基于改进克里金插值的室内定位位置指纹库构建方法

发布时间：2018-04-05 13:28

本文选题：室内定位　切入点：位置指纹　出处：《重庆邮电大学学报(自然科学版)》2017年06期

【摘要】：当今社会对基于位置服务尤其是室内位置服务的需求日益迫切。位置指纹法利用室内无线信号强度来进行定位,具有方便快捷、低成本等优势,但构建一个细粒度的位置指纹库需要耗费大量的人力和时间。为提高位置指纹库的构建效率,提出一种基于改进克里金插值的位置指纹库构建方法。通过部分测量数据结合克里金插值法进行插值,并利用模拟退火算法提高理论变异函数拟合精度,进而估计出未测量点处的信号强度,提高插值精度和指纹库的构建效率。实验表明:相比反距离加权插值和传统克里金插值,该方法不但具有较高插值和定位精度,而且可将指纹数据人工采集工作量降低50%。
[Abstract]:Nowadays, the demand for location-based services, especially indoor location-based services, is becoming more and more urgent.The location fingerprint method uses indoor wireless signal strength to locate, which has the advantages of convenience, fast and low cost, but it takes a lot of manpower and time to build a fine-grained location fingerprint database.In order to improve the construction efficiency of location fingerprint database, a new method based on improved Kriging interpolation is proposed.By using partial measurement data and Kriging interpolation, the simulated annealing algorithm is used to improve the fitting accuracy of theoretical variogram, and then the signal intensity of unmeasured points is estimated, and the interpolation accuracy and the efficiency of fingerprint database construction are improved.The experimental results show that the proposed method not only has higher interpolation and location accuracy than inverse distance weighted interpolation and traditional Kriging interpolation, but also reduces the workload of fingerprint data acquisition by 50%.
【作者单位】：重庆市工业学校网络信息中心;重庆邮电大学移动通信技术重点实验室;
【基金】：重庆市科委重点产业共性关键技术创新专项(cstc2015zdcy-ztzx40008)~~
【分类号】：TN925

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