Special Section on Free-Space Laser Communication

Coherent receiver design based on digital signal processing in optical high-speed intersatellite links with M-phase-shift keying

[+] Author Affiliations
Semjon Schaefer, Werner Rosenkranz

Christian-Albrechts-Universität zu Kiel, Chair for Communications, Kaiserstraße 2, D-24143 Kiel, Germany

Mark Gregory

TESAT-Spacecom GmbH & Co.KG, Gerberstraße 49, D-71522 Backnang, Germany

Opt. Eng. 55(11), 111614 (Oct 12, 2016). doi:10.1117/1.OE.55.11.111614
History: Received May 14, 2016; Accepted September 15, 2016
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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.

© 2016 Society of Photo-Optical Instrumentation Engineers

Citation

Semjon Schaefer ; Mark Gregory and Werner Rosenkranz
"Coherent receiver design based on digital signal processing in optical high-speed intersatellite links with M-phase-shift keying", Opt. Eng. 55(11), 111614 (Oct 12, 2016). ; http://dx.doi.org/10.1117/1.OE.55.11.111614


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