短波地空信道组排序优化研究

Research on Frequency Group Order Optimizing Strategy for HF Air-Ground Communication

针对短波地空通信,基于ITS区域信噪比数据,采用插值算法确立了各信道航线信噪比随时间的分布曲线。依据信噪比的分布,得出了一种依据信噪比排序的自动链路建立(ALE)频率组排序更新策略,同时给出了性能评估标准,构造了建链成功率和平均建链时间的理论模型。经仿真验证,该策略下的ALE一次建链成功率有了较大提高,平均建链时间大幅减小,大大提高了通信质量。

According to the present High Frequency(HF) air-ground communications,interpolation algorithm is used to ascertain the distribution of every channel′s SNR along time on the route.A new Auto Link Establishment(ALE) scan list updating strategy that is based upon the order of SNR is achieved according to the distribution of SNR.Meanwhile,the evaluation standards of capability are given.This paper also constructs the theoretical mode of link establishment successful rate and average link establishment time.According to the validation of simulations,the link establishment successful rate is greatly improved,and the average link establishment time is shortened,accordingly the quality of communication is enhanced.