This thesis presents a study of an aerial relay between ground mobile nodes. Two different strategies of building this aerial relay are studied. For both strategies, the airborne relay is considered as a signal repeater between the two ground mobile vehicles. Non-line-of-sight (NLOS) conditions are considered between the aerial relay and each mobile node. The first strategy (aerial bridge) implies that an unmanned aerial vehicle (UAV) is trying to keep an optimal position between the two ground nodes while in the aerial mast strategy; the UAV is always placed directly above one of the ground vehicles. This latter strategy is proposed in order to reduce the dynamics of the optimal position of the relay in particular caused by the directivity of mobile ground antennas.
Winner II propagation models are used in order to simulate these airborne relays and compare the performance achieved within each relay strategy. In particular, an urban environment propagation scenario is adopted.
Simulation results demonstrate in each case the variation of transmitted signal strength due to ground vehicles and UAV movement. Trajectories are generated randomly for both ground nodes on a street map of an urban area in order to achieve a statistical analysis of both strategies and discuss their advantages in terms of signal transmission and UAV navigation control.
| Date | 27 May 2014 |
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| Original language | French |
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| Awarding Institution | - École de technologie supérieure
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| Supervisor | François Gagnon (Supervisor) |
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Ben Moussa, C. (Author),
Gagnon (Supervisor),
27 May 2014Student thesis: Master's thesis › Master in Engineering: Electrical Engineering