The iterative completion method of the spectrum map based on the difference of measurement values

Spectrum maps represent the spatial distribution of signal strength in a particular area and are necessary in spectrum management applications such as frequency reuse and prediction of coverage. This paper studies the problem of spectrum map complementation under the condition of limited observations. First, the relationship among the number of radiation sources, the rank of the spectrum map, and the complement performance is discussed. Then, for the problem of complementation performance of spectrum map being not ideal when there are too many radiation sources, an iterative completion method of spectrum map based on difference of observation values is proposed. This method is used to reconstruct the variation of the frequency spectrum map at the adjacent time. Simulation results show that the proposed method is superior to the direct complement method in accuracy and complement performance.