正交调幅
多输入多输出
计算机科学
电子工程
信号(编程语言)
信号处理
湍流
卡姆
数字信号处理
物理
声学
光学
电信
计算机硬件
误码率
频道(广播)
工程类
热力学
程序设计语言
作者
Mandeep Singh,Maninder Singh,Rajandeep Singh
出处
期刊:Optik
[Elsevier]
日期:2022-03-01
卷期号:259: 168986-168986
被引量:3
标识
DOI:10.1016/j.ijleo.2022.168986
摘要
Underwater applications like real-time marine observations, video streaming, communication between underwater sensor nodes require spectrally efficient, high-speed (>100 Gbps) and reliable wireless links. In this paper, a coherently detected dual-polarization (DP)-16 quadrature amplitude modulation (QAM) based system is proposed for turbulent underwater wireless optical communication (UWOC) which can transmit a data rate of 112 Gbps. The integration of digital signal processing (DSP) with a coherent system enables error-free transmission at longer distances. The proposed single-input single-output (SISO) system achieves reliable link ranges of 150 m, 55 m, 24 m, 10 m, and 5.5 m under the pure sea, clear ocean, coastal ocean, harbor I, and harbor II water conditions. Furthermore, spatial diversity with multiple-input multiple-output (MIMO) techniques is utilized to mitigate turbulence-induced losses and path losses. At the receiver, the multiple received MIMO branches are combined with the equal gain combining (EGC) method. The transmission range improvements have been observed with 2 × 2 MIMO and 3 × 3 MIMO techniques over the SISO UWOC system. The power budget enhancement of 6 dBm is observed by utilizing a 3 × 3 MIMO configuration over 1 × 1 SISO configuration, and 3 dBm power budget enhancement has been observed in the case of a 2 × 2 MIMO configuration over 1 × 1 SISO configuration. The proposed system can further be utilized in real ocean scenarios to transmit time-sensitive information among diverse underwater sensor nodes.
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