短波天波通信频率预测模型建立与仿真

摘要

Compared with microwave communication,satellite communication and ultrashort wave communication,shortwave communication although relatively limited communication rate,but with prominent characteristics of long distance communication,simple equipment and strong survivability,is still an important means of military communication at sea. Short wave communication is constrained by the number of channels, ionospheric variations and the influence of electromagnetic interference,communication environment is deteriorating. In order to ensure the reliability of HF military communication,the mathematical model to predict the frequency should be established. The existing shortwave communication frequency prediction models need manual search chart,and unsuited to computer. Based on the existing short wave propagation prediction model,using the International Geomagnetic Reference Field Model( IGRF ),the simple HF transmission loss calculation model is established. This model has been used in the simulation system,and has good effect,and it has good engineering application value.%与微波通信、卫星通信和超短波通信等方式对比，短波通信虽然通信速率相对有限，但具有通信距离远、设备简单、抗毁性强的突出特点，仍然是海上军事通信的重要手段。但短波通信受到信道数量、电离层变化、电磁干扰的影响，通信环境不断恶化，为了保证短波军事通信的可靠性，需要通过建立相应的数学模型对频率预测进行预测，以保证短波通信网络的正常运转。针对现有短波通信频率预测模型计算繁琐、需要手工查找图表、不利于计算机实现等缺点，本文在现有短波传播预测模型的基础上，引入国际参考地磁场模型，设计完成了简洁完整的传输损耗计算模型，同时也减少了误差，能够方便地用于计算机仿真实现。此模型已在具体仿真系统中运用，使用效果良好，具有较好的工程运用价值。