一种内插法与外推法混合的动态电磁环境地图构建方法

On the Construction of Dynamic Radio Environment Map by Combining Interpolation with Extrapolation

电磁环境地图(Radio Environment Map,REM)是一种认知电磁环境、掌控频谱使用的有效工具。REM的传统构建方法分为外推法和内插法两类。外推法主要采用各种电波传播损耗模型,内插法包括反距离加权法、Kriging法等。结合内插法和外推法各自的优势,提出一种内插法与外推法混合的动态REM构建方法,通过外推法计算出辐射源改变位置后每个测量点的频谱感知数据,再通过内插法生成REM,最后仿真验证了该方法的有效性。

Radio Environment Map(REM)is an effective tool used for understanding the electromagnetic environment and control the use of frequency spectrums.The traditional methods for constructing REM are divided into extrapolation and interpolation.When constructing REM through extrapolation,various types of electromagnetic propagation loss models are adopted.The interpolation methods include Inverse Distance Weighting(IDW),Kriging and so on.In order to integrate respective advantages of extrapolation and interpolation,a method for constructing dynamic REM by combining interpolation with extrapolation is proposed in this paper.With some moving radiation sources,the spectrum sensing data of measuring points can be obtained through extrapolation,and then the REM can be built through interpolation.Simulation results verify the effectiveness of the method.