The current work investigates the outage probability of a vertical diffused line-of-sight underwater optical wireless communication link where a fixed transmitter at the sea surface communicates with a receiver floated below sea level, which may be still but randomly placed at a given location or moving following the random waypoint model. In both considered scenarios, the channel gain follows a random distribution making the problem mathematically challenging. Novel mathematical expressions are derived for the channel gain statistics for either random placement and mobility effects. Afterward, the signal-to-noise ratio statistics are extracted, assuming indirect modulation/direct detection at the receiver. Hence, the outage probability and the average bit-error-rate for on–off keying are readily calculated. Finally, some relevant numerical results are depicted in a series of figures to highlight the overall performance.

中文翻译：

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具有随机放置或移动接收器的水下光无线链路的性能

目前的工作调查垂直扩散视线水下光无线通信链路的中断概率，其中海面的固定发射器与漂浮在海平面以下的接收器通信，接收器可能仍然随机放置在给定的位置或遵循随机航路点模型移动。在两种考虑的情况下，信道增益遵循随机分布，使问题在数学上具有挑战性。为随机放置和移动性效应的信道增益统计导出了新的数学表达式。然后，假设在接收器进行间接调制/直接检测，提取信噪比统计数据。因此，中断概率和平均误码率开关键控很容易计算。最后，一些相关的数值结果在一系列图中进行了描述，以突出整体性能。