Abstract
In this letter, we first show that the error in the received signal power estimation with an optimally interpolated radio environment map (REM) over a shadowing environment can be modeled using a correlation coefficient, similar to that of the imperfect channel state information over multipath fading channels. After the estimation error characteristic is applied for modeling the typical spatial spectrum sharing, we verify the validity of the model via numerical simulations of the REM-assisted spectrum sharing.
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