Enhanced Signal-Strength-difference Position Method based on an Inversion Propagation Model in Cellular Network

摘要

This paper develops a simple and efficient position method based on relative signal-strength prediction, which can be got from an inversion propagation model in cellular networks. The inversion propagation model can predict the propagation loss between any two points along the virtual propagation path from the base-station to mobile-station, which precision has been presented in [1]. So the user's location can be predicted by matching the average signal-strength-difference of the neighboring list in the mobile phone to the coverage prediction differences from multiple base-stations in the appointed area. The effectiveness of the proposed method has been demonstrated by using experiments under various radio environments in Guang Dong, China. It was shown that the enhanced signal-strength-difference position method can locate the user with about the accuracy of 150 m in 67 percentage and 300m in 92 percentage respectively. Despite the result not meeting Federal Communications Commission (FCC) requirements, this method proved to be sufficiently simple and efficient in terms of the computation at burden and network signaling load.