A UHF frontend for MIMO applications in RFID

Langwieser, Robert; Angerer, Christoph; Scholtz, Arpad L.

doi:10.1109/rws.2010.5434118

Cited by 35 publications

(19 citation statements)

References 6 publications

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“…In [9], a prototype for the RFID-MIMO in the UHF-band was reported. In [10], both MIMO-based zero-forcing and minimummean-square-error receivers were used to deal with the multiple-tag identification problem, where the channel of the whole chain was estimated, similar to the approach in [8].…”

Section: Introductionmentioning

confidence: 99%

A space-time coding approach for RFID MIMO systems

Zheng

Kaiser

2012

J Embedded Systems

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This paper discusses the space-time coding (STC) problem for RFID MIMO systems. First, a mathematical model for this kind of system is developed from the viewpoint of signal processing, which makes it easy to design the STC schemes. Then two STC schemes, namely Scheme I and Scheme II, are proposed. Simulation results illustrate that the proposed approaches can greatly improve the symbol-error rate (SER) or bit-error rate (BER) performance of RFID systems, compared to the non space-time encoded RFID system. The SER/BER performance for Scheme I and Scheme II is thoroughly compared. It is found that Scheme II with the innate real-symbol constellation yields better SER/BER performance than Scheme I. Some design guidelines for RFID-MIMO systems are pointed out.

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Section: Introductionmentioning

confidence: 99%

A space-time coding approach for RFID MIMO systems

Zheng

Kaiser

2012

J Embedded Systems

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“…[12], which have evolved at an exceptional rate during the past decade and reached a state of maturity in theory after their breakthrough discovery so that they quickly found their way into the practical applications and standards for enabling outstanding reliable communications; such as, e.g. GSM/UMTS/LTE wireless LANs (WLANs) [39], Wireless Mesh Networks (WMNs) [40], mobile WiMAX 802.16 [41], and RFID systems [42]. As far as the M = 16-QAM modulation scheme provides a good trade-off in terms of the power and bandwidth efficiencies and therefore widely adopted in standardized wireless systems (e.g., DVB, HSDPA protocol, and IEEE 80211a PHY layer for modulating OFDM subcarriers), the introduced integrated OSTBC-SCQICs results in the significant coding gains while also improving spectral efficiencies.…”

Section: Numerical Results and Discussionmentioning

confidence: 99%

Serial concatenation of quadratic interleaved codes in different wireless doppler environments

Rahimian

Mehran

Maunder

2013

2013 IEEE 4th International Conference on Electronics Information and Emergency Communication

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Abstract-The remarkable development of mobile networks has enabled ubiquitous communications that has transformed the way people connect with each other. Meanwhile, the growing adoption of smartphones, tablets, and increasingly bandwidthintensive applications and services is driving unprecedented mobile broadband traffic growth; therefore, finding state-of-theart strategies for improving the wireless transmission reliability has emerged significantly. In particular, to enable significant mitigation of the detrimental effects of multipath fading, highperformance forward error correction (FEC) techniques have now recognized to become a vital part of modern digital wireless systems. This work is dedicated to address a class of highperformance iteratively decoded FECs referred to as serial concatenation of quadratic interleaved codes (SCQICs) wherein the reordering arrays for permutor and unscramble in the FEC encoding/decoding entities enjoy the remarkable algorithm proposed by Takeshita et al. seminal contribution which: (1) yields provisioning coding gain in both waterfall and error-floor regions of the bit error rate (BER) performance curve (2) enables possibility of analysis and compact representation, (3) requires straightforward implementation. We have observed that their utilization for the modern wireless communications applications remained scarce due to the lack of strong and comprehensive performance predictions over the different statistical wireless channel models. Hence, in this paper, we endeavor to analyze and examine the error-correction capability of SCQICs vastly from the various aspects, and investigate their resultant coding gains in different wireless Doppler environments.

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“…However, only one antenna was dedicated for either transmission or reception. MIMO techniques [6] have been successfully applied to RFID systems to utilize MIMO's advantages, such as spatial multiplexing and high diversity gains [5,7,8]. Initial research was carried out, deploying more than one receiving antenna at the reader, anticipating taking the advantage of receiver diversity.…”

Section: Introductionmentioning

confidence: 99%

A maximum likelihood based tag detection technique for MIMO chipless RFID systems

Divarathne

Karmakar

2014

2014 IEEE International Microwave and RF Conference (IMaRC)

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Chipless RFID systems are perhaps the most eligible candidate for catering to the demand of low-cost multiple item tagging in the future. However, one of the main challenges in chipless RFID systems, is its lower data capacity. Earlier we proposed a MIMO based chipless RFID system which has a higher data capacity using a threshold based detection technique. Maximum likelihood (ML) detection techniques have shown that the reading reliability can be significantly improved on a SISO chipless RFID system. In this paper, we present a detection technique that can be used to detect tag data bits in a MIMO based chipless RFID system. Preliminary results show the validity of the proposed detection method in terms of detection error rate under different noise conditions.

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A UHF frontend for MIMO applications in RFID

Cited by 35 publications

References 6 publications

A space-time coding approach for RFID MIMO systems

A space-time coding approach for RFID MIMO systems

Serial concatenation of quadratic interleaved codes in different wireless doppler environments

A maximum likelihood based tag detection technique for MIMO chipless RFID systems

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