各向异性海洋湍流DHPIM无线光通信性能分析  

Performance of Double-headed Pulse Interval Modulated Wireless Optical Communication System in Anisotropic Ocean Turbulence

作　　者：张建磊 和晗昱 聂欢 邱晓芬 李佳琪 杨祎 贺锋涛 ZHANG Jianlei;HE Hanyu;NIE Huan;QIU Xiaofen;LI Jiaqi;YANG Yi;HE Fengtao(School of Electronic Engineering,Xi′an University of Posts and Telecommunications,Xi′an 710121,China)

机构地区：[1]西安邮电大学电子工程学院,西安710121

出　　处：《光子学报》2022年第4期79-91,共13页Acta Photonica Sinica

基　　金：国家自然科学基金(No.61805199);陕西省技术创新引导专项基金(No.2020TG-001);西安邮电大学研究生联合培养工作基地(No.YJGJ201905)。

摘　　要：水下无线光通信系统易受由折射率波动起伏引起的海洋湍流的影响,造成光强闪烁、光束漂移、光束扩展和波前畸变等效应,从而使光信号产生衰落,导致通信质量降低及通信性能恶化。利用扩展的惠更斯-菲涅耳原理和渐近Rytov理论分别导出有限尺寸探测器的平均接收光功率和辐照度通量方差,研究了Gamma-Gamma湍流信道模型下双头脉冲间隔调制的高斯光束在各向异性海洋湍流中的误包率性能。分析了在不同的各向异性海洋湍流下,海洋湍流参数(温度方差耗散率、湍流动能耗散率、温度与盐度波动对功率谱贡献大小的比值)、比特分辨率、比特传输速率、光电探测器的响应度以及链路距离对误包率的影响,为降低双头脉冲间隔调制下高斯光束的误包率性能提供了理论依据。The ocean is abundant in chemical and power resources,it is the space for human survival and development. Underwater Wireless Communication (UWC) technology realizes the wireless transmission of ocean exploration information,and has received extensive attention from researchers in recent years.Currently,radio frequency communication technology and acoustic communication technology are two comparatively mature technologies in seawater communications,in which the problems conceal. In the radio frequency communication,the large volume of transceiver,the high cost and energy consumption,and the rapidly attenuated radio wave underwater would make it impossible to achieve long-distance transmission and high-speed underwater communication. As for the acoustic communication technology,its large-size equipment,high power consumption,low transmission rate,limited available bandwidth,and severe multipath effects during transmission,would cause speed limits of the data transmission and the increase in bit error rate. With the advantages of no electromagnetic radiation,fast speed,strong mobility,good safety, high bandwidth and green environmental protection, the underwater wireless optical communication has become a new choice for underwater sensor data transmission and acquisition of marine monitoring information,thus playing a paramount role in the detection in underwater environments and development of marine resources. Specifically,the lower loss of blue-green light caused by seawater absorption and scattering can help to reach the underwater transmission rate as Gbit/s. Therefore,bluegreen light is used to carry information to realize long-distance underwater transmission. However,as the light beam propagating in seawater,not only will it be affected by the attenuation effect of the absorption and scattering of the seawater impurities,but also easily affected by ocean turbulence caused by fluctuations in refractive index. Ocean turbulence will lead to a series of problems,including light intensity flicker,beam drift,beam

关 键 词：水下无线光通信 误包率 双头脉冲间隔调制 Gamma-Gamma各向异性海洋湍流 高斯光束 

分 类 号：TN252[电子电信—物理电子学]