Abstract
The precise position of the mobile station is critical for the ever increasing number of applications based on location . In this paper a new approach for mobile positioning in WCDMA (Wideband Code Division Multiple Access ) cellular network is proposed . Radio Received Signal Strength Indication (RSSI) can be measured from a number of nearby base stations . Three proposed approaches (3-BS's , 5-BS's and 7-BS's) are simulated using three propagation models and the rmserror is calculated for each model. As a simulation study case, the University of Mosul area is choosed to find the position of a mobile user in the university campus .
Highlights
Mobile positioning in cellular mobile networks provide several services such as locating stolen / lost mobile, emergency calls network,self optimizations different billing tariffs depending on where the call is originated and other applications
Three propagation models are used in simulation to find d based on Received Signal Strength Indication (RSSI) using MATLAB software 7.4 version
The real points locations are shown in table (2): These locations are located on the map and the simulation is run for each location to find the location using one of the three propagation models mentioned before
Summary
Mobile positioning in cellular mobile networks provide several services such as locating stolen / lost mobile, emergency calls network ,self optimizations different billing tariffs depending on where the call is originated and other applications. The main disadvantage of GPS/AGPS( Assisted GPS) and (TOA) systems is that they assume Line-of-Sight (LOS) propagation between the transmitter and the receiver. In general this assumption is not valid in city centers where LOS is often blocked by buildings and other obstacles. The accuracy of these systems is significantly degraded by the multi-path propagation caused by signals bouncing off buildings or other elevated topological features. In this paper the Received Signal Strength Indication (RSSI) is used to find distance between base station and mobile using outdoor propagation models , where there is no need for TOA (a synchronized system).
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