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Proceedings Paper

Transmitter diversity based on phase-division
Author(s): Christian Fuchs; Dirk Giggenbach; Ramon Mata Calvo; Werner Rosenkranz
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Paper Abstract

Current satellite communication systems based on RF technology are often limited by the available spectrum. Free-Space Optical Communication Links are a promising solution to overcome this bottleneck. The available spectrum enables Terabit-per-Second data rates, and the point-to-point nature of FSO links makes spectrum regulation unnecessary. Therefore, the use of optical links is investigated in a number of scenarios, as e.g. for GEO feeder links serving multimedia applications. Transmitter Diversity might be a solution to overcome atmospheric impacts on the ground-to-satellite transmission in an optical GEO feeder link application. Transmitter Diversity can e.g. be implemented by using various spectral channels. Despite the virtually unlimited bandwidth available in atmospheric transmission windows, practical implementations of an optical GEO feeder link need to use available hardware, namely fiber amplifiers in the C- and L-band – Therefore, a more efficient use of the available spectrum will enable in a higher system throughput. In this paper, we present a bandwidth efficient transmitter diversity scheme, called "phase-division in bit-time". It is based on Intensity Modulation with Direction Detection, and makes use of phase modulation for the transmitters to mitigate the impact of atmospheric phase distortions on the quality of the received signal.

Paper Details

Date Published: 4 March 2019
PDF: 8 pages
Proc. SPIE 10910, Free-Space Laser Communications XXXI, 1091018 (4 March 2019); doi: 10.1117/12.2511636
Show Author Affiliations
Christian Fuchs, Deutsches Zentrum für Luft- und Raumfahrt e.V. (Germany)
Dirk Giggenbach, Deutsches Zentrum für Luft- und Raumfahrt e.V. (Germany)
Ramon Mata Calvo, Deutsches Zentrum für Luft- und Raumfahrt e.V. (Germany)
Werner Rosenkranz, Christian-Albrechts-Univ. zu Kiel (Germany)

Published in SPIE Proceedings Vol. 10910:
Free-Space Laser Communications XXXI
Hamid Hemmati; Don M. Boroson, Editor(s)

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