Title :
Impact of tracking errors on dual diversity structure over the free space optics links
Author :
Peng Liu ; Song Liu ; Matsumoto, Morio
Author_Institution :
Sch. of Electr. & Electron. Eng., North China Electr. Power Univ., Beijing, China
Abstract :
This paper analyzes the impact of tracking errors on the time diversity structure in relation to beam tracking over free-space optics (FSO) links. The paper proposes a time-diversity scheme with beam tracking introducing a powerfading model for an FSO system that utilizes beam tracking through atmospheric turbulence. Further, the paper derives a closed-form bit error rate (BER) for no-diversity and dual-diversity schemes, taking into account the tracking error, coherence of the diversity signals and photo detector noise. It is shown that time diversity is a clever mitigation technique for improving transmission reliability for the FSO system with beam tracking. Comparing with space diversity, time diversity is cost effective and easy to use in FSO.
Keywords :
atmospheric turbulence; diversity reception; error statistics; optical links; telecommunication network reliability; BER; FSO link; FSO system; atmospheric turbulence; beam tracking; clever mitigation technique; closed-form bit error rate; dual diversity structure; free space optics links; photo detector noise; power-fading model; time diversity structure; tracking errors; transmission reliability; Adaptive optics; Bit error rate; Diversity methods; Optical fiber communication; Optical fibers; Optical receivers; Optical transmitters;
Conference_Titel :
Globecom Workshops (GC Wkshps), 2012 IEEE
Conference_Location :
Anaheim, CA
Print_ISBN :
978-1-4673-4942-0
Electronic_ISBN :
978-1-4673-4940-6
DOI :
10.1109/GLOCOMW.2012.6477748
