超宽带范围错误缓解与新道脉冲响应特征参数和双步非视线识别
Hongchao Yang1, Yunjia Wang1, Shenglei Xu2
1The Key Laboratory of Land Environment and Disaster Monitoring, China University of Mining and Technology, Xuzhou 221116, China.
Sensors (Basel, Switzerland)
|March 13, 2024
概括
本研究介绍了一种高效的超宽带 (UWB) 策略,以减轻非视线 (NLOS) 距离错误,以实现精确的室内定位. 该方法通过识别和纠正NLOS错误,显著提高了准确性,超过了现有的技术.
科学领域:
- 机器人和自动化 机器人和自动化
- 信号处理 信号处理
- 室内导航系统 室内导航系统
背景情况:
- 室内环境中的高精度定位受到非视线 (NLOS) 距离错误的挑战.
- 超宽带 (UWB) 技术提供了准确室内定位的潜力,但易受NLOS错误的影响.
研究的目的:
- 提出一种有效的策略,用于识别和减轻UWB系统中的NLOS距离错误,以改善室内定位.
- 开发一种两步NLOS识别方法,并结合新道脉冲响应参数进行错误校正.
主要方法:
- 一个两步的NLOS识别过程,使用决策树和前神经网络.
- 将NLOS错误分为三种类型,并采用定制的缓解和召回策略.
- 将缓解策略扩展到部分视线 (LOS) 错误.
主要成果:
- 实现了95.05%的NLOS平均识别准确率和95.72%/94.15%的LOS/NLOS召回率.
- 减少了50.4%的LOS错误,并提高了NLOS范围错误精度,平均为61.8% (高达76.84%).
- 总的来说,LOS和NLOS的距离误差分别减少了25.19%和69.85%,导致定位精度提高了54.46%.
结论:
- 拟议的UWB距离错误缓解策略有效地提高了室内定位准确度.
- 与CNN,LSTM-EKF,LS-SVM和K-NN等最先进的技术相比,这种方法显示出更高的性能.
- 该策略提供了一个强大的解决方案,用于在具有NLOS条件的具有挑战性的室内环境中精确定位.
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