Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 17 of 17 for “"Satellite communication systems"”.
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Uplink multiple access techniques for satellite communication systems
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.
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An analysis of low-earth-orbit-satellite communication systems
There is an ever increasing need for low-cost communication systems in the world. One such system, low-earth-orbit satellites, can provide store-and-forward, as opposed to real time, communication for many earth stations. The advantages and disadvantages of such a system is presented. Material …
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Demodulator techniques in satellite communication systems for direct broadcast systems
… TV receiver designs for Direct Broadcast Systems (DBS) from satellites. The various MAC/Packet schemes intended for DBS applications are described and the international standards that apply to them considered, with particular emphasis on the D2-MAC system. Noise in FM systems is discussed …
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Accurate Prediction of Scintillation Degradation Applicable to Satellite Communication Systems Design
Satellite communication was operated exclusively in C-band prior to 1970. Since then there has been an explosive growth in the demand for telecommunication services that are either only feasible via satellite or very cost effective by that means. This has prompted a steady growth in the utilization …
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A Study of the Effects of Scintillation on Digital Satellite Communication Systems
The growth of satellite communication industry and the need to offer new and better services, to compete with optical fiber systems, have driven the satellite industry to search for higher bandwidth and improved cost of services. Higher frequency bands, such as Ka and V-band, came into play. These …
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Performance modeling and analysis of parallel processing and low earth orbit satellite communication systems
… into the analysis of packet-switched data communication systems. The research described in this dissertation examines performance characteristics of two types of packet-switched data communication systems. The first system to be analyzed operates in a parallel processing environment where …
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Multilayer Micromachined RF MEMS Filters at Ka and L/S Band For On-Board Satellite Communication Systems
… Filters in Multi-layer Technology for Satellite On-board Communication Systems†(MIGNON Project). The main purpose of the project is the design and realization of high performance bandpass filters in the Ka and L/S band for on board applications. The use of modern micromachining …
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Performance of dual polarized site diversity satellite communications systems
Dual polarization allows a communication system to transfer twice as much information as a single polarized communication system, with no increase in the required bandwidth. Site diversity may be used in high frequency satellite communication systems to reduce the effects of attenuation and …
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An open source array antenna toolbox implementation
… point of view, with operational phased array systems implemented as far back as the second World War. In recent times, phased array antenna systems have become much more prevalent, not only in a military context but also increasingly in the commercial space, with array antenna implementations …
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Assessing the technical, economic and policy-centered feasibility of a proposed satellite communication system for the developing world
Satellite communication systems remain one of the most under utilized development mediums in less industrialized countries. This research proposes to establish a low cost satellite communications system tailored specifically for the developing world (+/- 30⁰ latitude). The technical, economic and …
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Archimedean spiral antenna embedded with frequency selective surface for wideband applications
The potential applications such as satellite communication systems, critical military communications, radar warning systems and direction finding systems demand for high gain, uniform unidirectional radiation pattern and wideband antenna ranging from 3.1 GHz to 10.6 GHz. An Archimedean spiral …
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Effective design of multiplexing network for applications in communications satellites
… multiplexing networks are widely used in satellite communication systems. Their performances, such as the insertion loss and rejection between channels, are extremely critical. This research aims at effective design of multiplexing networks for applications in communication satellites …
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Modeling and Analysis of Synchronization Schemes for the TDMA Based Satellite Communication System
… access (TDMA) is becoming more widespread in satellite communications. Although single-carrier (SC) modulation techniques has been mostly employed in the TDMA satellite communication system, multi-carrier modulation techniques, like orthogonal frequency division multiplexing (OFDM), are also …
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A Connection Admission Control Framework for UMTS based Satellite Systems.An Adaptive Admission Control algorithm with pre-emption control mechanism for unicast and multicast communications in satellite UMTS.
… growth in the use of multimedia applications. A satellite system offers great potential for multimedia applications with its ability to broadcast and multicast a large amount of data over a very large area as compared to a terrestrial system. However, the limited transmission capacity along with …
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Mobility Enhancement for Digital Video Broadcast Network Via Satellite
Satellite communication systems have proven to be at the centre of delivering the much-desired high capacity, high-speed and reliable broadband and multimedia communication applications and services. With the emergence of the fifth generation (5G) system and the demand of seamless connectivity, …
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Analysis and design of hybrid leaky-wave antennas loaded with frequency selective surfaces
… requiring high performance and precision, as in satellite communication systems and radar. Specifically, the Lwas considered in this thesis are based on the radiation produced by a leakage wave that propagates through a resonant cavity. These are referred Lwas Fabry-Perot type, by analogy with …