Spectrum Situational Awareness Model Based on Wave Propagation Loss Characteristics and Distributed Electromagnetic Spectrum Detection Method

Electromagnetic spectrum situational awareness is the use of modern electronic technology and information processing technology to comprehensively, continuously and real-time monitoring, identification, positioning and tracking of the electromagnetic spectrum to obtain the dynamic situation of the electromagnetic environment, and to analyze and evaluate, so as to realize the perception and cognition of electromagnetic activities. In this paper, an electromagnetic spectrum situation prediction model is proposed. According to the historical data of electromagnetic information collected by several monitoring nodes in the target area, the historical distribution of electromagnetic environment is estimated, so as to estimate the spatial position change of the target signal source and predict the future electromagnetic spectrum situation. By using the characteristics of signal propagation loss in free space and the preprocessing of heterogeneous data in distributed monitoring system, the energy characteristics and timing characteristics of the signal are extracted and analyzed, so as to predict the electromagnetic spectrum situation of the target region.