title: Theoretical and experimental studies of turbo product code with time diversity in free space optical communication.
abstract: In free space optical communication (FSOC) systems, channel fading caused by atmospheric turbulence degrades the system performance seriously. However, channel coding combined with diversity techniques can be exploited to mitigate channel fading. In this paper, based on the experimental study of the channel fading effects, we propose to use turbo product code (TPC) as the channel coding scheme, which features good resistance to burst errors and no error floor. However, only channel coding cannot cope with burst errors caused by channel fading, interleaving is also used. We investigate the efficiency of interleaving for different interleaving depths, and then the optimum interleaving depth for TPC is also determined. Finally, an experimental study of TPC with interleaving is demonstrated, and we show that TPC with interleaving can significantly mitigate channel fading in FSOC systems.
authors.affiliation: State Key Laboratory of Advanced Optical Communication Systems and Networks, School of Electronics Engineering and Computer Science, Peking University, Beijing, China.
authors.forename: Yaoqiang
authors.initials: Y
authors.lastname: Han
authors.forename: Anhong
authors.initials: A
authors.lastname: Dang
authors.forename: Yongxiong
authors.initials: Y
authors.lastname: Ren
authors.forename: Junxiong
authors.initials: J
authors.lastname: Tang
authors.forename: Hong
authors.initials: H
authors.lastname: Guo
mesh_terms: D001272:Atmosphere; D017076:Computer-Aided Design; D004867:Equipment Design; D019544:Equipment Failure Analysis; D055096:Optical Devices; D013685:Telecommunications / Q000295:instrumentation*