强大的室内定位与智能手机通过使用编码的声声学信号.
Bingbing Cheng1, Ying Huang2,3, Chuanyi Zou4
1State Key Laboratory of Information Engineering in Surveying, Mapping and Remote Sensing, Wuhan University, Wuhan 430079, China.
Sensors (Basel, Switzerland)
|October 16, 2024
概括
一个新的声学定位系统,RATBILS,通过智能手机提供准确的室内定位. 这种方法优于传统技术,在各种室内环境中达到厘米级准确度.
科学领域:
- 导航和定位 导航和定位
- 声学信号处理 声学信号处理
- 室内定位技术 室内定位技术
背景情况:
- 室内定位是导航的关键研究领域.
- 基于声信号的定位提供了高精度,低成本和智能手机兼容性.
- 现有的方法在复杂的室内环境中面临准确性和稳定性的挑战.
研究的目的:
- 提出一种新的声学定位方法,称为RATBILS (声学定位系统).
- 为了提高室内定位的准确性和稳定性,使用编码的声声学信号.
- 为了评估与传统方法相比,RATBILS的性能.
主要方法:
- 使用由基站传输的编码的声声学信号.
- 在智能手机上实施三步过程:预处理,到达时间 (TOA) 估计和到达时间差 (TDOA) 计算.
- 采用带通波器来降低噪声和信号解码来锁定源.
- 利用粗细检测进行可靠的TOA估计,强调首次到达并减轻多路径/非视线 (NLOS) 效应.
主要成果:
- 在第1场景,第1区域,RATBILS在92%的位置上实现了0.23米的定位误差,超过了传统方法.
- 在场景1,区域2实现了0.56米的定位误差92%也优于传统方法.
- 在场景2中,最大的平均定位误差为1.26米,明显优于传统方法的3.33米和3.87米.
结论:
- 拟议的RATBILS系统在室内声学定位方面表现出卓越的性能.
- 该方法提供了准确而强大的定位,即使在具有挑战性的NLOS条件下.
- RATBILS代表了基于智能手机的室内导航系统的重大进步.
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