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The Radio Environment Map (REM) stores radio environmental information that can be used to enhance cognitive radio resource management in wireless networks. In this paper, the authors propose an iterative REM building process based on Kriging interpolation technique that builds the REM using geo-located measurements performed by mobile terminals. As terminal measurements are costly in terms of signalling and battery consumption, they propose an algorithm that chooses the most appropriate measurements to be requested to the mobiles. They compare the performance of this algorithm with a random choice of measurements and show that their algorithm reduces the squared error of the power map by 16%.
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