Design of the UWB Positioning System Simulator for LOS/NLOS Environments

Area of Science:

• Engineering
• Computer Science
• Telecommunications

Background:

• Ultra-Wideband (UWB) technology offers high positioning accuracy, data transferability, and security, making it suitable for smart cities and smart mobility.
• Accurate analysis of UWB positioning for moving objects requires high-precision ground truth data (millimeter accuracy).
• Existing UWB simulators lack the capability to model variable operational characteristics and distance-dependent effects found in real systems.

Purpose of the Study:

• To present a novel 2D UWB simulator designed for outdoor, open-air environments with obstacles.
• To develop a method for analyzing real UWB system data under line-of-sight (LOS) and non-line-of-sight (NLOS) conditions.
• To enable the creation of accurate virtual measurements for simulating UWB system performance in various locations and scenarios.

Main Methods:

• Development of a 2D UWB simulator for outdoor environments, incorporating obstacles.
• Data collection from a real UWB system at predefined outdoor reference distances under LOS and NLOS conditions.
• Statistical analysis involving fitting normal distributions to collected data and modeling position change impacts to simulate real UWB system behavior.
• Reconstruction of real test scenarios using time-dependent equations for paths and inequalities for obstacles to accurately model moving tags.

Main Results:

• The developed simulator accurately models real-world UWB system operation, including distance-dependent characteristics.
• The data analysis method allows for the simulation of UWB systems by creating virtual measurements based on real-world data.
• The approach enables high-accuracy reconstruction of test scenarios involving moving UWB tags in complex outdoor environments.

Conclusions:

• The presented 2D UWB simulator and data analysis method provide a valuable tool for virtual testing and performance evaluation of UWB systems.
• This approach significantly reduces the cost and time associated with traditional field testing of UWB systems in smart city applications.
• The simulator and methodology support the advancement of UWB technology by enabling more realistic and efficient system development and validation.