A GPS-less Navigation System

GPS receivers have a major drawback: they don't work properly under multi-storey concrete structures, for e.g. in underground car parks, University buildings, shopping malls, factory complexes etc. A navigation system for such huge enclosed spaces, which does not rely on a GPS is very desirable for visitors to such places who do not know the layout of the place. This paper presents the design and development of a low-cost GPS-less navigation system based on TI Stellaris-LM3S3748, which could help visitors find their way around such places.