蜂窝无线网中的写作定位算法研究

Cooperative Positioning Algorithm Research in Radio Cellular Networks

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 radio cellular networks, Single base station location is the most simple positioning method, that need to use a base station to measure mobile terminal TOA and DOA information. But Non line- of- sight error is the main reason for the position precision effect, in order to restrain NLOS to the influence of the positioning precision, and puts forward a kind of use of Coordination information between mobile terminal and relay node to enhance the accuracy of the positioning algo- rithm. The algorithm through the processing base station measurement TOA/AOA information, and mobile terminal to relay node TOA information, use the Coordination information between mobile ter- minal and relay node to correct the estimated position of the MS. The simulation result shows that, in a single base station cellular networks, the proposed algorithm can not only improve the system o- verall positioning performance, but also in MS is far away from the base station, the position preci- sion of the proposed cooperation localization algorithm is increased significantly than the existing al- gorithm.