The invention discloses a reasoning method and
system for complementing the three-dimensional space position of an
electromagnetic radiation source based on spectrum situation data, and the method comprises the steps: obtaining the GIS data of a target region, constructing a geographic model of the target region, simulating the channel loss between a
radiation source and each receiving point in the geographic model through a dominant path propagation model, obtaining the intensity value of an original received
signal, and calculating the intensity value of the original received
signal. Forming
electromagnetic spectrum situation initial data; complementing a received
signal strength vacant area in the
electromagnetic spectrum situation initial data to form a three-dimensional
electromagnetic spectrum situation matrix, and storing the matrix locally according to a
radiation source position index; the three-dimensional electromagnetic spectrum situation matrix is input into a pre-trained neural network, a corresponding three-dimensional probability thermodynamic diagram is output, and the position coordinate with the maximum probability value in the thermodynamic diagram is the corresponding
radiation source position. The method has good expansibility, and can be widely applied to complex scenes depending on
spatial spectrum sensing, such as spectrum
resource planning, electromagnetic situation evaluation and network electric
countermeasure.