Abstract
Radio frequency identification is widely used in many outdoor applications. In several outdoor application environments, a large number of antennas as well as tags are required. One of the most critical issues in these environments is the placement of antennas. Towards this end, this paper proposes an optimization model to find the optimal placement of the antennas. The cost function of the proposed model is to minimize the number of antennas needed and to minimize the collisions area for a specific area. To verify the feasibility of the proposed model, it is tested and solved using different configurations. (C) 2014 Elsevier B.V.