(15)
Pseudolite is a word-blend of "pseudo" and "satellite."
Pseudolites include satellite-like transmitters that function similarly to GPS, but signals are transmitted closer to the Earth instead of coming from space, and the transmitters reside in terrestrial rather than on-orbit platforms such as a tent, vehicle, or low-flying aircraft.
What's more, given that satellite data may sometimes be hard to retrieve--in urban canyons, for example--Coggins needs to integrate satellite data with signals from new systems, such as nearby "
pseudolite" ground stations that provide a higher-power alternative to the weak GPS signals.
WiFi-based indoor positioning [6] have been more widely used in buildings than other local methods like RFID [7], Ultra Wideband (UWB) [8], Zigbee [9], Bluetooth [10] and
Pseudolite [11].
The alternative in those places can be for example inertial measurement systems INS or
pseudolite positioning systems.
Chang, "Performance analysis of GPS
pseudolite interference mitigation using adaptive spatial beamforming," in Proceedings of the 61st Annual Meeting of The Institute of Navigation, pp.
Thornburg, "Characterization and performance of a prototype wideband airport
pseudolite multipath limiting antenna for the local area augmentation system," in Proceedings of the 2003 National Technical Meeting of The Institute of Navigation, pp.
Raquet, "Accurate positioning using a planar
pseudolite array," in Proceedings of the IEEE/ION Position, Location and Navigation Symposium, pp.433-440, May 2008.
The Locata technology consists of a network of terrestrially-based and time-synchronised
pseudolite transceivers, as shown in Fig.
In parallel with such efforts, Darpa (Defense Advanced Research Projects Agency) has been working under the GPX
Pseudolite programme on the use of UAV-borne or ground-based transmitters that would create a high-powered artificial GPS environment over the battle area.
Imagine what a sophisticated middle income country could do with a few thousand French and/or Russian precision guided munitions (PGMs); a few hundred unmanned aerial vehicles (UAVs) (from any of 30 countries); digital videocameras; personal computers; cellular switches phones and pagers; GPS and
pseudolite receivers; pocket radars; and night vision goggles; plus archived Powerscene maps combining purchased space imagery and topography, all integrated by a few hundred U.S.