Abstract: Under the NLOS（Non-Line-Of-Sight propagation） environments in wireless sensor networks, using the Disk of Scatterers Model（DSM） to construct and introduce the NLOS errors is line with the actual multi-path communication scenarios. A localization method using TOA（Time Of Arrival） and AOA（Angle Of Arrival） measured by the anchor nodes based on the DSM is proposed in this paper. It models the DSM as two models, that is unknown node-oriented disk of scatterers model and anchor node-oriented disk of scatterers model. It proposes the location methods for each model. Computer simulations have been done to show that the proposed location methods can restrain NLOS error effectively, and have better location accuracy than the traditional location algorithms. Meanwhile, the proposed location methods can not be affected by the deterioration of the positioning error when increasing the radius of DSM and are applicable to a wide range.

Key words: Non-Line-Of-Sight（NLOS）, Disk of Scatterers Model（DSM）, Time Of Arrival（TOA）, Angle Of Arrival（AOA）, location

摘要： 在非视距传播（NLOS）环境下，基于圆盘散射模型来构造和引入NLOS误差符合实际的多径通信场景。利用已知锚传感器节点测量得到的电波到达时间和电波到达角等信息对未知节点位置进行定位估计。将圆盘散射模型细化为两种建模，即以未知节点为中心的散射体圆盘模型和以锚节点为中心的散射体圆盘模型，对各模型有针对性的提出定位思路和方法。进行计算机仿真，实验结果表明所提出的定位方法较传统的多种定位法具有更小的定位误差，定位精度较高。同时所提出的定位法不受圆盘散射半径的增大对定位误差的恶化影响，鲁棒性较好，适用面广。

关键词: 非视距传播, 圆盘散射模型, 到达时间, 到达角, 定位