Performance Improvement of OOK Free-Space Optical Communication Systems by Coherent Detection and Dynamic Decision Threshold in Atmospheric Turbulence Conditions

被引：20

作者：

Wang, Zixiong ^{[1
]}

Zhong, Wen-De ^{[1
]}

Yu, Changyuan ^{[2
,3
]}

机构：

[1] Nanyang Technol Univ, Sch Elect & Elect Engn, Singapore 637553, Singapore

[2] Natl Univ Singapore, Dept Elect & Comp Engn, Singapore 117576, Singapore

[3] A STAR Inst Infocomm Res, Singapore 138632, Singapore

来源：

IEEE PHOTONICS TECHNOLOGY LETTERS | 2012年 / 24卷 / 22期

关键词：

Atmospheric turbulence; coherent detection; dynamic decision threshold; free-space optical (FSO); COMPENSATION TECHNIQUES; LINKS; RECEIVERS; DIVERSITY; CHANNEL; PPM;

D O I：

10.1109/LPT.2012.2218652

中图分类号：

TM [电工技术]; TN [电子技术、通信技术];

学科分类号：

0808 ; 0809 ;

摘要：

In this letter, we analyze the performance improvement of on-off-keying free-space optical communication systems in atmospheric turbulence conditions due to coherent detection and the dynamic decision threshold (DDT) scheme. Our analytical results show that the DDT scheme provides a 5.7-dB power reduction for achieving a bit error rate of 10(-3) compared with the conventional fixed decision threshold scheme. In addition, the improvement achieved by the DDT scheme is related to the strength of amplitude and phase fluctuations, not to the power of the local oscillator.

引用

页码：2035 / 2037

页数：3

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