Timing error suppression scheme for CDMA network based positioning system

Abstract

This paper discusses an improved method for location in CDMA based cellular communication system. An effective technique is proposed for locating a mobile stationpsilas position based on Time Difference of Arrival (TDOA) technique. This technique is based on estimating the difference in the arrival time of the signal from the source at multiple receivers. The major error sources in the CDMA network location system are nonline-of-sight (NLOS) propagation error and hardware system such as repeater. Proposed algorithm based on probability of mobile station (MS) location in serving cell radius. We adopt an enhanced TDOA (E-TDOA) technique for suppress those timing errors. The performance of proposed algorithm is evaluated for CDMA based location system. Simulation also demonstrates in field environments.