Among the various Ultra-wideband (UWB) ranging methods, the absence of uplink communication or centralized computation makes downlink time-difference-of-arrival (DL-TDOA) localization the most suitable for large-scale industrial deployments. However, temporary or permanent obstacles in the deployment region often lead to non-line-of-sight (NLOS) channel path and signal outage effects, which result in localization errors. Prior research has addressed this problem by increasing the ranging frequency, which leads to a heavy increase in the user device power consumption. It also does not contribute to any increase in localization accuracy under line-of-sight (LOS) conditions. In this paper, we propose and implement a novel low-power channel-aware dynamic frequency DL-TDOA ranging algorithm. It comprises NLOS probability predictor based on a convolutional neural network (CNN), a dynamic ranging frequency control module, and an IMU sensor-based ranging filter. Based on the conducted experiments, we show that the proposed algorithm achieves 50% higher accuracy in NLOS conditions while having 46% lower power consumption in LOS conditions compared to baseline methods from prior research.

本文提出并实施了一种新颖的低功耗、适应信道特性的动态频率下行到达差异时间测距算法，通过基于卷积神经网络（CNN）的NLOS概率预测器、动态测距频率控制模块和基于IMU传感器的测距滤波器，实验证明该算法在NLOS条件下的准确度比先前研究的基准方法提高了50%，在LOS条件下的功耗降低了46%。

自适应信道感知超宽带DL-TDOA的功耗效率室内定位