منابع مشابه
Optical Intersatellite Communication Links
The performance of direct and hetedyne detection optical intersatellite communication links are evaluated and compared. It is shown that the perfonnance of optical links is very sensitive to the pointing and tracking e m at the transmitter and receiver. In the presence of random pointing and tracking errors, optimal antenna gains exist that wiU minimize the required transmitter power. In additi...
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LEOS communication systems are rapidly moving from dream to reality. When operational, the LEOS systems can offer mobile and fixed-site communications between any two points on the globe. Yet, many LEOS system design issues remain unresolved. Some of the planned systems, such as Iridium and Teledesic, rely on intersatellite communication to provide space based routing from origin to destination...
متن کاملTime Slot Assignment in SS/TDMA Systems with Intersatellite Links
In this paper we study the time slot assignment problem in clusters of SS/TDMA satellite systems interconnected through intersatellite links,. We show that the problem of finding an assignment which minimizes.,-the total transmission time is NP-complete, Le., computationally intractable, even for quite restricted intersatellite link patterns and simplified system models. Successively, we focus ...
متن کاملFree-Space Optical Quantum Key Distribution Using Intersatellite Links
Communication schemes employing quantum entanglement open a wide field of possible applications with properties outperforming their classical counterparts. Promising examples are quantum key distribution, quantum dense coding, and quantum state teleportation. We investigate the potential of quantum cryptography, i.e. quantum key distribution (QKD), with special emphasis on the demands and oppor...
متن کاملAtmospheric occultation of optical intersatellite links: coherence loss and related parameters.
The Rytov theory is applied to find the wave structure function of a laser beam transmitted from one satellite to another and propagating through the turbulent atmosphere. The phase-screen approximation is used. Taking into account refractive-index anisotropy, outer scale, and atmospheric mean-refraction defocusing, we provide expressions of the wave structure function for a spherical wave. The...
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ژورنال
عنوان ژورنال: International Journal of Satellite Communications
سال: 1988
ISSN: 0737-2884,1099-1247
DOI: 10.1002/sat.4600060203