基于磁感应技术的WUSN信道路径损耗分析

Analysis of Channel Path Loss in Wireless Underground Sensor Networks Based on Magnetic Induction Technology

针对磁感应线圈(Magnetic Induction,MI)在无线地下传感器网络(Wireless Underground Sensor Network,WUSN)传输过程中对信道路径损耗的影响,分析了不同影响因素下的路径损耗变化,研究并确定了磁感应线圈在土壤中传输的等效电路。在此基础上建立并仿真频率、磁导率、距离因素下的路径损耗变化模型,确定了基于各影响因子的路径损耗变化情况,同时初步设计收发电路,确定了磁感应技术在土壤传输过程中所考虑的影响因素要少于电磁波技术所考虑的影响因素,同时表明了磁感应技术在土壤传输中可以克服电磁波技术所产生的信号干扰因素多、衰减大等问题,从而有效解决了信道条件动态变化以及天线尺寸大的问题,为更进一步的深入研究奠定了基础。

For effects,conducted by magnetic induction coil magnetic induction （MI） in the wireless underground sensor networks （WUSN） transmission for channel path loss , the path loss variation under different influencing factors is analyzed, and the equivalent circuit of transmission of magnetic induction coil in the soil is studied and determined. Accordingly, the frequency, permeability, distance factor variations in path loss model are established and simulated, and identified based on variations in path loss of each influencing factor. Meanwhile, the preliminary design transceiver circuit conducts a foundation for the further in - depth study.