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Optical Engineering

Effect of Doppler shift on differential phase-shift keying receivers using interferometric demodulation and balanced detection in intersatellite laser communication links
Author(s): Fang Zhao; Siyuan Yu; Jing Ma; Liying Tan
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Paper Abstract

Doppler shift due to relative movement between satellites must be taken into consideration in intersatellite laser links. The degradation of differential phase-shift keying (DPSK) receiver performance caused by Doppler shift is assessed. In order to simplify the complexity of the receiver, we discuss conditions that will bring the new design concept for a robust laser communication system in space, which does not require precise active control. When the precise active control has to be used, the impact of frequency drifts relative to optical filter's center frequency becomes evident. Optimum bandwidths of optical filters yielding optimum performance over the entire range of frequency shifts are determined to further improve the receiver performance. The results obtained here will be helpful in the design of DPSK/self-homodying intersatellite laser communication systems.

Paper Details

Date Published: 2 October 2010
PDF: 5 pages
Opt. Eng. 49(10) 105001 doi: 10.1117/1.OE.49.10.105001
Published in: Optical Engineering Volume 49, Issue 10
Show Author Affiliations
Fang Zhao, Harbin Institute of Technology (China)
Siyuan Yu, Harbin Institute of Technology (China)
Jing Ma, Harbin Institute of Technology (China)
Liying Tan, Harbin Institute of Technology (China)

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