Hegarty Wins Best Paper Award for "Analytical Model for GNSS Receiver Implementation Losses"
Christopher J. Hegarty has won the 2011 Ronald Fante Best Paper Award for his paper "Analytical Model for GNSS Receiver Implementation Losses." The paper, which describes a model for predicting signal-to-noise ratio (SNR) losses in Global Navigation Satellite System (GNSS) receivers, appeared in the Spring 2011 issue of Navigation.
GNSS receivers, such as those used in the U.S. Global Positioning System (GPS) and the Russian GLONASS, derive their position by measuring the arrival time of signals emitted from four or more GNSS satellites. Modern GNSS receivers are digital. Design choices regarding sampling rate, quantization, and bandlimiting have significant ramifications for receiver performance, particularly when the receiver is operated in the presence of interference. Digitization is inherently a non-linear function, which makes analysis difficult, and earlier treatments resorted either to simplified models that are inaccurate or to simulation, which is time intensive.
Hegarty's winning paper describes an analytical model that can quickly and precisely predict losses caused by bandlimiting, sampling, and quantization, and can be adapted to multiple hardware configurations and scenarios. The model generates SNR loss values for GNSS signals in the presence of both additive white Gaussian noise and a broad class of interfering signals.
According to the statement from the Best Paper Awards Committee that accompanied the award, "The findings in this paper apply to all direct sequence spread-spectrum receivers—not only those for GNSS but also those for communications. The problem solved in this paper has remained unsolved for decades. Even worse, incorrect results have been widely published and used. Receiver designers themselves have lacked the basic knowledge and insights, producing inefficient designs as a result. Chris applied and extended decades-old theory, and had to perform challenging and intricate analysis to develop the results."
The 2012 competition also recognized 51 additional papers with an Incentive Award.
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Duquette, Christopher M. (G153), Steven B. Caudill, and Franklin G. Mixon, Jr., 2009, "The Impact of Campaign Spending on Winning Open-Seat Elections to the U.S. House of Representatives," Journal of Public Finance and Public Choice, 27(2–3), 171–182.
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Johnson, Neil F., Spencer Carran, Joel Botner, Kyle Fontaine, Nathan Laxague, Philip Nuetzel, Jessica Turnley, and Brian Tivnan (E526), July 1, 2011, "Pattern in Escalations in Insurgent and Terrorist Activity," Science, 33:81, 81–84 (plus supporting online material).
Kim, Seongwon, Wenling E. Chang (E52D), Rashmi Kumar, and Dmitri K. Klimov, April 2011, "Naproxen Interferes with the Assembly of Aß Oligomers Implicated in Alzheimer's Disease," Biophysical Journal, 100, 2024–2032.
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Nancy Letsinger, Nancy (K453), and Elaine Ward (K453), September 2011, "Spotlight Article: Perspectives on Enterprise Modeling," Journal of Enterprise Transformation, 1:3, 179–184.
Loehr, Daniel (E544), and Linda Van Guilder (former employee), December 2011, "Corpora, Databases, and Internet Resources," in Oxford Handbook of Laboratory Phonology, Abigail C. Cohn, Cécile Fougeron, and Marie K. Huffman, eds., Oxford: Oxford University Press.
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