A Novel Method of Real Time Channel Evaluation on HF Communication

Traditional independent HF frequency sounding devices cost too much,while HF adaptive communication devices only have little detection function.In order to solve this problem,a novel HF channel evaluation system was designed,by emitting sounding signal from radio,the whole HF spectrum sounding could be executed at a relatively low investment.And sounding scheme optimization was focused on.The result of VOACAP was used to reduce sounding scale,and by analyzing the correlation of adjacent channel,the two level sounding scheme was proposed based on equal intervals sounding.The simulation results shown that this scheme balanced sounding speed and accuracy,and performed better than equal intervals sounding.