Robust Mobile Location Estimation Using Hybrid TOA/AOA Measurements in Cellular Systems |
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Authors: | Ann-Chen Chang Jhih-Chung Chang |
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Affiliation: | 1. Department of Information Technology, Ling Tung University, Taichung, 408, Taiwan, R.O.C.
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Abstract: | Estimating a location of mobile station is considerable interest in wireless cellular systems. This letter deals with a hybrid time-of-arrival (TOA)/angle-of-arrival (AOA) mobile location estimation under relatively low signal-to-noise ratio and moderately nonline-of-sight (NLOS) scenarios. To reduce location estimation errors, a robust estimator for hybrid TOA/AOA location systems is proposed by using the minimax mean-squared error (MSE) criterion. Simulation results demonstrate that the proposed estimator significantly outperforms the other least squares estimators. |
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