A Survey on TOA Based Wireless Localization and NLOS Mitigation Techniques
A Survey on TOA Based Wireless Localization and NLOS Mitigation Techniques
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DOI：
10.1109/surv.2009.090308
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发表时间：
2009-01-01
影响因子：
35.6
通讯作者：
Chong, Chia-Chin
中科院分区：
文献类型：
--
作者：
Guvenc, Ismail;Chong, Chia-Chin
文献中已经广泛研究了使用来自不同基站的到达时间（TOA）的无线设备的定位。还报道了许多具有不同精度、计算复杂性、先验知识要求以及针对非视距（NLOS）偏差效应的不同鲁棒性水平的定位算法。然而，据我们所知，文献中没有对不同定位和 NLOS 缓解算法进行详细的统一调查。本文旨在全面回顾这些不同的基于 TOA 的定位算法及其技术挑战，并指出未来可能的研究方向。首先，总结了视距 (LOS) 场景的基本下限和一些接近这些下限的实用估计量。然后，在给出非视距系统的基本下界后，对不同的非视距缓解技术进行了分类和总结。还提供了模拟结果，以便比较各种技术的性能。最后，提供了一个总结所研究技术的关键特征的表格来总结本文。
ocalization of a wireless device using the time-of-arrivals (TOAs) from different base stations has been studied extensively in the literature. Numerous localization algorithms with different accuracies, computational complexities, a-priori knowledge requirements, and different levels of robustness against non-line-of-sight (NLOS) bias effects also have been reported. However, to our best knowledge, a detailed unified survey of different localization and NLOS mitigation algorithms is not available in the literature. This paper aims to give a comprehensive review of these different TOA-based localization algorithms and their technical challenges, and to point out possible future research directions. Firstly, fundamental lower bounds and some practical estimators that achieve close to these bounds are summarized for line-of-sight (LOS) scenarios. Then, after giving the fundamental lower bounds for NLOS systems, different NLOS mitigation techniques are classified and summarized. Simulation results are also provided in order to compare the performance of various techniques. Finally, a table that summarizes the key characteristics of the investigated techniques is provided to conclude the paper.