Positioning System Using Digital Television Terrestrial Multimedia Broadcasting Signals and GPS Signals

In this paper a positioning system using digital television terrestrial multimedia broadcasting signals was introduced to solve the problem that observed GPS satellites are not enough between tall buildings.Also when the number of GPS satellites is more than four,digital television terrestrial multimedia broadcasting signals can be used to improve the GDOP provided by the GPS satellite constellation.Principal of the system was introduced and computer simulations were done to simulate the digital television terrestrial broadcasting signals and single point and processes of successively points positioning.Simulation results show the system can get higher accuracy positioning results and successfully position under limited GPS signals observability conditions.