RSS-Based Sensor Localization in the Presence of Unknown Channel Parameters
RSS-Based Sensor Localization in the Presence of Unknown Channel Parameters
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DOI：
10.1109/tsp.2013.2260330
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发表时间：
2013-08-01
影响因子：
5.4
通讯作者：
Strom, Erik G.
中科院分区：
文献类型：
--
作者：
Gholami, Mohammad Reza;Vaghefi, Reza Monir;Strom, Erik G.
该对应关系研究了当发射功率或路径损耗指数未知时基于接收信号强度的定位问题。相应的最大似然估计（MLE）提出了一个困难的非凸优化问题。为了避免求解极大似然估计的困难，我们使用适当的近似，并制定了一般的信赖域子问题的本地化问题，它可以在温和的条件下精确地解决。仿真结果表明，所提出的方法，这也有合理的复杂度相比，现有的方法有前途的性能。
This correspondence studies the received signal strength-based localization problem when the transmit power or path-loss exponent is unknown. The corresponding maximum-likelihood estimator (MLE) poses a difficult nonconvex optimization problem. To avoid the difficulty in solving the MLE, we use suitable approximations and formulate the localization problem as a general trust region subproblem, which can be solved exactly under mild conditions. Simulation results show a promising performance for the proposed methods, which also have reasonable complexities compared to existing approaches.