发表机构
Chiba Institute of Technology（千叶工业大学）
机构由 AI 辅助整理，请以论文原文为准。AI 中文总结
针对智能手机行人定位精度低的问题，提出一种外部GNSS信号再辐射增强器，通过提升信号质量和相位跟踪稳定性，实现厘米级定位。
AI 中文摘要
利用智能手机内置的全球导航卫星系统（GNSS）进行高精度定位，是人行道级行人导航和精确定位应用的需求。然而，目前智能手机对行人的定位精度仍处于米级。这主要是因为智能手机中紧凑型线极化（LP）天线的局限性增加了GNSS观测噪声，并阻碍了稳定的载波相位跟踪。在本文中，我们提出了一种外部GNSS信号再辐射系统，该系统在仍使用智能手机内置GNSS接收机和天线的情况下，提升了智能手机的GNSS观测质量。该系统直接连接一个紧凑型有源螺旋天线和一个薄型无源贴片天线进行再辐射，并设计为可直接附着在智能手机上。所提出的GNSS增强器实现了：（1）通过增加接收信号强度来降低热噪声并实现稳定的信号跟踪，（2）与线极化天线相比，改善了多径鲁棒性，以及（3）稳定了天线相位中心变化。静态实验证实，与标准智能手机定位相比，GNSS载波相位测量的观测质量有了显著提高。此外，在行人实验中，所提出的增强器实现了稳定的载波相位整数模糊度解算，利用智能手机实现了厘米级定位。
英文摘要
High-precision positioning using the global navigation satellite system (GNSS) embedded in smartphones is demanded for sidewalk-level pedestrian navigation and pinpoint location-based applications. However, current smartphone positioning accuracy for pedestrians remains at the meter level. This is mainly because limitations of the compact linearly polarized (LP) antenna in smartphones increase GNSS observation noise and hinder stable carrier phase tracking. In this paper, we propose an external GNSS signal re-radiation system that boosts smartphone GNSS observation quality while still using the smartphone's built-in GNSS receiver and antenna. The system directly connects a compact active helical antenna and a thin passive patch antenna for re-radiation, and is designed to be attached directly to the smartphone. The proposed GNSS booster achieves (1) reduced thermal noise and stable signal tracking via increased received signal strength, (2) improved multipath robustness compared with a LP antenna, and (3) stabilization of antenna phase center variation. Static experiments confirm a substantial improvement in the observation quality of GNSS carrier phase measurements compared with standard smartphone positioning. Furthermore, in pedestrian experiments, the proposed booster enabled stable carrier phase integer ambiguity resolutions, achieving centimeter-level positioning using a smartphone.
CommentsAccepted to the ION 2026 Pacific PNT Meeting
Journal refProceedings of the ION 2026 Pacific PNT Meeting, Honolulu, Hawaii, April 2026, pp. 512-524
