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Xi\u2019an","award":["21JC030"],"award-info":[{"award-number":["21JC030"]}]},{"name":"Science and Technology Plan Project of Xi\u2019an","award":["22GXFW0124"],"award-info":[{"award-number":["22GXFW0124"]}]},{"name":"Science and Technology Plan Project of Xi\u2019an","award":["2019GXYD17.3"],"award-info":[{"award-number":["2019GXYD17.3"]}]}],"content-domain":{"domain":[],"crossmark-restriction":false},"short-container-title":["Sensors"],"abstract":"<jats:p>Attitude information is as important as position information in describing and localizing objects. Based on this, this paper proposes a method for object attitude sensing utilizing ultra-high frequency passive RFID technology. This method adopts a double tag array strategy, which effectively enhances the spatial freedom and eliminates phase ambiguity by leveraging the phase difference information between the two tags. Additionally, we delve into the issue of the phase shift caused by coupling interference between the two tags. To effectively compensate for this coupling effect, a series of experiments were conducted to thoroughly examine the specific impact of coupling effects between tags, and based on these findings, a coupling model between tags was established. This model was then integrated into the original phase model to correct for the effects of phase shift, significantly improving the sensing accuracy. Furthermore, we considered the influence of the object rotation angle on phase changes to construct an accurate object attitude recognition and tracking model. To reduce random errors during phase measurement, we employed a polynomial regression method to fit the measured tag phase information, further enhancing the precision of the sensing model. Compared to traditional positioning modes, the dual-tag array strategy essentially increases the number of virtual antennas available for positioning, providing the system with more refined directional discrimination capabilities. The experimental results demonstrated that incorporating the effects of inter-tag coupling interference and rotation angle into the phase model significantly improved the recognition accuracy for both object localization and attitude angle determination. Specifically, the average error of object positioning was reduced to 12.3 cm, while the average error of attitude angle recognition was reduced to 8.28\u00b0, making the method suitable for various practical application scenarios requiring attitude recognition.<\/jats:p>","DOI":"10.3390\/s24196305","type":"journal-article","created":{"date-parts":[[2024,9,30]],"date-time":"2024-09-30T07:19:37Z","timestamp":1727680777000},"page":"6305","update-policy":"https:\/\/doi.org\/10.3390\/mdpi_crossmark_policy","source":"Crossref","is-referenced-by-count":5,"title":["Tag-Array-Based UHF Passive RFID Tag Attitude Identification of Tracking Methods"],"prefix":"10.3390","volume":"24","author":[{"given":"Honggang","family":"Wang","sequence":"first","affiliation":[{"name":"College of Communication and Information Engineering, Xi\u2019an University of Posts and Telecommunications, Xi\u2019an 710121, China"}]},{"given":"Sicheng","family":"Li","sequence":"additional","affiliation":[{"name":"College of Communication and Information Engineering, Xi\u2019an University of Posts and Telecommunications, Xi\u2019an 710121, China"}]},{"given":"Yurun","family":"Zhou","sequence":"additional","affiliation":[{"name":"College of Communication and Information Engineering, Xi\u2019an University of Posts and Telecommunications, Xi\u2019an 710121, China"}]},{"given":"Yongli","family":"Wang","sequence":"additional","affiliation":[{"name":"College of Communication and Information Engineering, Xi\u2019an University