计算机工程与应用
計算機工程與應用
계산궤공정여응용
COMPUTER ENGINEERING AND APPLICATIONS
2013年
14期
88-91
,共4页
非视距传播%圆盘散射模型%到达时间%到达角%定位
非視距傳播%圓盤散射模型%到達時間%到達角%定位
비시거전파%원반산사모형%도체시간%도체각%정위
Non-Line-Of-Sight(NLOS)%Disk of Scatterers Model(DSM)%Time Of Arrival(TOA)%Angle Of Arrival(AOA)%location
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。
在非視距傳播(NLOS)環境下,基于圓盤散射模型來構造和引入NLOS誤差符閤實際的多徑通信場景。利用已知錨傳感器節點測量得到的電波到達時間和電波到達角等信息對未知節點位置進行定位估計。將圓盤散射模型細化為兩種建模,即以未知節點為中心的散射體圓盤模型和以錨節點為中心的散射體圓盤模型,對各模型有針對性的提齣定位思路和方法。進行計算機倣真,實驗結果錶明所提齣的定位方法較傳統的多種定位法具有更小的定位誤差,定位精度較高。同時所提齣的定位法不受圓盤散射半徑的增大對定位誤差的噁化影響,魯棒性較好,適用麵廣。
재비시거전파(NLOS)배경하,기우원반산사모형래구조화인입NLOS오차부합실제적다경통신장경。이용이지묘전감기절점측량득도적전파도체시간화전파도체각등신식대미지절점위치진행정위고계。장원반산사모형세화위량충건모,즉이미지절점위중심적산사체원반모형화이묘절점위중심적산사체원반모형,대각모형유침대성적제출정위사로화방법。진행계산궤방진,실험결과표명소제출적정위방법교전통적다충정위법구유경소적정위오차,정위정도교고。동시소제출적정위법불수원반산사반경적증대대정위오차적악화영향,로봉성교호,괄용면엄。
Under the NLOS(Non-Line-Of-Sight propagation)environments in wireless sensor networks, using the Disk of Scat-terers 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.