Performance of heterodyne differential phase-shift-keying underwater wireless optical communication systems in gamma-gamma-distributed turbulence.
Performance of heterodyne differential phase-shift-keying underwater wireless optical communication systems in gamma-gamma-distributed turbulence.
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DOI：
10.1364/ao.57.002057
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发表时间：
2018-03
期刊：
影响因子：
1.9
通讯作者：
Yuqing Fu;Yongzhao Du
中科院分区：
文献类型：
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作者：
Yuqing Fu;Yongzhao Du
推导了外差差分相移键控水下无线光通信（UWOC）系统的平均误码率和中断概率的解析表达式，并适当考虑了吸收、散射和相干衰落等信道退化效应。球形波的闪烁指数的评估，以量化的水下系统的性能在强湍流制度。球面波在水下强湍流环境中的传播模型为伽玛-伽玛分布。然后，针对水下湍流的各种变化，即，每单位质量流体的动能耗散率、温度与盐度对折射率谱的贡献的比率以及UWOC系统链路长度。结果表明，所建立的系统性能解析表达式是有效的。
The analytical expressions for the average bit error rate and the outage probability of a heterodyne differential phase-shift-keying underwater wireless optical communication (UWOC) system are derived with proper consideration of all of the channel-degrading effects, including absorption, scattering, and turbulence-induced fading. The scintillation index of a spherical wave is evaluated in order to quantify the underwater system performance in a strong turbulence regime. The spherical wave propagating through the strong underwater turbulence environment is modeled as gamma-gamma distribution. Then, the system performance is simulated for various variations of the underwater turbulence, i.e., the rate of dissipation of kinetic energy per unit mass of fluid, the ratio of temperature to salinity contributions to the refractive index spectrum, and the UWOC system link length. The results show that the analytical expressions for describing the system performance are valid.