of Posts and Telecommunications, Xi\u2019an 710121, China"}]},{"ORCID":"https:\/\/orcid.org\/0000-0002-1494-8922","authenticated-orcid":false,"given":"Ruoyu","family":"Pan","sequence":"additional","affiliation":[{"name":"College of Communication and Information Engineering, Xi\u2019an University of Posts and Telecommunications, Xi\u2019an 710121, China"}]},{"given":"Shengli","family":"Pang","sequence":"additional","affiliation":[{"name":"College of Communication and Information Engineering, Xi\u2019an University of Posts and Telecommunications, Xi\u2019an 710121, China"}]}],"member":"1968","published-online":{"date-parts":[[2024,9,29]]},"reference":[{"key":"ref_1","doi-asserted-by":"crossref","unstructured":"Montanaro, T., Sergi, I., Motroni, A., Buffi, A., Nepa, P., Pirozzi, M., Catarinucci, L., Colella, R., Chietera, F.P., and Patrono, L. (2022). An IoT-Aware Smart System Exploiting the Electromagnetic Behavior of UHF-RFID Tags to Improve Worker Safety in Outdoor Environments. Electronics, 11.","DOI":"10.3390\/electronics11050717"},{"key":"ref_2","doi-asserted-by":"crossref","unstructured":"Bendavid, Y., Rostampour, S., Berrabah, Y., Bagheri, N., and Safkhani, M. (2024). The Rise of Passive RFID RTLS Solutions in Industry 5.0. Sensors, 24.","DOI":"10.3390\/s24051711"},{"key":"ref_3","doi-asserted-by":"crossref","unstructured":"Bu, Y., Xie, L., Liu, J., He, B., Gong, Y., and Lu, S. (2017, January 12\u201314). 3-Dimensional Reconstruction on Tagged Packages via RFID Systems. Proceedings of the 14th Annual IEEE International Conference on Sensing, Communication, and Networking (SECON), San Diego, CA, USA.","DOI":"10.1109\/SAHCN.2017.7964911"},{"key":"ref_4","doi-asserted-by":"crossref","first-page":"1529","DOI":"10.1109\/TASE.2020.3008187","article-title":"A Standalone RFID-Based Mobile Robot Navigation Method Using Single Passive Tag","volume":"18","author":"Wu","year":"2021","journal-title":"IEEE Trans. Autom. Sci. Eng."},{"key":"ref_5","first-page":"6438057-1","article-title":"Application of Passive Wireless RFID Asset Management in Warehousing of Cross-Border E-Commerce Enterprises","volume":"11","author":"Hehua","year":"2021","journal-title":"J. Sens."},{"key":"ref_6","doi-asserted-by":"crossref","unstructured":"Yang, L., Lin, Q., Li, X., Liu, T., and Liu, Y. (2015, January 7). See Through Walls with COTS RFID System!. Proceedings of the 21st Annual International Conference on Mobile Computing and Networking (MobiCom \u201915), Paris, France.","DOI":"10.1145\/2789168.2790100"},{"key":"ref_7","doi-asserted-by":"crossref","unstructured":"Shangguan, L., Li, Z., Yang, Z., Li, M., and Liu, Y. (2013, January 14\u201319). OTrack: Order tracking for luggage in mobile RFID systems. Proceedings of the 2013 IEEE INFOCOM, Turin, Italy.","DOI":"10.1109\/INFCOM.2013.6567119"},{"key":"ref_8","doi-asserted-by":"crossref","unstructured":"Liu, J., Zhu, F., Wang, Y., Wang, X., Pan, Q., and Chen, L. (2017, January 1\u20134). RF-scanner: Shelf scanning with robot-assisted RFID systems. Proceedings of the IEEE INFOCOM 2017\u2014IEEE Conference on Computer Communications, Atlanta, GA, USA.","DOI":"10.1109\/INFOCOM.2017.8056985"},{"key":"ref_9","unstructured":"Hightower, J., Borriello, G., and Want, R. (2000). SpotON: An Indoor 3D Location Sensing Technology Based on RF Signal Strength, UW CSE."},{"key":"ref_10","unstructured":"Xiao, X., Jing, X., You, S., and Zeng, J. (2010, January 16\u201318). An environmental-adaptive RSSI based indoor positioning approach using RFID. Proceedings of the 2010 International Conference on Advanced Intelligence and Awareness Internet (AIAI 2010), Beijing, China."},{"key":"ref_11","doi-asserted-by":"crossref","unstructured":"Yang, L., Chen, Y., Li, X.