CAJ | 학술논문

针对复杂室内环境下视距（line of sight，LOS）和非视距（not line of sight，NLOS）并存的三维混合定位技术进行了研究。在 LOS 环境下，基于到达时间差（time difference of arrival，TDOA）定位算法优于其他定位技术；但受到室内环境尤其是 NLOS 环境下的多径效应，TDOA 定位的精准度大大减弱。若能够正确评估传播衰减系数以此补偿多径效应带来的影响，那么基于接收信号强度（received signal strength，RSS）定位算法受到 NLOS 多径效应的影响将大大减小。提出了三维混合加权最小二乘（hybrid weighted least square，HWLS）RSS ／TDOA 算法，通过使用 Nakagami-m 分布鉴定当前信道是 LOS ／NLOS 路径，用于室内环境下的目标定位，并通过实验验证该算法提高了定位精度。
침대복잡실내배경하시거（line of sight，LOS）화비시거（not line of sight，NLOS）병존적삼유혼합정위기술진행료연구。재 LOS 배경하，기우도체시간차（time difference of arrival，TDOA）정위산법우우기타정위기술；단수도실내배경우기시 NLOS 배경하적다경효응，TDOA 정위적정준도대대감약。약능구정학평고전파쇠감계수이차보상다경효응대래적영향，나요기우접수신호강도（received signal strength，RSS）정위산법수도 NLOS 다경효응적영향장대대감소。제출료삼유혼합가권최소이승（hybrid weighted least square，HWLS）RSS ／TDOA 산법，통과사용 Nakagami-m 분포감정당전신도시 LOS ／NLOS 로경，용우실내배경하적목표정위，병통과실험험증해산법제고료정위정도。
This paper investigated 3D positioning in an indoor line of sight (LOS)and nonline of sight (NLOS)combined en-vironment.It was a known fact that time-difference-of-arrival-(TDOA-)based positioning outperforms MS other techniques in LOS environments;however,multipath in an indoor environment,especially NLOS multipath,significantly decreased the accu-racy of TDOA positioning.On the other hand,received-signal-strength-(RSS-)based positioning was not affected so much by NLOS multipath as long as the propagation attenuation could be correctly estimated and the multipath effects had been compen-sated for.Based on the fact,it proposed a hybrid weighted least square (HWLS)RSS /TOA method for target positioning in an indoor LOS /NLOS environment.It implemented the identification of LOS /NLOS path by using Nakagami-m distribution.An ex-periment verifies our proposed scheme.