A Novel Low-Complexity High-Order DPSK System With Constellation Reconstruction for FSO Communication

被引：2

作者：

Song, Song ^{[1
,2
]}

Wu, Junxian ^{[1
,2
]}

Liu, Yejun ^{[1
,2
]}

Guo, Lei ^{[1
,2
]}

机构：

[1] Chongqing Univ Posts & Telecommun, Sch Commun & Informat Engn, Chongqing 400000, Peoples R China

[2] Chongqing Univ Posts & Telecommun, Inst Intelligent Commun & Network Secur, Chongqing 400000, Peoples R China

来源：

IEEE WIRELESS COMMUNICATIONS LETTERS | 2022年 / 11卷 / 10期

基金：

中国国家自然科学基金;

关键词：

Differential phase shift keying; Modulation; Optical modulation; Demodulation; Optical filters; Optical pulses; Complexity theory; Free space optical; differential phase shift keying; constellation reconstruction;

D O I：

10.1109/LWC.2022.3191659

中图分类号：

TP [自动化技术、计算机技术];

学科分类号：

0812 ;

摘要：

Free Space Optical (FSO) communication has been widely studied because of its advantages such as rich spectrum resource, high transmission capacity, high security, low power consumption and flexible installation. However, FSO link is sensitive to weather conditions and atmospheric turbulence, which poses a great challenge on signal transmission quality. Differential Phase Shift Keying (DPSK) modulation is well recognized as a promising technique to deal with the inter-symbol interference due to channel fading. Nevertheless, the existing system structure for high-order DPSK modulation technology is too complex to be used in practice for FSO system. Therefore, this letter proposes a simplified DPSK modulation scheme. In order to alleviate signal transmission performance degradation caused by simplification, a constellation remapping method is employed in the proposed scheme to achieve flexible signal transmission and improve the Bit Error Rate (BER) performance. It is demonstrated that compared with the traditional DPSK system, the proposed scheme significantly reduces the system complexity and has better BER performance under low to moderate atmospheric turbulence.

引用

页码：2031 / 2035

页数：5

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