Research Of Indoor Wireness Location Algorithm Based On RFID Technology

With non-contact, non-line advantage, quick identification, RFID technology has been named the preferred technology of indoor positioning applications,and has great market potential and value. And LANDMARC system based on RFID technology is a classical indoor positioning system, has been quoted by many domestic and foreign researchers in related fields and reference.Firstly, analysised a various of factors that influence the positioning accuracy of LANDMARC system from every point through modeling and simulation, also obtained its best value.And compared the positioning performance of the LANDMARC algorithm and the maximum likelihood estimation method and the objective function method based on path loss model through simulation, and obtained LANDMARC algorithm is the preferred indoor positioning algorithm indeed. And taking into deployed ART of LANDMARC system with uniform network architecture under the complex indoor environment is undesirable, so this paper proposes a ART optimization deployed strategy based on improved particle swarm algorithm and have validated the optimization capability and convergence rate of the algorithm through modeling and simulation. Finally,because LANDMARC algorithm is limited to two-dimensional space positioning system so far,and the study of three-dimensional space is close to empty, proposes a kind of improved LANDMARC algorithm based on space-based segmentation to achieve a three-dimensional positioning system functions.