A Novel Approach to NLOS Identification in Sensor Localization
Sensor localization is a basic and important task of wireless sensor networks,and abundant localization algorithms have been proposed based on various ranging techniques,including time-of-arrival(TOA),time-difference-of-arrival(TDOA),received signal strength(RSS),angle-of-arrival(AOA)and etc.The accuracy of these ranging techniques rely on the line-of-sight(LOS)propagation of signals,while in practical environments,signals may be propagated in non-line-of-sight(NLOS)channels,with the result that both ranging and localization accuracy can be seriously degraded.In this paper,we consider TOA-based sensor localization and propose a novel NLOS identification method using Cayley-Menger determinant(CMD).To be specific,the errors induced by NLOS in distance measurements are positive and much larger than errors from TOA systems,and as a result,the values of corresponding CMD behave differently under LOS/NLOS channels.Hence,we leverage this character to establish a statistical hypothesis testing model to identify NLOS channels.Finally,a simulation analysis is conducted to verify the effectiveness of the proposed method.
Sensor Localization Non-Line-of-Sight Cayley-Menger Determinant Time-of-Arrival
Wenye Meng Baoqi Huang Guanglai Gao
College of Computer Science,Inner Mongolia University,Hohhot 010021,China College of Computer Science,Inner Mongolia University,Hohhot 010021,China;School of Electrical and E
国际会议
长沙
英文
876-880
2014-05-31（万方平台首次上网日期，不代表论文的发表时间）