Robust Differential Received Signal Strength Based Localization With Model Parameter Errors

Robust Differential Received Signal Strength Based Localization With Model Parameter Errors
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具有模型参数误差的基于鲁棒差分接收信号强度的定位

DOI:
10.1109/lsp.2018.2872901
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发表时间:
2018-10
影响因子:
3.9
通讯作者:
Hongyang Chen
Hongyang Chen
中科院分区:
工程技术2区
文献类型:
--
作者:
Shuli Yang;Gang Wang;Yongchang Hu;Hongyang Chen

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在这封信中,我们解决了基于模型参数误差的差分接收信号强度问题。为了处理模型参数误差,我们采用了鲁棒加权最小二乘准则,导致了一个极大极小优化问题。通过假设模型参数误差在一个球上,利用s引理将极大极小问题转化为一个可处理的重新表述。面对重新表述问题的非凸性,我们采用半定松弛法近似求解。所提出的方法只需要知道模型参数误差的上界,这实际上很容易获得。仿真结果表明,该方法对模型参数误差具有较强的鲁棒性,优于现有方法。
In this letter, we address the differential received signal strength based problem with model parameter errors. To deal with the model parameter errors, we adopt the robust weighted least squares criterion, leading to a minimax optimization problem. By assuming the model parameter errors lie in a ball, the minimax problem is transformed into a tractable reformulation via the S-Lemma. Confronted with the nonconvexity of the reformulated problem, we approximately solve it by applying the semidefinite relaxation. The proposed approach only requires the knowledge of the upper bounds of the model parameter errors, which are practically easy to acquire. Simulation results show that the proposed method is robust to the model parameter errors and outperforms the existing methods.
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