Second-Order Cone Relaxation for TDOA-Based Localization Under Mixed LOS/NLOS Conditions
Second-Order Cone Relaxation for TDOA-Based Localization Under Mixed LOS/NLOS Conditions
复制标题
混合 LOS/NLOS 条件下基于 TDOA 的二阶锥弛豫
DOI：
10.1109/lsp.2016.2627603
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发表时间：
2016-12-01
影响因子：
3.9
通讯作者：
Li, Youming
中科院分区：
文献类型：
--
作者：
Wang, Wei;Wang, Gang;Li, Youming
在这封信中，解决了混合视距（LOS）/非视距（NLOS）条件下基于到达时间差的定位问题。在路径状态信息已知的假设下，我们制定了鲁棒加权最小二乘法来解决该问题。为了充分利用更准确的 LOS 测量，我们对 NLOS 测量项施加一个权重，并且导出并明确给出权重的选择。然后，我们采用二阶锥松弛技术将问题松弛为易于处理的二阶锥程序。仿真结果表明，先验路径状态信息显着提高了定位性能。
In this letter, the time-difference-of-arrival-based localization problem under mixed line-of-sight (LOS)/non-LOS (NLOS) conditions is addressed. Under the assumption that the path status information is known, we formulate a robust weighted-least-squares method to solve this problem. To fully utilize the more accurate LOS measurements, we impose a weight to the term with respect to the NLOS measurements, and the choice of the weight is derived and explicitly given. We then employ the second-order cone relaxation technique to relax the problem as a tractable second-order cone program. Simulation results show that the prior path status information significantly improves the localization performance.