Civil and Environmental Engineering
GPS has become ubiquitous in daily life, to an extent聽that the position, and often more importantly, the time聽delivered by GPS has become embedded in an increasing聽number of critical systems. However, given their low聽received power levels, GPS signals are very susceptible聽to Radio Frequency Interference (RFI) from either聽intentional or unintentional sources. In addition to RFI,聽Spoofing attacks, where fake GPS signals are broadcast聽to trick the operation of a GNSS receiver, present a聽serious threat to GNSS reliability and security. This聽vulnerability is aggravated as satellite navigation becomes聽more central to the operation of airports, ports railways,聽and communications systems.
During 2015 a research associate was identified and聽appointed to work on the follow on Australian Research聽Council (ARC) sponsored Linkage project partnering聽with ACSER, the University of Adelaide and GPSat
Systems. This project aims to further extend the capability聽of GEMS, which was developed as part of the earlier聽ARC Linkage project with the same partners, to pinpoint聽attempts to jam or fake GPS signals (spoofers), before聽either has serious consequences.
Research work to date concentrated on formulating聽the 3D Angle of Arrival (AOA) based geo-localization of聽interference sources, and deriving the dilution of precision聽and Cramer Rao Lower Bound (CRLB) expressions聽which characterises the accuracy of the proposed聽approach. Furthermore, an estimator whose performance聽approaches the CRLB is also developed. Another strand聽of work is concentrating on the joint AOA and Time聽Difference of Arrival (TDOA) based geo-localisation.聽
2015 also saw the Capability and Technology聽Demonstrator (CTD) project successfully completing the聽design review process and manufacture of the multichannel聽processing platform with extensive tests planned
for 2016.
糖心logo, University of Adelaide, GPSAT Systems, Australian Government - Australian Research Council
School