HF电波多跳传播分析

Analysis on HF Wave Multi-hop Propagation

针对HF通信的特点,通过射线追踪的原理,对电波传播过程进行机理分析,并借助MATLAB对HF传播过程中各阶段进行了动态仿真。对于电离层吸收损耗,利用数值分析的方法将电离层连续过程离散化,并进行迭代求解。将地球表面损耗分为固有反射损耗和附加反射损耗,同时针对大地表面、海洋表面两种不同情况进行分析。此外,结合自由空间传播损耗和额外系统损耗建立HF多跳传播模型,计算了反射损耗。最后,仿真得到了不同地型情况、电离层是否干扰下的电磁信号的多跳传输情况。

According to the characteristics of HF communication and based on the principle of ray tracing,the mechanism of radio wave propagation is analyzed.At the same time,dynamic simulation on each stage of HF propagation process is carried out by means of MATLAB.For the ionospheric absorption loss,the ionospheric continuous process is discretized via numerical analysis and iteratively solved.The surface loss of the earth is divided into intrinsic reflection loss and additional reflection loss,and the two different conditions of earth surface and ocean surface are also discussed.In addition,the HF multi-hop propagation model is established in combination with free space propagation loss and additional system loss,and the reflection loss calculated.Finally,simulation experiment indicates the multi-hop transmission of electromagnetic signals under different ground conditions and with or without ionospheric interference.