基于移动指纹采集的手机自适应压缩感知室内定位方法

Mobile Phone-Based Indoor Positioning Method using Adaptive Compressed Sensing for Walking-Surveyed Fingerprinting

  • 摘要: 基于接收信号强度指示指纹的定位方法需要预先建立定位区域指纹库,传统静态采集指纹库的建立更新需要大量的人力和时间并且定位一致性容易受终端差异(如指纹采集手机与定位手机硬件不同导致接收信号差异)影响,使得这种方法的大范围推广使用变得异常艰难。针对以上问题,本文通过移动行走过程中采集的RSSI指纹建立对应的移动采集指纹库,根据移动采集指纹特征构建特征向量,提出移动采集指纹稀疏特征表征,建立基于自适应压缩感知算法的指纹匹配室内定位模型。试验结果表明,指纹采集效率提升了90.83%,平均定位误差为1.96 m,均方根误差为2.75 m,定位一致性差异误差平均提高了32.67%。本文所提方法在指纹采集效率、定位精度及不同手机的定位一致性方面优于现有算法。

     

    Abstract: Objectives: The location method based on Received Signal Strength Indication (RSSI) fingerprint requires building a fingerprint database of the location area in the offline stage. The traditional static fingerprint collection method is time-consuming and labor-intensive to establish and update the fingerprint database, and the location consistency is easily affected by the terminal difference (such as the difference of the received signal caused by the different hardware of the fingerprint collection phone and the location phone), which hinders the large-scale application of this method. Methods: To address these problems, this paper collects RSSI fingerprints during mobile walking and builds a corresponding mobile collection fingerprint database, constructs feature vectors according to the characteristics of mobile collection fingerprints, proposes sparse feature representation of mobile collection fingerprints, and establishes a fingerprint matching indoor location model based on adaptive compressed sensing algorithm. Results: The experimental results show that the fingerprint collection efficiency is improved by 90.83%, the average location error is 1.96 meters, the root mean square error is 2.75 meters, and the location consistency difference error is improved by 32.67% on average. Conclusions: The method proposed in this paper outperforms the existing algorithms in terms of fingerprint collection efficiency, location accuracy and location consistency of different phones.

     

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