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在蜂窝无线网络中,单基站定位是最简单易行的定位方法,其需要利用基站测量移动终端信号的到达时间(TOA,time of arrival)和到达角(AOA,Angle of Arrival)信息。但是非视距(NLOS,Non Line of Sight)误差是影响定位精度的主要原因,为了抑制NLOS对定位精度的影响,提出了一种利用移动终端和中继节点之间的协作信息来提高定位精度的算法。该算法通过处理基站测量的TOA/AOA信息,以及移动终端到中继节点的TOA信息,利用中继节点与MS间的协作信息对估计的位置进行修正。仿真分析结果表明,在单基站蜂窝网中,提出的算法不仅整体提高了系统定位性能,而且在MS距离基站比较远的情况下,提出的协作定位算法的定位精度比现有的算法有明显提高。
In cellular wireless networks, single base station positioning is the easiest positioning method that requires the use of a base station to measure the time of arrival (TOA) and angle of arrival (AOA) information of mobile terminal signals. However, the non-line-of-sight (NLOS) error is the main reason that affects the positioning accuracy. In order to suppress the influence of NLOS on the positioning accuracy, a method is proposed to improve the positioning accuracy by using the collaboration information between the mobile terminal and the relay node Algorithm. The algorithm corrects the estimated position by using the TOA / AOA information measured by the base station and the TOA information from the mobile terminal to the relay node, using the cooperation information between the relay node and the MS. Simulation results show that the proposed algorithm not only improves the system positioning performance in single-base station cellular network, but also improves the positioning accuracy of the proposed cooperative positioning algorithm significantly compared with the existing algorithms when the MS is far away from the base station .