论文标题
使用移动设备的水下消息传递
Underwater Messaging Using Mobile Devices
论文作者
论文摘要
自成立以来，水下数字声音通信需要定制硬件，即规模经济也不是无处不在的。我们介绍了第一个将水下消息传递功能带到智能手机和智能手表等现有移动设备的声学系统。我们的仅软件解决方案利用音频传感器（即麦克风和扬声器），在当今的设备中无处不在，可以在移动设备之间启用声学的水下通信。为了实现这一目标，我们设计了一个通信系统，该系统可以实时适应移动设备之间的频率响应的差异，在不同位置的多路径和噪声水平的变化以及由于移动性而引起的动态通道变化。我们在六个不同的实际水下环境中评估了我们的系统，在船，船只和钓鱼和皮划艇的存在下，深度为2-15 m。我们的结果表明，我们的系统可以实时调整其频带，并实现100 bps至1.8 kbps和30 m的比特速率。通过使用较低的比特速率10-20 bps，我们可以将范围进一步增加到100 m。随着智能手机和手表越来越多地用于水下场景，我们基于软件的方法有可能使水下消息传递功能可为拥有移动设备的任何人广泛使用。带有开源代码和数据的项目页面可以在此处找到：https：//underwatermessaging.cs.washington.edu/
Since its inception, underwater digital acoustic communication has required custom hardware that neither has the economies of scale nor is pervasive. We present the first acoustic system that brings underwater messaging capabilities to existing mobile devices like smartphones and smart watches. Our software-only solution leverages audio sensors, i.e., microphones and speakers, ubiquitous in today's devices to enable acoustic underwater communication between mobile devices. To achieve this, we design a communication system that in real-time adapts to differences in frequency responses across mobile devices, changes in multipath and noise levels at different locations and dynamic channel changes due to mobility. We evaluate our system in six different real-world underwater environments with depths of 2-15 m in the presence of boats, ships and people fishing and kayaking. Our results show that our system can in real-time adapt its frequency band and achieve bit rates of 100 bps to 1.8 kbps and a range of 30 m. By using a lower bit rate of 10-20 bps, we can further increase the range to 100 m. As smartphones and watches are increasingly being used in underwater scenarios, our software-based approach has the potential to make underwater messaging capabilities widely available to anyone with a mobile device. Project page with open-source code and data can be found here: https://underwatermessaging.cs.washington.edu/
