common drawbacks of multicarrier signals at the transmitter. In this paper, we investigate the PAPR reduction of spectral efficient multicarrier faster-than-Nyquist (MFTN) signals, where the PAPR ...
Siming Peng +4 more
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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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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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