移动轨迹链式射频指纹图训练

The Construction of Radio-map Based on Movement Track Chain

射频指纹图的离线训练工作强度大是限制室内节点定位的主要因素,提出了移动轨迹链式射频指纹图的离线训练方法。通过实际实验,得出了基于测距的定位方法和插值训练方法存在较大的误差。并与Radar系统的进行比较后,得出通过移动轨迹链式射频指纹训练不论是平均定位精度或是单次定位误差概率上都具有优势。同时离线训练强度是Radar系统的0.25%,有利于进行射频指纹图的快速构造和室内节点的定位。

The construction of radio-map is one of the many factors to limit indoor position.so,movement track chain was used to build radio-map.Through the actual experiment,the conclusion was drawn that the result of range-based positioning method and training method based on interpolation algorithm can not meet the requirements.By comparing with the radar system,the positioning result of radio-map based on mobile track chain is more accurate,and the off-line training intensity is 0.25%.As a result,the radio-map can be constructed rapidly and used to positioning.