Fuzzy Rule-Based Signal Restoration for Wireless Optical Communication of Multi-autonomous Underwater Vehicles
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Fuzzy Rule-Based Signal Restoration for Wireless Optical Communication of Multi-autonomous Underwater Vehicles Yu Hao1 • Yuzong Gu1 • Yanbo Zhang1
Received: 22 February 2020 / Revised: 1 July 2020 / Accepted: 3 August 2020 Taiwan Fuzzy Systems Association 2020
Abstract As a complex process, wireless optical communication of autonomous underwater vehicles (AUVs) is particularly challenging in the complex communication environment. Therefore, the existing control or denoise systems show some limitations for communication system of multi-AUV. It is still difficult to balance between the complexity of underwater environment and the performance of reality or estimation. This paper is about to investigate the possibility of combining this realistic communication environment for AUVs with existing strategies in fuzzy control framework. More specifically, first, a model for underwater wireless optical communication (UWOC) is proposed, then, signal restore model for UWOC based on fuzzy control is developed for simulation and analysis purposes. To illustrate the superiority of the proposed methods, several common denoising methods are experimented and compared together. It is also shown that the fuzzy control for signal restore model can well adapt to the real communication environment, and ensure more efficiency and stabilization. Keywords Underwater wireless optical communication Autonomous underwater vehicles Fuzzy control
1 Introduction With the development and utilization of marine resources, AUV has become the most important tool to meet some special requirements. The group collaboration has great & Yanbo Zhang [email protected] 1
Henan University, Kaifeng, China
significance for the function realization of underwater vehicles, and the collaboration of multi-AUV depends on the information interaction between vehicles, and it among the AUV depends on the information interaction between the vehicles [1]. Through the integration of a variety of information, their parameters such as course, speed, etc., are adjusted. Most studies focused on UWOC as an effective tool for underwater high-speed data transmission, considering that UWOC has replaced the traditional methods such as sonar, ultra-low frequency and so on [2, 3]. Environment of underwater communication is so harsh. During the process of underwater transmission, laser signal will be affected by scattering and absorption, etc., resulting in severe signal attenuation which can affect communication channel greatly [4]. In conclusion, underwater turbulence of optical which is mainly due to the complicacy of underwater environment results in fading of the propagating optical signal. Therefore, it is of great significance to study the characteristics of the UWOC in a complex environment for AUVs. Some prior works focused only on the study of absorption and scattering effects of UWOC channels. The channel turbulence-free impulse response has been simulated and modeled using Monte Carlo simulation methods [5, 6]. Some useful studies have analyzed turbulence
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