带内全双工水声通信技术研究现状与展望

Research Status and Prospect of In-band Full-duplex Underwater Acoustic Communication Technology

摘要:

近年来，水声通信技术已经被广泛应用于海洋环境观测等方面，但可预见的，在未来发展趋势下，以半双工体制为主的水声通信网络，将会无法满足日益增长的水下信息交互需求。带内全双工水声通信技术可以在相同的通频带内，同时发射和接收通信信号，理论上可将现有的频谱效率提高 1 倍，在水声信道可用频谱资源严重受限、水下信息交互需求激增的背景下具有极高的研究意义与应用价值。因此，带内全双工水声通信技术已逐渐成为了目前水声通信领域的研究热点之一。简要介绍了目前无线电及水声通信背景下的带内全双工技术研究现状，对带内全双工水声通信面临的主要挑战进行了论述，并结合目前现有研究成果与实际工程应用中的难点问题，提出了几种可行的研究方向。

关键词:带内全双工;水声通信;自干扰抵消;水声通信机

Abstract:

In recent years，underwater acoustic(UWA)communication technology has been widely used in military marine environment observation. However，it is foreseeable that in the future，the UWA communication network based on half-duplex(HD)system can not meet the growing demand of underwater information interaction. In-band full-duplex(IBFD)UWA communication technology can transmit and receive communication signals in the same passband at the same time，which can double the efficiency theoretically. It has great research significance and application value under the background of severely limited spectrum resources of available UWA channel and rapidly increasing demand for underwater information interaction. Therefore，IBFD-UWA communication technology has gradually become a research hotspot in the field of UWA communication. This paper briefly introduces the current research status of IBFD technology under the background of radio and UWA communication，and discusses the main challenges faced by IBFD-UWA communication. Combined with existing research results and difficult problems in practical engineering application，several feasible research directions are proposed.

Key words:in-band full-duplex;underwater acoustic communication;self-interference cancellation; underwater acoustic communication set