On geolocation accuracy with prior information in non-line-of-sight environment
On geolocation accuracy with prior information in non-line-of-sight environment
复制标题
非视距环境下先验信息的地理定位精度研究
DOI：
10.1109/vetecf.2002.1040350
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
Hisashi Kobayashi
中科院分区：
文献类型：
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作者：
Y. Qi;Hisashi Kobayashi
随着移动通信的快速发展，非视距（NLOS）地理定位成为一个重要问题。已经提出了几种方法来解决这个问题。然而，需要对这些方法可能达到的最佳地理定位精度进行全面研究。 Qi 和 Kobayashi（参见第 36 届信息科学与系统年会（CISS 2002）会议记录，普林斯顿大学，2002 年 3 月和 IASTED 国际无线和光通信会议（WOC 2002），加拿大班夫，2002 年 7 月）报告了适用于 NLOS 地理定位的 Cramer-Rao 下界（CRLB）和可实现界限的统一分析，假设没有关于移动台 (MS) 位置或 NLOS 引起的路径可用。然而，在实践中，我们通常会事先了解一些有关这些参数的信息。在本文中，我们在存在此类先验信息的情况下得出了地理定位精度的下限，并探讨了其物理解释。讨论了一些数值例子。
Non-line-of-sight (NLOS) geolocation becomes an important issue with the fast development of mobile communications. Several methods have been proposed to address this problem. However, a comprehensive study on the best geolocation accuracy that these methods may possibly achieve is called for. Qi and Kobayashi (see The Proceeding of the 36th Annual Conference on Information Sciences and Systems (CISS 2002), Princeton University, March 2002 and IASTED International Conference on Wireless and Optical Communications (WOC 2002), Banff, Canada, July 2002) reported a unified analysis of the Cramer-Rao lower bound (CRLB) and achievable bounds applicable to NLOS geolocation, assuming no prior information on the mobile station (MS) position or NLOS induced paths is available. In practice, however, we often have some information about these parameters beforehand. In this paper, we derive a lower bound for the geolocation accuracy in the presence of such prior information, and explore its physical interpretation. Some numerical examples are discussed.