Noise in Communication Satellite Relay Systems
نویسندگان
چکیده
منابع مشابه
Resource Allocation in Relay-based Satellite and Wireless Communication Networks
Title of Document: RESOURCE ALLOCATION IN RELAYBASED SATELLITE AND WIRELESS COMMUNICATION NETWORKS Hui Zeng, Doctor of Philosophy, 2008 Directed By: Professor John S. Baras, Department of Electrical and Computer Engineering A two-level bandwidth allocation scheme is proposed for a slotted Time-Division Multiple Access high data rate relay satellite communication link to provide efficient and fa...
متن کاملComparing Two-way Relay Protocols for Satellite Communication
Protocols applicable to bidirectional data transfer via satellite between two earth terminals are analyzed with respect to their achievable rate regions, an information-theoretic comparison. Protocols include amplify-forward, requiring no special satellite processing, and several variations of decode-forward, which necessitate satellite demodulation, decoding, and re-encoding. All such protocol...
متن کاملIssues in satellite personal communication systems
In the paper various issues in personal satellite communications are addressed. Basic geostationary and non-geostationary satellite constellations are considered. The narrowband and wideband characterization of the mobile satellite channel and related system implications are discussed. Satellite diversity is presented as a measure to overcome signal shadowing. The capacity of TDMA and CDMA mult...
متن کاملBuilding Obstruction in Satellite Mobile Communication Systems
This paper presents a simple model for the evaluation of obstruction caused by multiple buildings in satellite mobile communication systems, or in high-altitude platform (HAP) coverage. The proposed model can be useful for integration into propagation prediction tools. It is based on the KichhoffHuygens formulation, and includes the effect of ground reflections and reflections on a facing build...
متن کاملAdaptive Noise Reduction in Aircraft Communication Systems
In many military environments, such as fighter jet cockpits, the increasing use of digital communication systems has created a need for robust vocoders and speech recognition systems. However, the high level of ambient noise in such environments makes vocoders less intelligible and makes reliable speech recognition more difficult. One method of enhancing the noise-corrupted speech is adaptive n...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: The Journal of the Institute of Television Engineers of Japan
سال: 1963
ISSN: 1884-9644
DOI: 10.3169/itej1954.17.37