基于网格的无线网络室内协作定位算法

Indoor cooperation localization algorithm based grid in wireless networks

针对室内定位精度低的问题,通过多种无线网络间的协作定位,提出一种基于网格的无线网络室内协作定位算法.与区域单一定位方式不同,该算法将信号覆盖区域划分为网格的形式,获取多种信号信息,以判断网格的可定位性,并为网格内所有网络分配权值,判定是否可进行多种网络的协作定位,给出最优定位组合方案.只须在离线阶段采集室外网络信号,扩充协作定位指纹库,该算法即可直接扩展到室外定位.仿真结果表明:与单一网络定位算法以及等权分配算法相比,提出的方案不仅有效提高了定位精度,而且提高了网络覆盖区域的可定位率.

To improve the low indoor localization accuracy,agrid-based indoor cooperation localization algorithm（GICLA）in wireless networks was proposed through collaborative localization of heterogeneous networks.A signal covering region was divided into several grids,many kinds of signal information of these networks were gotten,and the localization ability of grids was judged,which was different from single localization mode in all regions.GICLA assigned different weight to each network in each grid,determined whether multi-networks were cooperative,and analyzed and obtained the optimal localization combination scheme.Moreover,GICLA can also be applied to outdoor localization directly when it collects outdoor signals of different networks in offline phase and expands the cooperation localization fingerprint database.Simulation results show that GICLA outperforms single network localization algorithm and the equal weight allocating algorithm.GICLA improves localization accuracy and localization ability rate of the covered region.