CAJ | 학술논문

该文根据接收信号强度指示的测距特性，改进四边测距，并提出一种改进的加权质心定位算法。首先引入统计中值加权的方法，有效地降低了采集 RSSI 信号时的测量误差。然后运用Euclidean节点定位算法，改进四边测距算法。为进一步提高精度，对WSN定位技术中关于未知节点近似位置的算法做了修正，并对加权质心定位算法中的加权因子进行了优化，使未知节点的定位精度更加精确。相比之前的许多加权质心定位算法，仿真结果表明，改进的质心定位算法在定位精度方面有很大的提高，鲁棒性也较高。
해문근거접수신호강도지시적측거특성，개진사변측거，병제출일충개진적가권질심정위산법。수선인입통계중치가권적방법，유효지강저료채집 RSSI 신호시적측량오차。연후운용Euclidean절점정위산법，개진사변측거산법。위진일보제고정도，대WSN정위기술중관우미지절점근사위치적산법주료수정，병대가권질심정위산법중적가권인자진행료우화，사미지절점적정위정도경가정학。상비지전적허다가권질심정위산법，방진결과표명，개진적질심정위산법재정위정도방면유흔대적제고，로봉성야교고。
Based on the performance of received signal strength indicator ( RSSI ) , this paper proposes a improved four sides ranging and weighted centroid localization algorithm .First, introduce statistical middle value weighting method to effectively reduce the measurement errors in the acquisition of the RSSI signal . Then , use the Euclidean node positioning algorithm to improve four sides ranging algorithm .In order to further improve the accuracy , we amended localization the algorithm about the approximate position of the unknown node of the WSN , and optimized the weighting factors in the weighted centroid localization algorithm , so that it enables more precise positioning accuracy of the unknown node .Compared to the previous weighted centroid localization algorithm , this paper's simulation results show that the improved weighted centroid localization algorithm greatly improved the positioning accuracy , higher robustness .