Interference Analysis of Uhf Rfid Systems

Kim, Doyun; Yoon, Ho‐Geun; Jang, Byung-Jun; Yook, Jong‐Gwan

doi:10.2528/pierb08010607

Cited by 47 publications

(27 citation statements)

References 7 publications

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“…However, this does not entirely eliminate reader-to-reader interference due to the incomplete spectral separation, which can still affect reader operation. Recent works have demonstrated the reduction in the interrogation range due to reader-to-reader interference [10].…”

Section: Introductionmentioning

confidence: 99%

Effects of Interferences in Uhf Rfid Systems

Lázaro¹,

Girbau²,

Villarino³

2009

PIER

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Abstract-The Radio Frequency Identification (RFID) applications are growing rapidly, especially in the UHF frequency band that is being used in inventory management. Passive UHF tags are preferred for these applications. In this paper, RFID reader-to-reader interference is analyzed. A model to estimate the minimum distance between readers to achieve a desired probability of detection in real multipath environments is derived and compared to the ideal case (AWGN channel). Diversity techniques to combat multipath and interference effects are proposed and studied.

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Section: Introductionmentioning

confidence: 99%

Effects of Interferences in Uhf Rfid Systems

Lázaro¹,

Girbau²,

Villarino³

2009

PIER

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“…However, unlike the traditional radio communication systems, in such systems, the RF signal does not provide reciprocity between forward and backward links because the reflected RF signal from a tag is inversely proportional to the fourth power of the distance between reader and tag [18]. For example, in the European Regulation [20], the reader output power of 2 Watt Effective Radiated Power (ERP) limits the reader-to-tags read range to a maximum distance of 10 meters while reader-to-reader interference range may reach 1000 meters [19].…”

Section: Introductionmentioning

confidence: 99%

How to Improve CSMA-Based MAC Protocol for Dense RFID Reader-to-Reader Networks?

Amadou

Mbacké

Mitton

2014

Ad-Hoc, Mobile, and Wireless Networks

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Abstract. Due to the dedicated short range communication feature of passive radio frequency identification (RFID) and the closest proximity operation of both tags and readers in a large-scale dynamic RFID system, when nearby readers simultaneously try to communicate with tags located within their interrogation range, serious interference problems may occur. Such interferences may cause signal collisions that lead to the reading throughput barrier and degrade the system performance. Although many efforts have been done to maximize the throughput by proposing protocols such as NFRA or more recently GDRA, which is compliant with the EPCglobal and ETSI EN 302 208 standards. However, the above protocols are based on unrealistic assumptions or require additional components with more control packet and perform worse in terms of collisions and latency, etc. In this paper, we explore the use of some well-known Carrier Sense Multiple Access (CSMA) backoff algorithms to improve the existing CSMA-based reader-to-reader anti-collision protocol in dense RFID networks. Moreover, the proposals are compliant with the existing standards. We conduct extensive simulations and compare their performance with the well-known state-of-the-art protocols to show their performance under various criteria. We find that the proposals improvement are highly suitable for maximizing the throughput, efficiency and for minimizing both the collisions and coverage latency in dense RFID Systems.

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“…The International standard, ISO 18000-6C defines the communication protocol and Ultra High Frequency (UHF) band between the reader and the passive tag [3,4]. Many researches related to the UHF RFID field have been conducted, as described in [5][6][7][8]. In case of the passive RFID technology, a reader must provide continuous radio power to a tag while the tag sends its information to the reader.…”

Section: Introductionmentioning

confidence: 99%

Study on the Demodulation Structure of Reader Receiver in a Passive Rfid Environment

Bae¹,

Choi²,

Kim³

et al. 2009

PIER

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Abstract-In this paper, we present a demodulation structure suitable for a reader receiver in a passive Radio Frequency IDentification (RFID) environment. In a passive RFID configuration, undesirable DC-offset phenomenon may appear in the baseband of the reader receiver. As a result, this DC-offset phenomenon can severely degrade the performance of the extraction of valid information from a received signal in the reader receiver. To mitigate the DC-offset phenomenon, we propose a demodulation structure to reconstruct a corrupted signal with the DC-offset phenomenon, by extracting useful transition information from the corrupted signal. It is shown that the proposed method can successfully detect valid data from a received signal, even when the received baseband signal is distorted with the DC-offset phenomenon.

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Interference Analysis of Uhf Rfid Systems

Cited by 47 publications

References 7 publications

Effects of Interferences in Uhf Rfid Systems

Effects of Interferences in Uhf Rfid Systems

How to Improve CSMA-Based MAC Protocol for Dense RFID Reader-to-Reader Networks?

Study on the Demodulation Structure of Reader Receiver in a Passive Rfid Environment

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