Distributed algorithm of subgradient optimization for localization based on received signal strength in wireless network

Pei Yun Tsai, Ching Hsien Wang

研究成果: 書貢獻/報告類型會議論文篇章同行評審

摘要

In this paper, we propose a subgradient optimization method for pedestrian localization based on received signal strength in wireless network. The objective function of weighted least-squares estimation is adopted, which shows good convexity and has immunity to shadowing effect. We also approximate the subgradient of the objective function by a recursive form so that it can be implemented in a decentralized manner within each sensing node. A variable step size is proposed to take into consideration both the subgradient and minimum adjustment to accelerate convergence. Furthermore, the convergence analysis is also given to show the feasibility of our design for the step size. From simulation results, we can see the proposed algorithm has better accuracy and convergence rate than the conventional decentralized algorithms to localize a stationary or moving target in wireless network.

原文???core.languages.en_GB???
主出版物標題2011 11th International Conference on ITS Telecommunications, ITST 2011
頁面668-672
頁數5
DOIs
出版狀態已出版 - 2011
事件2011 11th International Conference on ITS Telecommunications, ITST 2011 - St. Petersburg, Russian Federation
持續時間: 23 8月 201125 8月 2011

出版系列

名字2011 11th International Conference on ITS Telecommunications, ITST 2011

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???event.eventtypes.event.conference???2011 11th International Conference on ITS Telecommunications, ITST 2011
國家/地區Russian Federation
城市St. Petersburg
期間23/08/1125/08/11

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