3、-.冥',一/矣打.v:.梦.V诗^’^折’‘>;费。.'V:.義cI為;細讀./療-'.‘.,、;:;麥泣苗""寮填LocalizationforWirelessSensorNetworksviaMatrixCompletionThesisSubmitted toNanjing University of Posts and Telecommunications for the Degree of Master of EngineeringByC
4、haoheng ShaSupervisor: Prof. Fu XiaoMarch2016摘要近年来,无线传感器网络获得了快速的发展,并以其低成本、大规模和自组织的特点带来了信息感知的一场变革。在无线传感器网络中,传感器节点自身位置信息的获取对各种应用而言至关重要。因此,如何实现节点的精确定位是无线传感器网络的关键技术之一。现有无线传感器网络节点定位算法在定位精度、抗噪性能、定位代价方面仍存在不足,本文基于压缩感知领域的矩阵补全理论,深入研究和探讨了无线传感器网络定位算法。论文首先改进了现有的矩阵补全模型,引入正则化
6、原始指纹库,从而减少离线阶段构造指纹数据库的工作开销;范数正则化补全算法能够有效平滑噪声信号,从而提升了定位算法的鲁棒性。关键词:无线传感器网络,节点定位,矩阵补全,范数正则化IAbstractIn recent years, wireless sensor networks gained rapid development, and has brought a revolution of information perception by its low-cost, large-scale and self-org
7、anization features.In WSNs, the location information of sensor nodes is essential for a variety of applications. Therefore, how to achieve precise localization is one of the key technologies of WSNs. Existing WSN nodelocalization algorithms still have defects o
8、n localization accuracy, robustness and localization costs. A deep research and discussion is made in this paper based on the matrix completion theory in Compressed Sensing