CAJ | 학술논문

为了提高单目标定位的精度，以到达时间差为物理量，提出了一种两步最小二乘定位算法（TSLS）．TSLS 首先基于普通线性最小二乘估计模型，采用线性纠正最小二乘定位算法（LCLS）获得目标节点位置的估计值；然后计算出目标节点到达不同基站的距离差，并用该距离差来近似实际距离差；最后基于约束总体最小二乘估计模型，利用约束总体最小二乘定位算法（CTLS）对目标节点位置进行二次估计．由于 TSLS 本质上是通过减少 CTLS 的矩阵误差来提高 CTLS 的性能，因此可以看成是一种增强型 CTLS 算法．仿真分析表明，TSLS 算法的总体性能要优于 CTLS算法和 LCLS 算法．
위료제고단목표정위적정도，이도체시간차위물리량，제출료일충량보최소이승정위산법（TSLS）．TSLS 수선기우보통선성최소이승고계모형，채용선성규정최소이승정위산법（LCLS）획득목표절점위치적고계치；연후계산출목표절점도체불동기참적거리차，병용해거리차래근사실제거리차；최후기우약속총체최소이승고계모형，이용약속총체최소이승정위산법（CTLS）대목표절점위치진행이차고계．유우 TSLS 본질상시통과감소 CTLS 적구진오차래제고 CTLS 적성능，인차가이간성시일충증강형 CTLS 산법．방진분석표명，TSLS 산법적총체성능요우우 CTLS산법화 LCLS 산법．
In order to improve the localization precision for a single object,a two-step least square localization algorithm (TSLS)is proposed based on the time difference of arrival.The object loca-tion is first estimated by the line correct least square algorithm (LCLS)based on the common least square estimation model.Then the distance difference from the object to different base stations is computed based on the estimated location.Finally,the location is estimated by the constrained total least square algorithm (CTLS)based on the constrained total least square model,in which the dis-tance difference is approximated not by the measurement but by the calculation.Essentially,TSLS improves the performance of CTLS by reducing the errors in the matrix of CTLS,so it can be seen as an enhanced CTLS algorithm.Simulation results show that the performance of the TSLS is better than that of the CTLS and LCLS.