Tham khảo tài liệu 'advanced radio frequency identification design and applications part 11', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | 10 Improving Position Estimation of the RFID Tag Floor Localization with Multiple Recognition Ranges Youngsu Park Je Won Lee Daehyun Kim Sang-woo Kim Electronic and Electric Engineering department POSTECH Korea South 1. Introduction This chapter introduces the RFID tag floor localization method with multiple recognition ranges and its mathematical formulation to improve position estimation accuracy. Using the multiple recognition ranges of RFID reader the reader can obtain more information about the distances to the tags on the tag floor. The information is used to improve the position estimation performance. At first this chapter reviews the RFID tag floor localization method with single recognition range for mobile robots Park et al. 2010 and The performance measure based on the position estimation error variance for the localization method. For the second this paper extends the mathematical formulation of the localization method and the performance measure for the case of multiple recognition ranges. This work is related to the previous work Park et al. 2009 that used multiple powers to improve position estimation performance. However previous work lacks analysis and mathematical formulation of general RFID tag recognition models. We extend the mathematical formulation and the analysis of the single recognition range RFID tag floor localization method Park et al. 2010 to the multiple recognition range case. Then the minimum error variance of multiple recognition range is introduced as a lower bound of position estimation error variance. Finally it presents performance improvement of proposed localization method via the Monte-Carlo simulation and simple experiments. The analysis for the simulation and experimental results and the consideration for real application will be given. This chapter is organized as follows This section discusses sensor systems used in the mobile robot localization. Then the advantages of the RFID systems as sensor systems for .
