Reference modulation for calibrated measurements of tag backscatter

Kuester, Daniel G.; Novotný, David; Guerrieri, Jeffrey R.; Direen, Randal H.; Popović, Zoya

doi:10.1109/rfid.2011.5764616

Cited by 5 publications

(6 citation statements)

References 16 publications

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“…This is the convention in electromagnetic compatibility (EMC) [27,28][29, p. 467] and historical work in communications [30][31][32][33][34]. It has also applied in previous publications by some authors of this work [35][36][37]. Fields are the basic quantity in Maxwell's equations, the basis of the classical electromagnetism underpinning antenna and propagation theory, RF and microwave circuits, and commercial electromagnetic simulation tools.…”

Section: A1 Definition Of Power Incident Upon Dutsmentioning

confidence: 99%

LTE impacts on GPS: final test report

Young¹,

Feldman²,

Genco³

et al. 2017

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The mission of the National Advanced Spectrum and Communications Test Network (NASCTN) is to provide, through its members, robust test processes and validated measurement data necessary to develop, evaluate and deploy spectrum sharing technologies that can increase access to the spectrum by both federal agencies and non-federal spectrum users.The U.S. Department of Commerce's National Institute of Standards and Technology (NIST) and National Telecommunications and Information Administration (NTIA) established the Center for Advanced Communications (CAC) in Boulder, Colorado, to address, among other challenges, the increasing need for spectrum sharing testing and evaluation capabilities to meet national needs. As part of CAC's mission to provide a single focal point for engaging both industry and other government agencies on advanced communication technologies, including testing, validation, and conformity assessment, NASCTN was formed under the umbrella of the CAC. NIST hosts the NASCTN capability at the Department of Commerce Boulder Laboratories in Boulder, Colorado. NASCTN is a membership organization under a charter agreement. Members• Make available, in accordance with their organization's rules policies and regulations, engineering capabilities and test facilities, with typical consideration for cost.• Coordinate their efforts to identify, develop and test spectrum sharing ideas, concepts and technology to support the goal of advancing more efficient and effective spectrum sharing.• Make available information related to spectrum sharing, considering requirements for the protection of intellectual property, national security, and other organizational controls, and, to the maximum extent possible, allow the publication of NASCTN test results.• Ensure all spectrum sharing efforts are identified to other interested members.Current charter members are:• National Telecommunications and Information Administration (NTIA)• National Institute of Standards and Technology (NIST) AcknowledgmentsThe development and execution of this test methodology and data parsing and analysis required input from multiple types of expertise. Integrating and leveraging a wide range of technical skills was critical to the overall success of the project. Team members, while responsible for specific areas in their domain of expertise, were called upon to contribute to other technical and programmatic areas as needed to ensure the overall project success.Within the technical team, Dr. Daniel G. Kuester led the RF testbed design, including the automation and calibration processes; Dr. Adam Wunderlich headed up the data analysis, investigation into measurand behaviors, and presentation of collected data; Dr. Duncan A. McGillivray led the integration of devices under test (DUTs), optimization of the test operations for efficiency, and establishment of the GPS test conditions with Carlos Ruiz of the Electronic Proving Grounds at Fort Huachuca1; John Ladbury led the RF uncertainty analysis and supported calibration of the RF signaling chain; a...

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Section: A1 Definition Of Power Incident Upon Dutsmentioning

confidence: 99%

LTE impacts on GPS: final test report

Young¹,

Feldman²,

Genco³

et al. 2017

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show abstract

“…To avoid this problem, at the sacrifice of the generality offered by a "black box" tag characterization, results in this paper are from measurements of available power transmitted into and received from the test antennas. Transmitted power is measured with a directional coupler and power sensor, and backscattered power is measured with the calibration introduced in [5].…”

Section: A Existing Test Standardsmentioning

confidence: 99%

“…In this approach, reference modulation, which is backscattered from the antenna shown on the right, is used to calibrate backscatter measurements from each sample. The details of the method can be found in [5].…”

Section: B General Testbed Configurationmentioning

confidence: 99%

“…Ptx corresponds to transmit power available to the input of S, and P bs is the backscattered power out of the non-transmit port of S that is available to the receiver. Reference backscatter, generated on the right, is used to calibrate measurements of tag backscatter as in [5]. The antenna used to generate reference modulation is a pyramidal horn with 6 dBi nominal gain, oriented toward the testbed antennas to maximize the strength of the reference signal.…”

Section: B General Testbed Configurationmentioning

confidence: 99%

“…The more accurate calibrated power P bs is then computed as the final result, with the method described in [5].…”

Section: Backscattered Power Measurementsmentioning

confidence: 99%

See 2 more Smart Citations

Testing passive UHF tag performance evolution

Kuester

Novotný

Guerrieri

et al. 2011

2011 IEEE International Conference on RFID-Technologies and Applications

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Abstract-Trends in tag development since the introduction of the ISO 18000-6C and EPC Global standards are investigated empirically with measurements of power harvesting and backscattering performance from 20 samples of passive tags across 860-960 MHz. The population spans ages of 0 to 6 years, 9 tag manufacturers, and 3 chip manufacturers. All tags were still in working condition, except two 5-year-old tags that no longer responded to interrogations and a 3-year-old tag with a degraded chip-to-antenna bond. Despite steadily improving chips, some older tags show performance comparable to new tags.

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