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使用增强组合变形卡尔曼波器进行行人定位
1Department of Software, Sangmyung University, Cheonan-si 31066, Republic of Korea.
Sensors (Basel, Switzerland)
|August 12, 2023
概括
这项研究介绍了QETKF,这是一个改进的卡尔曼波器,用于室内定位,使用行人死亡计算 (PDR) 和接收信号强度 (RSS) 指纹. 通过计算模型错误,QETKF提高了准确性,超过了现有的方法.
科学领域:
- 室内定位系统 室内定位系统
- 国家估计.
- 传感器融合式传感器
背景情况:
- 全球定位系统 (GPS) 在室内不可用,需要使用替代定位方法.
- 现有的室内定位依赖于来自惯性测量单元 (IMU) 的传感器数据和无线信号 (例如,PDR,RSS指纹).
- 贝叶斯波器通常用于融合来自PDR和RSS指纹的杂位置数据.
研究的目的:
- 提出和评估一种新的增强状态估计方法,QETKF,用于室内行人定位.
- 通过纳入模型错误考虑来解决集成转换卡尔曼波器 (ETKF) 的局限性.
- 调查QETKF的可行性,以使用PDR和RSS指纹进行准确的行人位置估计.
主要方法:
- 开发了QETKF,一种增强的ETKF变体,作为室内定位的贝叶斯波器.
- 从PDR与RSS指纹测量使用集体转换的融合预测位置.
- 在状态预测模型中包含模型错误,与标准ETKF不同.
主要成果:
- 与ETKF和其他集成式卡尔曼过器 (EBKF) 相比,QETKF显示了更准确的定位结果.
- 拟议的QETKF通过考虑模型错误,有效地避免系统地低估错误协变率.
- 在基于智能手机的室内定位系统上进行的实验验证了QETKF的性能.
结论:
- QETKF显示了改善室内行人定位准确性的巨大潜力.
- 使用QETKF精确的错误共变率估计导致了优越的位置估计性能.
- 该方法适用于基于智能手机的室内定位系统,利用PDR和RSS数据.
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