基于磁感应的跨介质通信技术研究

Research on Cross-medium Communication Technology Based on Magnetic Induction

摘要:

随着海洋军事与战略的发展，传统声学难以完成空水跨介质通信需求。磁感应通信技术由于在空水介质中磁导率一致，且具有信道稳定、速度快、体积灵活、成本低的优势，可以作为空水跨介质的技术补充。以磁偶极子为基础，对空水跨介质感应磁场传播模型进行了研究，证明磁场在空水界面的传播连续性， 之后基于 USRP 设计通信收发电路并实现一套磁感应通信系统。该系统在收发线圈半径 10 cm，发射功率 1 mW 情况下，实现空水(湖水)跨介质 20 m，通信速率 10 kbps 的无误码文本传输，证实了磁感应通信在空水跨介质场景下的可行性，对后续的相关研究具有一定的指导意义。

Abstract:

With the development of marine military and strategy，it is difficult for traditional acoustics to meet the requirements of air-water cross-medium communication. Magnetic induction communication technology can be used as a technical supplement for air-water cross-medium due to its consistent magnetic permeability in air-water medium and advantages of stable channel，fast speed，flexible volume and low cost. Based on magnetic dipole，this paper has studied the air-water cross-medium induced magnetic field propagation model to prove the propagation continuity of magnetic field at the air-water interface. Besides，a communication transceiver circuit has been designed based on USRP and a magnetic induction communication system has been realized. This system has achieved error-free text transmission with an air-water(lake)cross-medium of 20m and a communication rate of 10kbps under the condition where the radius of the transceiver coil is 10cm and the transmitting power is 1 mW， which has proved the feasibility of magnetic induction communication in air-water cross-medium scenario and provided guiding significance for the subsequent related research.