Chlorophyll concentration-based CSK constellation point design for underwater SLIPT with priority on communication performance
Chlorophyll concentration-based CSK constellation point design for underwater SLIPT with priority on communication performance
复制标题
基于叶绿素浓度的水下SLIPT CSK星座点设计，优先考虑通信性能
DOI：
10.1109/wpmc52694.2021.9700409
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发表时间：
2021
期刊：
影响因子：
--
通讯作者：
Habuchi Hiromasa
中科院分区：
文献类型：
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作者：
Kogo Takuma;Kozawa Yusuke;Habuchi Hiromasa
同时进行光波信息和功率传输（SLIPT）是构建灵活的水下网络系统，实现水下可见光通信（UVLC）和水下功率传输的重要手段。本文将色移键控（CSK）作为水下SLIPT（USLIPT）的一种调制方式。最后，提出了基于时分接收机的USLIPT的优化CSK（OCSK）星座点。本文考虑星座设计最大化星座点之间的最小距离，同时减轻总接收电流约束的通信性能优化。在这项研究中，在水下信道的衰减系数推导出叶绿素浓度和每种颜色的波长，和建议的星座点进行了优化，该水下信道。本文分析了OCSK的平均误码率和能量，并与采用开关键控（OOK）的USLIPT进行了性能比较。结果表明，当收发距离为50 m，发射机全宽波束发散角为6 °，接收孔径为0.05 m时，OCSK和OOK对纯海水水质的误差率均小于1，对清澈海水水质的误差率小于OOK。此外，在这种纯海洋条件下，OCSK的收获能量被发现略大于OOK的相同的DC偏置电流值在发射机。
Simultaneous light wave information and power transfer (SLIPT) plays an important role in constructing a flexible underwater network system to achieve both underwater visible light communication (UVLC) and underwater power transfer. In this paper, color shift keying (CSK) is considered as a modulation method of underwater SLIPT (USLIPT). Also, optimized CSK (OCSK) constellation points are presented for USLIPT using time splitting receiver. This paper considers the constellation design to maximize the minimum distance between the constellation points while mitigating total received current constraint for communication performance optimization. In this study, the attenuation coefficient in the underwater channel is derived from the chlorophyll concentration and the wavelength of each color, and the proposed constellation points are optimized for this underwater channel. In this paper, the average bit-error rate and harvested energy are analyzed and evaluated for the OCSK, and the performances are compared with USLIPT with an on-off keying (OOK) using time splitting receiver. The results show that the error rates of OCSK and OOK are less than 1for the water quality of pure sea, and that of OCSK is less than that of OOK for the water quality of clear ocean when the distance between the transmitter and receiver, the full width transmitter beam divergence angle and the receiver aperture diameter are 50 m, 6 degrees and 0.05 m, respectively. Furthermore, in this pure sea condition, the harvest energy of OCSK was found to be slightly greater than that of OOK for the same DC bias current value at the transmitter.