In this letter, we propose relay-based positioning in time division multiple access (TDMA) networks, called RPT. Although the concept of relay-based positioning is an improvement over the performance of relative navigation (RelNav), there are two problems to be solved when applying the relay concept to a TDMA network. First, measurement errors caused by mobility may degrade user accuracy because positioning references transmit navigation messages at their assigned times in TDMA, unlike conventional navigation systems, where all references continuously transmit. Second, a selection algorithm among airborne nodes is needed to relay messages to users. An RPT frame is designed to assign the slots for the broadcast and relay of navigation messages consecutively to minimize the effect of mobility. The selection algorithm determines the optimum set of airborne relays by selecting evenly distributed nodes depending on their distances to the master station. The simulation results indicate that RPT significantly improves user accuracy over RelNav.
[1]
Jaesung Lim,et al.
Airborne Relay-Based Regional Positioning System
,
2015,
Sensors.
[2]
Per K. Enge,et al.
Global positioning system: signals, measurements, and performance [Book Review]
,
2002,
IEEE Aerospace and Electronic Systems Magazine.
[3]
Now military leaders are looking for the technologies that can fill the gaps in PNT that occur in GPS signal – challenged conditions . changing the Game changer The Way Ahead for military PnT
,
2010
.
[4]
Chris Rizos,et al.
INVERTED PSEUDOLITE POSITIONING AND SOME APPLICATIONS
,
2002
.
[5]
J. F. O. Ranger.
Principles of JTIDS Relative Navigation
,
1996
.
[6]
W.R. Fried.
Principles and Simulation of JTIDS Relative Navigation
,
1978,
IEEE Transactions on Aerospace and Electronic Systems.
[7]
W. R. Fried,et al.
Avionics Navigation Systems
,
1969
.