Open AccessTheoretical and experimental studies of turbo product code with time diversity in free space optical communication
Author(s) -
Yinghua Han,
Anhong Dang,
Yongxiong Ren,
Jian Tang,
Hong Guo
Publication year - 2010
Publication title -
optics express
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.394
H-Index - 271
ISSN - 1094-4087
DOI - 10.1364/oe.18.026978
Subject(s) - interleaving , fading , time diversity , computer science , turbo code , electronic engineering , channel (broadcasting) , free space optical communication , diversity scheme , forward error correction , burst error , decoding methods , telecommunications , optical communication , engineering
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.