The advent of the global positioning system GPS has provided worldwide high-accuracy position measurements. However GPS may be rendered unavailable by jamming disruption of satellites or simply by signal shadowing in urban environments. Thus this thesis considers... Lees meer.

The global positioning system GPS provides high-accuracy position measurements anywhere in the world. However a limitation of this system is that a line of sight to multiple satellites is required therefore it is unsuitable to use indoors or in urban canyons. Also... Lees meer.