-Y., Xiao, C., Li, M., and Liu, Y. (2014, January 7\u201311). Tagoram: Real-time tracking of mobile RFID tags to high precision using COTS devices. Proceedings of the 20th Annual International Conference on Mobile Computing and Networking (MobiCom\u201914), Maui, HI, USA.","DOI":"10.1145\/2639108.2639111"},{"key":"ref_12","doi-asserted-by":"crossref","first-page":"235","DOI":"10.1145\/2740070.2626330","article-title":"RF-IDraw: Virtual Touch Screen in the Air Using RF Signals","volume":"44","author":"Wang","year":"2014","journal-title":"ACM SIGCOMM Comput. Commun. Rev."},{"key":"ref_13","doi-asserted-by":"crossref","first-page":"35","DOI":"10.1145\/3103535.3103547","article-title":"Gyro in the Air: Tracking 3D Orientation of Batteryless Internet of Things","volume":"21","author":"Wei","year":"2017","journal-title":"GetMobile"},{"key":"ref_14","doi-asserted-by":"crossref","unstructured":"Jiang, C., He, Y., Yang, S., Guo, J., and Liu, Y. (2019, January 15\u201317). 3D-OmniTrack: 3D Tracking with COTS RFID Systems. Proceedings of the 2019 18th ACM\/IEEE International Conference on Information Processing in Sensor Networks (IPSN), Montreal, QC, Canada.","DOI":"10.1145\/3302506.3310386"},{"key":"ref_15","doi-asserted-by":"crossref","first-page":"6223","DOI":"10.1109\/TMC.2022.3181170","article-title":"Versatile RFID-Based Sensing: Model, Algorithm, and Applications","volume":"22","author":"Jin","year":"2023","journal-title":"IEEE Trans. Mob. Comput."},{"key":"ref_16","doi-asserted-by":"crossref","first-page":"634","DOI":"10.1109\/TMC.2019.2949412","article-title":"OmniTrack: Orientation-Aware RFID Tracking with Centimeter-Level Accuracy","volume":"20","author":"Jiang","year":"2021","journal-title":"IEEE Trans. Mob. Comput."},{"key":"ref_17","doi-asserted-by":"crossref","unstructured":"Lai, X., Cai, Z., Xie, Z., and Zhu, H. (2018). A Novel Displacement and Tilt Detection Method Using Passive UHF RFID Technology. Sensors, 18.","DOI":"10.3390\/s18051644"},{"key":"ref_18","doi-asserted-by":"crossref","unstructured":"Lin, Q., Yang, L., Sun, Y., Liu, T., Li, X.-Y., and Liu, Y. (2015, January 26\u201330). Beyond One-Dollar Mouse: A Battery-Free Device for 3D Human-Computer Interaction via RFID Tags. Proceedings of the 2015 IEEE Conference on Computer Communications (INFOCOM), Kowloon, Hong Kong, China.","DOI":"10.1109\/INFOCOM.2015.7218546"},{"key":"ref_19","doi-asserted-by":"crossref","first-page":"1590","DOI":"10.1109\/TASE.2017.2656947","article-title":"The Optimization for Hyperbolic Positioning of UHF Passive RFID Tags","volume":"14","author":"Ma","year":"2017","journal-title":"IEEE Trans. Autom. Sci. Eng."},{"key":"ref_20","doi-asserted-by":"crossref","first-page":"76768","DOI":"10.1109\/ACCESS.2019.2921560","article-title":"UHF RFID Indoor Positioning System With Phase Interference Model Based on Double Tag Array","volume":"7","author":"Zeng","year":"2019","journal-title":"IEEE Access"},{"key":"ref_21","doi-asserted-by":"crossref","first-page":"12954","DOI":"10.1109\/JIOT.2022.3169328","article-title":"Accurate AoA Estimation for RFID Tag Array With Mutual Coupling","volume":"9","author":"Wang","year":"2022","journal-title":"IEEE Internet Things J."},{"key":"ref_22","doi-asserted-by":"crossref","first-page":"586","DOI":"10.1109\/TMC.2015.2424437","article-title":"BackPos: High Accuracy Backscatter Positioning System","volume":"15","author":"Liu","year":"2016","journal-title":"IEEE Trans. Mob. Comput."