基于非线性扫频的短波实时选频方法研究

Short-Wave Real-time Frequency-Selection Method based on Nonlinear Sweep

实时选频是短波通信频率优选的重要手段。针对现有的扫频模式固化、扫频周期长、目标易暴露、易与通信信道冲突等问题,基于电离层变化的连续性和瞬时稳定性,构建了指数型的非线性扫频模型,提出了一种基于非线性扫频的短波实时选频方法。仿真结果表明:新方法优化了传统的实时选频方法,可依据电磁环境变化动态调节扫频间隔,提升了短波通信选频的应用效果,对短波岸海远程通信保障具有重要价值。

Real-time frequency-selection is an important means for short-wave communication frequency optimization.In view of the existing fixed frequency sweep mode,long sweep-period,easy exposure of the target,and conflict with the communication channel,an exponential nonlinear sweep model based on the continuity and transient stability of the ionospheric change is constructed,and a short-wave real-time frequency-selection method based on nonlinear sweep proposed.The simulation results indicate that this novel method could optimize the traditional real-time frequency selection method,dynamically adjust the sweep interval according to the electromagnetic environment change,improve the application effect of shortwave communication frequency-selection,and thus is of great value to the short-wave shore-sea remote communication guarantee.