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Robust location algorithm for NLOS environments** This project was supported by the National Natural Science Foundation of China (60372022) and Program for New Century Excellent Talent Support Plan of China (NCET 05-0806).

Authors
Journal
Journal of Systems Engineering and Electronics
1004-4132
Publisher
Institute of Electrical and Electronics Engineers
Publication Date
Volume
19
Issue
4
Identifiers
DOI: 10.1016/s1004-4132(08)60158-9
Keywords
  • Software Algorithm And Simulation
Disciplines
  • Communication
  • Computer Science

Abstract

Abstract One of the main problems facing accurate location in wireless communication systems is non-line-of-sight (NLOS) propagation. Traditional location algorithms are based on classical techniques under minimizing a least-squares objective function and it loses optimality when the NLOS error distribution deviates from Gaussian distribution. An effective location algorithm based on a robust objective function is proposed to mitigate NLOS errors. The proposed method does not require the prior knowledge of the NLOS error distribution and can give a closed-form solution. A comparison is performed in different NLOS environments between the proposed algorithm and two additional ones (LS method and Chan's method with an NLOS correction). The proposed algorithm clearly outperforms the other two.

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