Title :
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
fDate :
4/1/2003 12:00:00 AM
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;
Journal_Title :
Photonics Technology Letters, IEEE
DOI :
10.1109/LPT.2003.809305
