Location tracking in GPS using Kalman Filter through SMS

摘要

We present a novel technique to send GPS coordinates to other mobiles through short message service (SMS) based on Global Positioning System (GPS) technology. Two algorithms, Kalman filter and velocity renovation, which can be used in conjunction with GPS are used as a basis for location tracking. This technique can be used to help people, using their mobile with or without GPS, to find the location of a friend using Google maps. The first coordinates are generated from a GPS assisted mobile on Google map, this location is then sent through SMS to another person. The latter can then see the exact location of the sender on his map with an accuracy of 0.57 m (Table 1). The advantages of this technology is by using existing equipments and free services like Google maps and GPS, we can construct a very reliable location tracking system. The basis of this program is GPS. GPS is a satellite-based navigation system made up of a network of 24 satellites placed into orbit by the United States (US) Department of Defense (DoD). GPS was originally intended for military applications, but in the 1980s, the government made the system available for civilian use. GPS can show you your exact position on the Earth in any weather conditions, anywhere in the world, 24 hours a day. There are no subscription fees or setup charges to use GPS. The improved location tracking algorithm which uses the Kalman filter with the velocity renovation process is implemented. The velocity renovation process consists of a velocity estimator and direction finder. By this process, the proposed algorithm can use accurately estimated velocity in the location estimation.