The present disclosure relates to a system and method for tracking an individual’s interaction with objects in a physical environment by pairing the movement of an RFID tagged object to a mobile device based on time and proximity. The method includes partially selecting partial paths from paths of a Viterbi trellis having a number corresponding to an order of a polynomial used in equalization, in an order where path metric values increase from a path having a minimum path metric value, deciding a best path having a minimum path metric value among the partial paths, and detecting data based on the best path. An opening formed in a lower portion of the door allows chilled air to enter the cabinet.