| 无线传感器网络TDOA测距误差分析与校正 |
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| 引用本文： | 黄晓利,王福豹,段渭军,杨跃.无线传感器网络TDOA测距误差分析与校正[J].计算机测量与控制,2008,16(7):1053-1056. |
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| 作者姓名： | 黄晓利 王福豹 段渭军 杨跃 |
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| 作者单位： | 西北工业大学,宽带网络技术研究所,陕西,西安,710072 |
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| 基金项目： | 国家自然科学基金资助项目 |
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| 摘 要： | 测距是无线传感器网络定位的基础,基于TDOA的测距有较高的精度;分析现有的基于TDOA的无线传感器网络定位系统与算法,使用基于超声波传感器和无线射频模块的TDOA测距技术,并针对测距过程中存在的误差,提出一种新的误差补偿和校正方法;该方法在对TDOA误差源及其影响行为进行详细分析的基础上,建立了测距误差模型;对影响较大的误差因子给予单独校正,并结合相关数学原理,引入了最小二乘回归,建立了误差校正的方案;实验结果表明,该方法有效地减小了测距误差的影响,从而提高了系统定位精度。
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| 关 键 词： | 节点定位 无线传感器网络 TDOA测距 最小二乘回归 误差校正 |
Error Analysis and Calibration of TDOA Ranging for Wireless Sensor Networks |
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| Huang Xiaoli,Wang Fubao,Duan Weijun,Yang Yue.Error Analysis and Calibration of TDOA Ranging for Wireless Sensor Networks[J].Computer Measurement & Control,2008,16(7):1053-1056. |
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| Authors: | Huang Xiaoli Wang Fubao Duan Weijun Yang Yue |
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| Affiliation: | (Institute of Broadband Network,Northwest Polytechnical University,Xi’an 710072,China) |
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| Abstract: | A novel approach is presented for time difference of arrival(TDOA) ranging to calibrate and compensate ranging error of sensors.In this paper,based on the analysis of ranging error behaviors,the proposed algorithm makes a model of the distribution of the ranging error which tries to improve the system localization precision as a whole.Combining with correlative mathematics principle,Least Square Regression(LSR) is imported to set up error calibration scheme.Test shows that by applying the proposed algorithm,the affection of ranging error is reduced efficiently,and localization precision is increased. |
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| Keywords: | node localization wireless sensor networks(WSN) TDOA least square regression(LSR) error calibration |
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