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 20 of 64 for “"Satellite communication"”.
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Portable optical ground stations for satellite communication
Small satellite technical capabilities continue to grow and launch opportunities are rapidly expanding. Several commercial constellations of small satellites for Earth observation and communications are making their way onto orbit, increasing the need for high bandwidth data downlink. Laser …
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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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Random Access Satellite Communication in the Presence of Interference
This thesis explores a random access service for satellites with the possibility of unintentional or intentional interference. Previous work does not address large bandwidth-delay product systems and interference. This thesis combines the challenges of each, developing a methodology for modeling …
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Advanced satellite communication technology for oceanic air traffic control
Thesis (M. Eng.)--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
… 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 and a suitable …
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The dynamic behavior of rain attenuation on satellite communication links
The proposed use of communication satellites operating above 10 GHz has stimulated research into the effects of atmospheric rain and ice on the reception of these signals. This thesis examines the statistics of fade rate, fade duration, and interface intervals on 19 and 28 GHz communication links, …
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Viability of High Availability Kband Satellite Communication using Hybrid Fade Mitigation
The C and Ku bands that have been the backbone of satellite telephony and data networks in the past are limited in the amount of bandwidth they provide. Consequently, some broadband Internet services have started to move into the Ka band in order to utilise the bandwidth at these higher …
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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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Pointing system performance analysis for optical inter-satellite communication on CubeSats
Free-space optical communication using lasers (lasercom) is a leading contender for future space-based communication systems with potential advantages over radio frequency (RF) communication systems in size, weight, and power consumption (SWaP). Key benefits are due to the shorter wavelength: …
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Control of a fast steering mirror for laser-based satellite communication
… platform capable of sending and receiving laser communication signals in space from Mars. The two main components of the pointing system on the spacecraft include an inertial reference frame to provide coarse laser control and a Fast Steering Mirror to remove any spacecraft jitter from the …
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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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Parameterized analysis of optical inter-satellite links for high resolution satellite communication
… spatial information in single and multi-user RF communication receivers is well established for reducing interference and enabling frequency reuse. Antenna arrays have been deployed in single satellite applications but arrays have not been exploited in multi-satellite constellations where …
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Overhead channel power control in a low earth orbit satellite communication system
Thesis (M.Eng.)--Massachusetts Institute of Technology, Dept. of Electrical Engineering and Computer Science, 1998.
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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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Performance of turbo coded DS-CDMA systems in correlated and uncorrelated satellite communication channels
… turbo codes in the correlated and uncorrelated satellite fading channel. Turbo codes are known to give very good perfonnance results in A WGN channels, especially for very large input message length codes or interleaver sizes. It can be shown that good perfonnance of the turbo codes can be …
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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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A Back Propagation Based Spiking Neural Network Approach for Intelligent Link Decisions In Satellite Communication
… metrics. Such results can be appealing for satellite networks with orbital operations involving either stationary or manned aids, which would provide directions for autonomy in CN decisions. The satellite on-board processing capabilities, traditionally, have been a limiting factor for …
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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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