RFID Localization Estimation Techniques for Indoor Environment

Abstract

The purpose of wireless sensor network (WSN) has made real-time tracking of objects through the use of a radio frequency identification (RFID) system possible. Localization techniques in an RFID system affect on accurate estimation of the reading range between the sensor node and the tags. The tags consist of a chip and an antenna which receives from and transmits information to the sensor node. This paper aims to get the more accurate object location estimator within a complicated noisy propagation environment using RFID technology based on real-time locating system (RTLS). The location estimate is based on the reading range using a time difference of arrival (TDOA) approach. In order to obtain the location information, a multilateration technique is employed. The TDOA value is investigated in order to get the estimated tag position. Different numbers of readers are simulated to compare the mean error and the standard deviation in multilateration techniques. As the simulation results, we get the high performance when the number of readers in the network is increased