论文标题
通过信号定时优化降低双向范围差异
Reducing Two-Way Ranging Variance by Signal-Timing Optimization
论文作者
论文摘要
具有不同时钟的收发器之间的基于飞行时间的范围需要适应不同时钟速率的协议。双面双向范围（DS-TWR）由于其准确性而被广泛采用作为标准协议；但是，DS-TWR的精度尚未清楚地解决。在本文中，DS-TWR方差的分析模型是用户程序响应延迟的函数得出的，然后将其与CRAMER-RAO下限（CRLB）进行比较。然后将其用于在响应延迟上提出优化问题，以最大程度地利用从范围测量中获得的信息。派生的分析方差模型和优化协议通过2个范围的UWB收发器进行了实验验证，其中收集了2900万个范围测量。
Time-of-flight-based ranging among transceivers with different clocks requires protocols that accommodate varying rates of the clocks. Double-sided two-way ranging (DS-TWR) is widely adopted as a standard protocol due to its accuracy; however, the precision of DS-TWR has not been clearly addressed. In this paper, an analytical model of the variance of DS-TWR is derived as a function of the user-programmed response delays, which is then compared to the Cramer-Rao Lower Bound (CRLB). This is then used to formulate an optimization problem over the response delays in order to maximize the information gained from range measurements. The derived analytical variance model and optimized protocol are validated experimentally with 2 ranging UWB transceivers, where 29 million range measurements are collected.
