TDoA Based Positioning using Ultrasound Signals and Wireless Nodes

TL;DR

This paper presents a TDoA-based ultrasound positioning method using wireless nodes, addressing synchronization issues with a correction algorithm to improve accuracy in range and position estimation.

Contribution

The paper introduces a novel TDoA positioning approach with an algorithm to correct synchronization errors, enhancing ultrasound-based localization accuracy.

Findings

Identified synchronization as a key source of inaccuracy

Developed a correction algorithm for synchronization errors

Demonstrated improved positioning accuracy with the proposed method

Abstract

In this paper, a positioning technique based on Time Difference of Arrival (TDoA) measurements is analyzed. The proposed approach is designed to consent range and position estimation, using ultrasound transmissions of a stream of chirp pulses, received by a set of wireless nodes. A potential source of inaccuracy introduced by lack of synchronization between transmitting node and receiving nodes is identified and characterized. An algorithm to identify and correct such inaccuracies is presented.