激光杂志
激光雜誌
격광잡지
LASER JOURNAL
2014年
12期
144-147
,共4页
无线传感网络%室内定位%接收信号强度指示%锚节点%全球定位系统
無線傳感網絡%室內定位%接收信號彊度指示%錨節點%全毬定位繫統
무선전감망락%실내정위%접수신호강도지시%묘절점%전구정위계통
wireless sensor networks%indoor localization%received signal strength indication%anchor node%glob_al positioning system
为了提高室内环境节点定位精度，针对传统定位算法的不足，提出一种改进接收信号强度指示的室内定位算法。首先通过神经网络对各锚节点接收信号强度的权值进行拟合，得到路径损耗模型的参数值，然后利用最大似然法对未知节点进行定位，最后采用仿真实验测试其性能。结果表明，相对其它室内定位算法，本文算法提高了室内定位的精度，降低了平均定位误差，可以满足室内定位的实时性要求。
為瞭提高室內環境節點定位精度，針對傳統定位算法的不足，提齣一種改進接收信號彊度指示的室內定位算法。首先通過神經網絡對各錨節點接收信號彊度的權值進行擬閤，得到路徑損耗模型的參數值，然後利用最大似然法對未知節點進行定位，最後採用倣真實驗測試其性能。結果錶明，相對其它室內定位算法，本文算法提高瞭室內定位的精度，降低瞭平均定位誤差，可以滿足室內定位的實時性要求。
위료제고실내배경절점정위정도，침대전통정위산법적불족，제출일충개진접수신호강도지시적실내정위산법。수선통과신경망락대각묘절점접수신호강도적권치진행의합，득도로경손모모형적삼수치，연후이용최대사연법대미지절점진행정위，최후채용방진실험측시기성능。결과표명，상대기타실내정위산법，본문산법제고료실내정위적정도，강저료평균정위오차，가이만족실내정위적실시성요구。
In order to improve the node positioning accuracy of indoor environment, this paper proposed an indoor location algorithm based on improved received signal strength indicator to solve he defects of traditional location algo_rithms. Firstly, the weights of received signal strength indication of each anchor node is fitted by BP neural network to get parameter values of the path loss model, and then the unknown node is localized by using the maximum likelihood method, finally the simulation experiment is carried out to test its performance. The results show that compared with other indoor localization algorithms, the proposed algorithm can improve positioning precision, reduce the average posi_tioning error, and can meet the real-time requirements of indoor localization.
