Limited length coding and improved energy detection for underwater photoelectric signal recovery

Wenjiao Liu; Yi Yang; Lilin Meng; Yunzhou Zhu; Zhuo Gao

doi:10.1117/1.OE.58.5.053104

24 May 2019 Limited length coding and improved energy detection for underwater photoelectric signal recovery

Wenjiao Liu, Yi Yang, Lilin Meng, Yunzhou Zhu, Zhuo Gao

Author Affiliations +

Optical Engineering, Vol. 58, Issue 5, 053104 (May 2019). https://doi.org/10.1117/1.OE.58.5.053104

Abstract

In underwater wireless optical communications (UWOC), low signal-to-noise ratio (SNR) and baseline drift problems caused by the attenuation of seawater channels and limited bandwidth of the transceiver system deteriorate the quality of the received signal and result in a higher bit error rate (BER). The transmission characteristics of underwater optical communication systems are analyzed, and a scheme combining length-limited coding and improved energy detection is proposed to improve the detection performance under low SNR and baseline drift. Experiments show that the scheme can improve the performance of the intensity-modulated direct-detection nonreturn-to-zero UWOC system. The BER performance of 3 × ^{10 − 4} can be achieved at SNR = 5.14 dB, which lays the foundation for long-distance UWOC.

Citation Download Citation

Wenjiao Liu, Yi Yang, Lilin Meng, Yunzhou Zhu, and Zhuo Gao "Limited length coding and improved energy detection for underwater photoelectric signal recovery," Optical Engineering 58(5), 053104 (24 May 2019). https://doi.org/10.1117/1.OE.58.5.053104

Received: 1 February 2019; Accepted: 19 April 2019; Published: 24 May 2019

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