Outdoor sub-THz Position Location and Tracking using Field Measurements at 142 GHz

TL;DR

This paper demonstrates centimeter-level outdoor positioning accuracy at 142 GHz using field measurements and an extended Kalman filter, highlighting the potential of sub-THz frequencies for precise location tracking in urban environments.

Contribution

It introduces a map-based position location algorithm using real measurement data at 142 GHz, achieving high accuracy in outdoor urban microcell scenarios.

Findings

Mean accuracy of 24.8 cm over 34 locations

Effective tracking with EKF using AoA and ToF measurements

Successful outdoor positioning in line-of-sight and non-line-of-sight conditions

Abstract

Future sub-THz cellular deployments may be utilized to complement the coverage of the global positioning system (GPS) and provide centimeter-level accuracy. In this work, we use measurement data at 142 GHz to test a map-based position location algorithm in an outdoor urban microcell (UMi) environment. We utilize an extended Kalman filter (EKF) to track the position of the user equipment (UE) along a rectangular track, with the transmitter-receiver separation distances varying from 24.3 m to 52.8 m. The position and velocity of the UE are tracked by the EKF, with measurements of the angle of arrival and time of flight information obtained along an outdoor track, to provide a mean accuracy of 24.8 cm at 142 GHz, over 34 UE locations, using a single base station in line-of-sight and non-line-of-sight.