33,439 research outputs found
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Receiver-Autonomous Spoofing Detection: Experimental Results of a Multi-antenna Receiver Defense Against a Portable Civil GPS Spoofer
In this work we demonstrate the use of a dual antenna
receiver that employs a receiver-autonomous angle-ofarrival
spoofing countermeasure. This defense is
conjectured to be effective against all but the most sophisticated spoofing attempts. The technique is based
on observation of L1 carrier differences between multiple
antennas referenced to a common oscillator.
We first employ a moderately sophisticated spoofer to
"fool" a single-antenna civil receiver. We then deploy the
same attack after augmenting the receiver with an
additional antenna and with receiver-autonomous spoofdetection
software. The work discusses the experimental
results together with various issues related to sensitivity,
probability of false alarm, impact of carrier multipath,
line-bias-calibration, and physical setup and security.
We suggest that this work is important to the community
as it provides experimental validation of a low-cost
technique for receiver-autonomous spoofing detection.
Furthermore, the technique, when combined with physical
security of the antenna installation, provides a strong
defense against even a sophisticated attack.
The receiver employed is an L1-only civil GPS receiver
with multiple antenna capability. The GPS chipset
employed is the venerable GP2015/GP2021 that has been
freely available for over a decade. As such, this receiver is
representative of many civil receivers in use today for a
variety of applications. Multiple antennas are enabled
either through multiple independent RF front ends and
correlators or via antenna multiplexing into a single RF
front end and correlator bank.Aerospace Engineering and Engineering Mechanic
Ultra wideband: applications, technology and future perspectives
Ultra Wide Band (UWB) wireless communications offers a radically different approach to wireless communication compared to conventional narrow band systems. Global interest in the technology is huge. This paper reports on the state of the art of UWB wireless technology and highlights key application areas, technological challenges, higher layer protocol issues, spectrum operating zones and future drivers. The majority of the discussion focuses on the state of the art of UWB technology as it is today and in the near future
Recommended from our members
Considerations for Future IGS Receivers
Future IGS receivers are considered against the backdrop of GNSS signal modernization
and the IGS’s goal of further improving the accuracy of its products. The purpose of this paper is to
provide IGS members with a guide to making decisions about GNSS receivers. Modernized GNSS signals
are analyzed with a view toward IGS applications. A schedule for minimum IGS receiver requirements
is proposed. Features of idealized conceptual receivers are discussed. The prospects for standard commercial
receivers and for software-defined GNSS receivers are examined. Recommendations are given
for how the IGS should proceed in order to maximally benefit from the transformation in GNSS that
will occur over the next decade.Aerospace Engineering and Engineering Mechanic
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