Name: Analysis of Fade Detection and Compensation Experimental Results in a Ka-Band Satellite System (en Inglés)
Price: 299825.00 COP
Availability: InStock
Author: National Aeronautics and Space Administr ; Johnson, Sandra
ISBN: 9781288910472

portada Analysis of Fade Detection and Compensation Experimental Results in a Ka-Band Satellite System (en Inglés)

Formato

Libro Físico

Autor

National Aeronautics and Space Administr

Sandra Johnson

Editorial

Biblioscholar

Idioma

Inglés

N° páginas

Encuadernación

Tapa Blanda

Dimensiones

24.6 x 18.9 x 0.5 cm

Peso

0.19 kg.

ISBN13

9781288910472

Categorías

Educación

Analysis of Fade Detection and Compensation Experimental Results in a Ka-Band Satellite System (en Inglés)

National Aeronautics and Space Administr (Autor) · Sandra Johnson (Autor) · Biblioscholar · Tapa Blanda

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Reseña del libro "Analysis of Fade Detection and Compensation Experimental Results in a Ka-Band Satellite System (en Inglés)"

The frequency bands being used for new satellite communication systems are constantly increasing to accommodate the requirements for additional capacity. At these higher frequencies, propagation impairments that did not significantly affect the signal at lower frequencies begin to have considerable impact. In Ka-band, the next logical commercial frequency band to be used for satellite communication, attenuation of the signal due to rain is a primary concern. An experimental satellite built by NASA, the Advanced Communication Technology Satellite (ACTS), launched in September 1993, is the first US communication satellite operating in the Ka-band. In addition to higher carrier frequencies, a number of other new technologies, including onboard baseband processing, multiple beam antennas, and rain fade detection and compensation techniques, were designed into the ACTS. Verification experiments have been conducted since the launch to characterize the new technologies. The focus of this thesis is to describe and validate the method used by the ACTS Very Small Aperture Terminal (VSAT) ground stations in detecting the presence of fade in the communication signal and to adaptively compensate for it by the addition of burst rate reduction and forward error correction. Measured data obtained from the ACTS program is used to validate the compensation technique. In this thesis, models in MATLAB are developed to statistically characterize the increased availability achieved by the compensation techniques in terms of the bit error rate time enhancement factor. Several improvements to the ACTS technique are discussed and possible implementations for future Ka-band systems are also presented.