},{"key":"ref_23","doi-asserted-by":"crossref","unstructured":"Liu, J., Chen, M., Chen, S., Pan, Q., and Chen, L. (2017, January 1\u20134). Tag-compass: Determining the spatial direction of an object with small dimensions. Proceedings of the IEEE INFOCOM\u20142017 Conference on Computer Communications, Atlanta, GA, USA.","DOI":"10.1109\/INFOCOM.2017.8057159"},{"key":"ref_24","doi-asserted-by":"crossref","unstructured":"Bu, Y., Xie, L., Gong, Y., Wang, C., Yang, L., Liu, J., and Lu, S. (2018, January 16\u201319). RF-Dial: An RFID-based 2D Human-Computer Interaction via Tag Array. Proceedings of IEEE INFOCOM 2018\u2014IEEE Conference on Computer Communications, Honolulu, HI, USA.","DOI":"10.1109\/INFOCOM.2018.8486309"},{"key":"ref_25","doi-asserted-by":"crossref","first-page":"4632","DOI":"10.1109\/JIOT.2018.2795893","article-title":"PSOTrack: A RFID-Based System for Random Moving Objects Tracking in Unconstrained Indoor Environment","volume":"5","author":"Li","year":"2018","journal-title":"IEEE Internet Things J."},{"key":"ref_26","doi-asserted-by":"crossref","unstructured":"Wang, C., Xie, L., Zhang, K., Wang, W., Bu, Y., and Lu, S. (May, January 29). Spin-Antenna: 3D Motion Tracking for Tag Array Labeled Objects via Spinning Antenna. Proceedings of the IEEE INFOCOM 2019\u2014IEEE Conference on Computer Communications, Paris, France.","DOI":"10.1109\/INFOCOM.2019.8737372"},{"key":"ref_27","doi-asserted-by":"crossref","first-page":"191","DOI":"10.1109\/JRFID.2021.3053101","article-title":"Trajectory-Tracking of UHF RFID Tags, Exploiting Phase Measurements Collected From Fixed Antennas","volume":"5","author":"Tzitzis","year":"2021","journal-title":"IEEE J. Radio Freq. Identif."},{"key":"ref_28","doi-asserted-by":"crossref","first-page":"2331","DOI":"10.1109\/TNET.2023.3348950","article-title":"GLAC: High-Precision Tracking of Mobile Objects With COTS RFID Systems","volume":"32","author":"Gong","year":"2024","journal-title":"IEEE ACM Trans. Netw."},{"key":"ref_29","doi-asserted-by":"crossref","first-page":"1698","DOI":"10.1109\/TASE.2019.2895104","article-title":"A Fast UHF RFID Localization Method Using Unwrapped Phase-Position Model","volume":"16","author":"Wu","year":"2019","journal-title":"IEEE Trans. Autom. Sci. Eng."},{"key":"ref_30","doi-asserted-by":"crossref","first-page":"1200","DOI":"10.1109\/TMC.2019.2907244","article-title":"Probing into the Physical Layer: Moving Tag Detection for Large-Scale RFID Systems","volume":"19","author":"Wang","year":"2020","journal-title":"IEEE Trans. Mob. Comput."},{"key":"ref_31","unstructured":"Wang, J.J., Hwang, J.G., and Park, J.G. (2024, June 07). A Novel Ranging Method Using Bimodal Gaussian Distributed RSSI Measurements. Available online: https:\/\/api.semanticscholar.org\/CorpusID:250083583."},{"key":"ref_32","doi-asserted-by":"crossref","first-page":"9286","DOI":"10.1109\/TITS.2021.3085824","article-title":"UHF-RFID-Based Real-Time Vehicle Localization in GPS-Less Environments","volume":"23","author":"Chen","year":"2021","journal-title":"IEEE Trans. Intell. Transp. Syst."},{"key":"ref_33","unstructured":"(2006). Information Technology\u2014Radio Frequency Identification for Item Management\u2014Part 6: Parameters for Air Interface Communications at 860 MHz to 960 MHz (Standard No. ISO\/IEC 18000-6)."}],"container-title":["Sensors"],"original-title":[],"language":"en","link":[{"URL":"https:\/\/www.mdpi.com\/1424-8220\/24\/19\/6305\/pdf","content-type":"unspecified","content-version":"vor","intended-application":"similarity-checking"}],"deposited":{"date-parts":[[2025,10,10]],"date-time":"2025-10-10T16:06:40Z","timestamp":1760112400000},"score":1,"resource":{"primary":{"URL":"https:\/\/www.mdpi.com\/1424-8220\/24\/19\/6305"}},"subtitle":[],"short-title":[],"issued":{"date-parts":[[2024,9,29]]},"references-count":33,"journal-issue":{"issue":"19","published-online":{"date-parts":[[2024,10]]}},"alternative-id":["s24196305"],"URL":"https:\/\/doi.org\/10.3390\/s24196305","relation":{},"ISSN":["1424-8220"],"issn-type":[{"value":"1424-8220","type":"electronic"}],"subject":[],"published":{"date-parts":[[2024,9,29]]}}}