Abstract
This paper presents the concept of the Radio Environment Map (REM) to support Cognitive Networks and improve the efficiency of spectrum usage. The architecture of REM and its relation to other military systems are presented. The map construction techniques based on spatial statistics and transmitter location determination are discussed. The problem of REM quality and relevant metrics is analyzed. The results of field tests taken for UHF range with sensor network are discussed and exemplary maps with different interpolation algorithms are presented.
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