【摘要】 现有的无线传感器网络定位算法未考虑非直达波误差,由于无线传感器网络中任意两节点之间都可能存在通信,因此其定位问题比无线蜂窝通信系统更为复杂。为了解决现有节点定位算法未考虑非直达波误差的问题,依据分布式节点定位体系结构,提出非直达波环境下的基于几何特性的节点定位算法。该算法将不等式约束、非直达波统计特征和稳健代价函数等非直达波抑制准则,与无线传感器节点定位手段如距离测量矩阵相结合,仿真结果表明,它在无线传感器网络定位应用中要优于其他的定位算法。更多还原

【Abstract】 The existing node localization methods are based on line-of-sight( LOS) assumption. The problem of sensor localization in a WSNs location system becomes more complex since the range measurements among all sensors are used rather than limited measurements between a blindfolded device and reference device for a cellular location system. To solve the problems of the existing sensor location methods which have the low positioning accuracy and high computational burden,and without Non-line-of-sight( NLOS) error,and the performance analysis is only suitable for special situations,a novel node localization method based on the proposed node localization structure is derived for NLOS propagation environment. Since the proposed method interweaves inequality constraints,robust cost function,statistical characteristics of NLOS propagation and all of range measurements,the simulation results show that it can perform better than the existing method only considering LOS situation.更多还原