From U-Tile to Indoor-Tracer: An Indoor Location Sensing Platform Based on Passive RFID

Lei, Jing; Cheng, Zixue; Zhou, Yinghui; Wang, Junbo

doi:10.1109/ithings/cpscom.2011.123

Cited by 6 publications

(3 citation statements)

References 8 publications

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“…The delay, D , is the average time for identifying a given number of tags. For a small number of tags, the relation between delay and number of tags is not linear because of collisions and bit errors . Using the dynamic Q‐algorithm, the tag identification speed of the EPC C1 G2 system approaches to a constant value for a large number of tags (larger than 100 tags) , and the relation between the delay and the number of tags approximates to be linear .…”

Section: Performance Analysismentioning

confidence: 99%

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Code division multiple access/pulse position modulation ultra‐wideband radio frequency identification for Internet of Things: concept and analysis

Zhi

Chen

et al. 2012

Int J Communication

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SUMMARY Radio frequency identification (RFID) is a compelling technology for Internet of Things (IoT). Ultra‐wideband (UWB) technology is one promising wireless technique for future RFID, especially for high‐throughput sensing applications. On‐off keying UWB RFID system provides high pulse rate but suffers severe collisions that limit the system throughput. This paper proposes to utilize low pulse rate code division multiple access/pulse position modulation UWB in the tag‐to‐reader link to provide multiple tag access capability and build a high‐throughput RFID system for IoT. We analyze asynchronous matched filter receiver and decorrelating receiver for multi‐tag detection and design an effective medium access control scheme to optimize the network throughput. We propose an effective dynamic frame size adjustment algorithm on the basis of theoretical analysis and determine the preferable length of Gold codes. With a similar data rate, the throughput of the proposed system using the decorrelating receiver is 8.6 times higher than that of the electronic product code class 1 generation 2 system. Only using 1/10 pulse rate and 1/15 data rate, the proposed system outperforms the on‐off keying UWB RFID system 1.4 times in terms of throughput. Copyright © 2012 John Wiley & Sons, Ltd.

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Section: Performance Analysismentioning

confidence: 99%

Section: Ber Analysismentioning

confidence: 99%

Code division multiple access/pulse position modulation ultra‐wideband radio frequency identification for Internet of Things: concept and analysis

Zhi

Chen

et al. 2012

Int J Communication

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“…While a simple RFID system can help identify an item, only a coarse-grained awareness of its location can be achieved, i.e., the tag is located somewhere in the interrogation zone of the reader. For some applications, for example, the Internet of Things (IoT), more accurate localization is needed [2].…”

Section: Introductionmentioning

confidence: 99%

Intercepting UHF RFID signals through synchronous detection

Borisenko

Bolić

Rostamian

2013

J Wireless Com Network

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Recently, augmented ultrahigh frequency radio-frequency identification (UHF RFID) systems have been developed, and they contain additional components that can detect a tag's backscattered response and use this information for the localization of the tag and other applications. The methods currently employed either have poor performance because the detection of the tag's response is based on envelope detection or are costly because they are based on software-defined radio. The solution proposed in the paper is to use a method called synchronous detection to intercept tag signals. Using synchronous detection, we were able to use a conventional UHF RFID reader integrated circuit for the method, leading to a cost-effective, high-performance solution. We performed an analysis of its read rate and read range performance. The analysis showed that our receiver is capable of receiving tag signals with a read rate of 50% for passive and 66% for semi-passive tags at a 1-m distance between the tag and the receiver and is capable of receiving tag signals at a maximum distance between the tag and the receiver of 3.25 m for passive and 5.5 m for semi-passive tags, with the reader being within 8 m of the receiver. This augmented RFID system has a potential to facilitate localization and prevent the cross-read problem in RFID-based portals. In addition, it can be used as a protocol analyzer as well as a component of future Internet of Things.

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A Feature-Scaling-Based <inline-formula> <tex-math notation="LaTeX">$k$</tex-math> </inline-formula>-Nearest Neighbor Algorithm for Indoor Positioning Systems

Liu

Zhang

2016

IEEE Internet Things J.

124

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From U-Tile to Indoor-Tracer: An Indoor Location Sensing Platform Based on Passive RFID

Cited by 6 publications

References 8 publications

Code division multiple access/pulse position modulation ultra‐wideband radio frequency identification for Internet of Things: concept and analysis

Code division multiple access/pulse position modulation ultra‐wideband radio frequency identification for Internet of Things: concept and analysis

Intercepting UHF RFID signals through synchronous detection

A Feature-Scaling-Based <inline-formula> <tex-math notation="LaTeX">$k$</tex-math> </inline-formula>-Nearest Neighbor Algorithm for Indoor Positioning Systems

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