High TX-to-RX Isolation in UHF RFID Using Narrowband Leaking Carrier Canceller

Xiong, Ting-wen; Tan, Xi; Xi, Jingtian; Min, Hao

doi:10.1109/lmwc.2009.2038620

Cited by 25 publications

(9 citation statements)

References 5 publications

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“…1, [6], [7], [8]. In the interference canceller system, the signal on the RX path is divided through two paths by a power divider (PD); although there might be convenience in an uneven power split in through this paper we consider a -3 dB splitting.…”

Section: A Interference Canceller Topologymentioning

confidence: 99%

“…Differently from solutions found in literature [8], [10], the reconfiguration of the proposed device can be autonomous, based on 5-steps algorithms, described in [9]. The key of the reconfiguration is the closed-form model expressed in (2), which permits the feedback on the controls on the base of the scalar measurement of the signal magnitude.…”

Section: Experimental Validationmentioning

confidence: 99%

See 1 more Smart Citation

Interference cancellation for the coexistence of 5.8 GHz DSRC and 5.9 GHz ETSI ITS

Maddio

Cidronali

Passafiume

et al. 2015

2015 IEEE MTT-S International Conference on Microwaves for Intelligent Mobility (ICMIM)

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Abstract-In this paper we analyze the cancellation of the interference caused by a Intelligent Transportation Systems (ITS) on devices operating in the Dedicated Short Range Communications (DSRC) framework. The cancellation is operated by an interference canceller based on the active feed-forward architecture. The canceller is designed to operate over the frequency band 5.2 GHz -6.4 GHz, hence it is suitable for the mitigation of mutual interference on signal pertinent to DSRC at 5.8 GHz due to ITS signals at 5.9 GHz. When applied to a Road Side Unit (RSU) for electronic toll collection (ETC) operating at 5.8 GHz, the proposed technique is capable to improve the performance of the front-end by cancelling the interfering signal in the 5.9 GHz bandwidth such as IEEE 802.11p signals involved in the ITS protocols; signal-to-interference improvement of 25 dB operating on 10 MHz bandwidth signal is herein reported. The paper introduces the architecture of the canceller as well as the experimental results which describe the capability of the technical approach.

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Section: A Interference Canceller Topologymentioning

confidence: 99%

Section: Experimental Validationmentioning

confidence: 99%

Interference cancellation for the coexistence of 5.8 GHz DSRC and 5.9 GHz ETSI ITS

Maddio

Cidronali

Passafiume

et al. 2015

2015 IEEE MTT-S International Conference on Microwaves for Intelligent Mobility (ICMIM)

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“…For the low CNR regime or when N is very large, noise limits the detection of the minimum power at the optimum LCC setting point when scanning the complete I/Q plane. Since this null is rather distinct [15,17], the noise influence is low.…”

Section: Noise Analysismentioning

confidence: 99%

“…This demands for receivers with very large dynamic ranges, which enhance costs, both on the analog front end as well as on the analog to digital converters. To reduce these demands, many authors [6,[8][9][10][11][12][13][14][15][16][17] as well as commercial monolithic RFID reader chip manufacturers [18,19] propose or use active leakage cancellation techniques. These techniques, which originate in radar [20,21], extract a part of the transmit signal, adjust it in amplitude and phase and inject it at the receiver.…”

Section: Introductionmentioning

confidence: 99%

Automatic leaking carrier canceller adjustment techniques

Lasser¹,

Langwieser

Mecklenbräuker

2013

J Embedded Systems

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In this contribution, four automatic adjustment algorithms for leakage carrier cancellation in radio frequency identification (RFID) readers are compared: full search, gradient search, fast and direct I/Q algorithms. Further, we propose two enhanced adjustment procedures. First, we analytically calculate the performance of the fast adjustment algorithm in the presence of noise and derive its theoretical bias. We compare the theoretical results with the numerical results from accompanying simulations. Further, we evaluate the performance of these algorithms based on real-world measurements acquired with our RFID testbed. Finally, we propose and discuss the merits of two enhanced adjustment procedures based on the fast adjustment algorithm. The fast adjustment procedure with bipolar probing signals achieves the isolation gain of the (much slower) gradient search algorithm at the expense of a mean penalty of 0.48 dB. We observe that the fast adjustment aided gradient algorithm requires 72% less steps than the gradient search algorithm in our measurements.

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“…A conventional circulator has 20 dB to 40 dB of isolation between the TX and the RX, and a directional coupler has about 30 dB of isolation [1]. Recently, there have been many attempts to minimize the TX leakage by applying a hybrid transformer, circulator, or directional coupler [1,2,3]. However, these off-chip components are not suitable for mobile devices that require a small form factor.…”

Section: Introductionmentioning

confidence: 99%

A CMOS wideband LNA with low-loss integrated TX leakage canceller

Kwon

Choi

2012

IEICE Electron. Express

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Abstract:A CMOS wideband LNA with tunable and low-loss integrated TX leakage canceller is presented. The low RX insertion loss of the TX leakage canceller is achieved by the autotransformer with loss compensating amplifier. The proposed TX leakage canceller is fabricated in 0.13 μm CMOS process. It provides over 55 dB rejection of the TX leakage at the RX port and the notch frequency can be controlled from 866 MHz to 961 MHz using a digitally controlled 4-bit switched capacitor array. The RX insertion loss of the wideband LNA with the TX leakage canceller decreased by 1 dB and the NF is decreased about 0.8 dB compared to that without the compensating amplifier.

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High TX-to-RX Isolation in UHF RFID Using Narrowband Leaking Carrier Canceller

Cited by 25 publications

References 5 publications

Interference cancellation for the coexistence of 5.8 GHz DSRC and 5.9 GHz ETSI ITS

Interference cancellation for the coexistence of 5.8 GHz DSRC and 5.9 GHz ETSI ITS

Automatic leaking carrier canceller adjustment techniques

A CMOS wideband LNA with low-loss integrated TX leakage canceller

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