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| 1 | 激光致声技术在跨冰层介质的空中-水下通信应用方法显示文摘无线电波、声波和光波通信技术可有效应用于复杂的海洋通信环境中,然而在极寒地区和极地区域海面冰层覆盖的情况下,其在远端发送信号将无法穿透冰层介质,而难以实现空中与水下的通信联络,故提出一种应用于跨冰层介质传输的激光致声通信体制,通过空中发射激光与海面固体冰层的互作用诱导声波信号,再利用海面上覆盖冰层的声源辐射,向下方水体传播来建立空中到水下光波与声波的通信链路,系统将光学与声学技术的有机融合,充分利用固体冰层对声波的快速传导作用,探讨光声转换机理、调制编码及激光声传输特点与性能分析,有效解决海洋通信中受冰层覆盖影响和单一种类信号传输受限问题,为海洋跨空通信提供一种新的技术途径。 | 何宁 廖欣 蒋红艳 | 2023 | 激光与红外2023，53，11： | 0 |
| 2 | Data Concurrent Transmission MAC Protocol for Application Oriented Underwater Acoustic Sensor Networks显示文摘With the increasing demand for marine exploration, underwater acoustic sensor networks (UASNs) are prone to have the characteristics of large-scale, long term monitoring, and high data traffic load. Underwater media access control (MAC) protocols, which allow multiple users to share the common medium fairly and efficiently, are essential for the performance of UASNs. However, the design of MAC protocols is confronted with the challenges of spatial unfairness, data eruption, and low energy efficiency. In this paper, we propose a novel data concurrent transmission (DCT) MAC protocol, which is able to exploit long propagation delay and conduct concurrent transmission. Specifically, we present the theoretical performance analysis of the proposed MAC protocol in detail and give an analytical solution of the success concurrent transmission probability between nodes. In addition, simulation results are provided to demonstrate that our proposed protocol is appropriate for UASNs and can significantly improve the performance in terms of network throughput and energy consumption. Finally, we give some typical future applications of UASNs and discuss the demands on MAC protocol design. | Xiaoxiao Zhuo Hong Yang Meiyan Liu Yan Wei Guanding Yu Fengzhong Qu | 2022 | China Communications2022，19，10： | 0 |
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