Mitigation of turbulence-induced scintillation noise in free-space optical links using temporal-domain detection techniques

Author

Zhu, Xiaoming ; Kahn, Joseph M. ; Wang, Jin

Author_Institution

Dept. of Electr. Eng. & Comput. Sci., Univ. of California, Berkeley, CA, USA

Volume

15

Issue

4

fYear

2003

fDate

4/1/2003 12:00:00 AM

Firstpage

623

Lastpage

625

Abstract

Atmospheric turbulence-induced intensity fluctuations can significantly impair the performance of free-space optical links. Temporal-domain detection techniques can be applied to mitigate these intensity fluctuations. If the receiver has knowledge of the joint temporal statistics of intensity fluctuations, maximum-likelihood sequence detection (MLSD) or pilot-symbol assisted detection (PSAD) can be employed. We experimentally demonstrate the effectiveness of these techniques in a 500-m terrestrial link using ON-OFF keying, where MLSD and PSAD yield signal-to-noise ratio gains of 2.4 and 1.9 dB, respectively.

Keywords

amplitude shift keying; atmospheric light propagation; atmospheric turbulence; fluctuations; maximum likelihood detection; optical links; optical modulation; optical noise; scintillation; statistics; 1.9 dB; 2.4 dB; 500 m; ON-OFF keying; atmospheric turbulence-induced intensity fluctuations; free-space optical links; intensity fluctuations; joint temporal statistics; maximum-likelihood sequence detection; pilot-symbol assisted detection; receiver; signal-to-noise ratio gains; temporal-domain detection techniques; terrestrial link; turbulence-induced scintillation noise; Apertures; Fluctuations; Maximum likelihood detection; Noise reduction; Optical fiber communication; Optical noise; Optical receivers; Optical refraction; Signal detection; Solid scintillation detectors;

fLanguage

English

Journal_Title

Photonics Technology Letters, IEEE

Publisher

ieee

ISSN

1041-1135

Type

jour

DOI

10.1109/LPT.2003.809305

Filename

1190224