2009 IEEE International Conference on RFID最新文献_第5页

A UHF RFID channel emulator hardware for playback of measured link-scenarios UHF RFID信道模拟器硬件，用于回放测量的链路场景

2009 IEEE International Conference on RFID Pub Date : 2009-04-27 DOI: 10.1109/RFID.2009.4911206

H. Arthaber, C. Schuberth

引用次数: 5

Read range measurements of UHF RFID transponders in mobile anechoic chamber 移动消声室中超高频射频识别应答器的读取距离测量

2009 IEEE International Conference on RFID Pub Date : 2009-04-27 DOI: 10.1109/RFID.2009.4911193

W. Strauss, Sebastian Kraus, M. Hartmann, C. Grabowski, J. Bernhard

引用次数: 7

UHF RFID transponders antenna design for metal and wood surfaces 用于金属和木材表面的超高频RFID应答器天线设计

2009 IEEE International Conference on RFID Pub Date : 2009-04-27 DOI: 10.1109/RFID.2009.4911174

R. Kanan, Ataollah Azizi

引用次数: 16

Power-optimized waveforms for improving the range and reliability of RFID systems 用于提高RFID系统的范围和可靠性的功率优化波形

2009 IEEE International Conference on RFID Pub Date : 2009-04-27 DOI: 10.1109/RFID.2009.4911196

M. Trotter, J. Griffin, G. Durgin

引用次数: 163

ALOHA algorithm considering the slot duration difference in RFID system RFID系统中考虑插槽持续时间差异的ALOHA算法

2009 IEEE International Conference on RFID Pub Date : 2009-04-27 DOI: 10.1109/RFID.2009.4911180

Dan Liu, Zhongxiang Wang, Jie Tan, Hao Min, Junyu Wang

{"title":"ALOHA algorithm considering the slot duration difference in RFID system","authors":"Dan Liu, Zhongxiang Wang, Jie Tan, Hao Min, Junyu Wang","doi":"10.1109/RFID.2009.4911180","DOIUrl":"https://doi.org/10.1109/RFID.2009.4911180","url":null,"abstract":"when multiple RFID tag identification is becoming a commonplace, the anti-collision technology for multiple RFID tag environment has drawn mounting research interest in the RFID domain. Many published Aloha-based algorithms, assuming that all the slots have the same duration, tend to increase the number of successful slots by tag estimation and dynamic frame scheduling, and thus improve the system efficiency (the ratio of successful slots to all slots in each frame), which is limited by 1/e according to the theory of Probability. Whereas, in this paper, the effect of the empty slots and collided slots is analyzed and two novel methods based on the parameters of EPC Gen2 protocol, BIS and Collision Detection, are proposed, to improve the RFID system efficiency by reducing the cost of the none successful slots other than the successful slots. Moreover, a new approach to evaluate the system efficiency for multiple tag identification, taking consideration of the duration difference of the slots, is presented. According to the simulation and test results, the proposed methods, BIS and Collision Detection, can improve the system throughput by 120% and 30∼40% respectively.","PeriodicalId":417077,"journal":{"name":"2009 IEEE International Conference on RFID","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127539295","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 34

Broadband suppression properties of active leaking carrier cancellers 有源泄漏载波消除器的宽带抑制性能

2009 IEEE International Conference on RFID Pub Date : 2009-04-27 DOI: 10.1109/RFID.2009.4911192

G. Lasser, R. Langwieser, A. Scholtz

{"title":"Broadband suppression properties of active leaking carrier cancellers","authors":"G. Lasser, R. Langwieser, A. Scholtz","doi":"10.1109/RFID.2009.4911192","DOIUrl":"https://doi.org/10.1109/RFID.2009.4911192","url":null,"abstract":"In passive UHF RFID systems backscattering is used for tag to reader communication. This technique relies on a continuous wave signal being transmitted by the reader during the tag's data transfer. In order to separate transmission and reception paths circulators, directional couplers or disjoint transmit and receive antennas can be used. Perfect isolation is not achievable with any of those approaches. So a leaking carrier is present at the receiver in any case. It is possible to reduce the interference from this signal by some kind of leaking carrier cancellation. Such a cancellation prevents receiver blocking and reduces the baseband hardware's requirements, depending on the receiver concept. Usually, the narrowband properties of carrier cancellers are studied. This is only sufficient for conventional RFID systems, if the transmitter noise can be neglected. Broadband RFID systems, as recently discussed in literature, also require broadband leaking carrier cancellers. In this paper the broadband suppression properties of carrier cancellers are first investigated theoretically. Further a hardware implementation is presented and characterized. Finally, measurement results are compared to the theoretical findings.","PeriodicalId":417077,"journal":{"name":"2009 IEEE International Conference on RFID","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121520059","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 32

Reliable identification of RFID tags using multiple independent reader sessions 使用多个独立的阅读器会话可靠地识别RFID标签

2009 IEEE International Conference on RFID Pub Date : 2009-04-16 DOI: 10.1109/RFID.2009.4911187

R. M. Jacobsen, K. F. Nielsen, P. Popovski, T. Larsen

{"title":"Reliable identification of RFID tags using multiple independent reader sessions","authors":"R. M. Jacobsen, K. F. Nielsen, P. Popovski, T. Larsen","doi":"10.1109/RFID.2009.4911187","DOIUrl":"https://doi.org/10.1109/RFID.2009.4911187","url":null,"abstract":"Radio Frequency Identification (RFID) systems are gaining momentum in various applications of logistics, inventory, etc. A generic problem in such systems is to ensure that the RFID readers can reliably read a set of RFID tags, such that the probability of missing tags stays below an acceptable value. A tag may be missing (left unread) due to errors in the communication link towards the reader e.g. due to obstacles in the radio path. The present paper proposes techniques that use multiple reader sessions, during which the system of readers obtains a running estimate of the probability to have at least one tag missing. Based on such an estimate, it is decided whether an additional reader session is required. Two methods are proposed, they rely on the statistical independence of the tag reading errors across different reader sessions, which is a plausible assumption when e.g. each reader session is executed on different readers. The first method uses statistical relationships that are valid when the reader sessions are independent. The second method is obtained by modifying an existing capture-recapture estimator. The results show that, when the reader sessions are independent, the proposed mechanisms provide a good approximation to the probability of missing tags, such that the number of reader sessions made, meets the target specification. If the assumption of independence is violated, the estimators are still useful, but they should be corrected by a margin of additional reader sessions to ensure that the target probability of missing tags is met.","PeriodicalId":417077,"journal":{"name":"2009 IEEE International Conference on RFID","volume":"33 3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-04-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116745348","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 22