Ziv‐Zakai Bound for Direct Position Estimation

Ziv‐Zakai Bound for Direct Position Estimation
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ZivâZakai Bound 用于直接位置估计

DOI:
10.1002/navi.259
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发表时间:
2018
期刊:
NAVIGATION
影响因子:
--
通讯作者:
Vandendorpe, Luc
Vandendorpe, Luc
中科院分区:
--
文献类型:
--
作者:
Gusi‐Amigó, Adrià;Closas, Pau;Mallat, Achraf;Vandendorpe, Luc

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直接位置估计(DPE)已经作为传统的两步定位(2SP)方法的有吸引力的替代方案而出现。评估估计器性能的常用指标是Cramér-Rao界限(CRB)。然而,CRB仅在高信噪比(SNR)区域中准确。在低信噪比区域,估计误差较大,估计方差接近参数的先验值。在这种情况下,DPE方法有望克服2SP方法。为了阐明这方面的问题,本文给出了DPE方法的近似Ziv‐Zakai界(ZZB)的推导,以及基于ZZB的常规方法的均方误差(MSE)性能近似。推导出的界限进行比较,其相关的CRB,也与相应的最大似然估计(MLE)的性能。© 2018导航研究所。
Direct position estimation (DPE) has arisen as an appealing alternative to the conventional two‐step positioning (2SP) approach. The usual metric to assess the performance of estimators is the Cramér‐Rao Bound (CRB). However, the CRB is only accurate in the high signal‐to‐noise ratio (SNR) region. In the lower SNR regions, high estimation errors take place and the variance of the estimates approach thea prioridomain of the parameter. The DPE approach is expected to overcome the 2SP approach in such conditions. With the objective of throwing light on this aspect, this paper shows the derivation of an approximate Ziv‐Zakai Bound (ZZB) for the DPE approach and a mean square error (MSE) performance approximation based on the ZZB for the conventional approach. The derived bounds are compared with their associated CRBs and also with the performance of the corresponding maximum likelihood estimator (MLE). © 2018 Institute of Navigation.
DOI: 10.1109/icassp.1996.550148
发表时间: 1996-05
期刊: 1996 IEEE International Conference on Acoustics, Speech, and Signal Processing Conference Proceedings
影响因子: --
作者:
K. Bell;Y. Ephraim;H. V. Trees
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发表时间: 2014
影响因子: 5.4
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A. Mallat;S. Gezici;D. Dardari;C. Craeye;L. Vandendorpe
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IEEE 802.15.4a 通道中 IR-UWB 直接定位的评估
DOI: --
发表时间: 2013
期刊: International Conference on Ubiquitous Wireless Broadband
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作者:
M. Navarro;P. Closas;M. Nájar
通讯作者: M. Nájar