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Optical Engineering

Coherent receiver design based on digital signal processing in optical high-speed intersatellite links with M-phase-shift keying
Author(s): Semjon Schaefer; Mark Gregory; Werner Rosenkranz
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Paper Abstract

We present simulative and experimental investigations of different coherent receiver designs for high-speed optical intersatellite links. We focus on frequency offset (FO) compensation in homodyne and intradyne detection systems. The considered laser communication terminal uses an optical phase-locked loop (OPLL), which ensures stable homodyne detection. However, the hardware complexity increases with the modulation order. Therefore, we show that software-based intradyne detection is an attractive alternative for OPLL-based homodyne systems. Our approach is based on digital FO and phase noise compensation, in order to achieve a more flexible coherent detection scheme. Analytic results will further show the theoretical impact of the different detection schemes on the receiver sensitivity. Finally, we compare the schemes in terms of bit error ratio measurements and optimal receiver design.

Paper Details

Date Published: 12 October 2016
PDF: 12 pages
Opt. Eng. 55(11) 111614 doi: 10.1117/1.OE.55.11.111614
Published in: Optical Engineering Volume 55, Issue 11
Show Author Affiliations
Semjon Schaefer, Christian-Albrechts-Univ. zu Kiel (Germany)
Mark Gregory, Tesat-Spacecom GmbH & Co. KG (Germany)
Werner Rosenkranz, Christian-Albrechts-Univ. zu Kiel (Germany)

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