计算机工程与设计
計算機工程與設計
계산궤공정여설계
COMPUTER ENGINEERING AND DESIGN
2014年
12期
4061-4067
,共7页
定位算法%虚拟节点%定位精度%贴近度%计算复杂度
定位算法%虛擬節點%定位精度%貼近度%計算複雜度
정위산법%허의절점%정위정도%첩근도%계산복잡도
localization algorithm%virtual node%location accuracy%approach degree%computing complex
针对无线传感器网络中定位精度低等问题，设计并实现一套基于贴近度的定位系统（ADLS ）。利用内测点法初步估计未知节点所在区域，利用最大最小贴近度计算出最佳虚拟节点，通过求质心来确定未知节点位置。利用虚拟节点一定程度上降低多径、绕射等信号强度的干扰和网络成本，利用贴近度将未知节点与虚拟节点结合起来，避免一些算法中存在的误差累积等问题。实验结果表明， ADLS具有良好的性能，适用于无线传感器网络应用。
針對無線傳感器網絡中定位精度低等問題，設計併實現一套基于貼近度的定位繫統（ADLS ）。利用內測點法初步估計未知節點所在區域，利用最大最小貼近度計算齣最佳虛擬節點，通過求質心來確定未知節點位置。利用虛擬節點一定程度上降低多徑、繞射等信號彊度的榦擾和網絡成本，利用貼近度將未知節點與虛擬節點結閤起來，避免一些算法中存在的誤差纍積等問題。實驗結果錶明， ADLS具有良好的性能，適用于無線傳感器網絡應用。
침대무선전감기망락중정위정도저등문제，설계병실현일투기우첩근도적정위계통（ADLS ）。이용내측점법초보고계미지절점소재구역，이용최대최소첩근도계산출최가허의절점，통과구질심래학정미지절점위치。이용허의절점일정정도상강저다경、요사등신호강도적간우화망락성본，이용첩근도장미지절점여허의절점결합기래，피면일사산법중존재적오차루적등문제。실험결과표명， ADLS구유량호적성능，괄용우무선전감기망락응용。
Aiming at the low positioning accuracy problem of localization in the wireless sensor network ,a localization system based on the approach degree (ADLS) was proposed .In the system ,the PIT was used to estimate unknown node areas ,and the biggest‐smallest approach degree was used to calculate the best virtual beacon nodes .Then the centroid was calculated to deter‐mine the unknown node position .The virtual beacon node was utilized to reduce the interference caused by signal strengths inclu‐ding the multi‐path and the diffraction as well as to reduce network costs to a certain extent .Unknown nodes and virtual nodes were combined using the approach degree to avoid overlapped errors in some algorithms .Experimental results show that ADLS improves the localization accuracy significantly and it is suitable for applications in WSN .
