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A High-Accuracy DOA-Based Localization Method: UAV Virtual Multiantenna Array

Authors:
Jianqiao Cheng
Ke Guan
François Quitin

Keywords: Direction Finding, DoA Estimation, Localization, Multi-antenna System, Radiogoniometry

Abstract:
Reliable location-aware services and corresponding localization techniques are essential in Unmanned Aerial Vehicle (UAV) communications. In this paper, localization technology based on Direction of Arrival estimation is proved to be promising for UAV channels due to limited angular spread in the air. Then, a method is proposed to estimate the direction of a ground radio-frequency transmitter by using a UAV equipped with a single antenna, which is critical when considering the form factor and computational capabilities of a UAV. By considering the received signal at several points along its trajectory, the receiver implicitly creates a virtual multi-antenna array, which can be used to estimate the direction of the transmitter. The first difficulty is estimating the relative positions of the UAV. The other main challenge is the Local Oscillator frequency offset between the transmitter and the UAV receiver, which adds an additional cumulative phase offset to the received signal at each antenna of the virtual array.

Pages: 10 to 15

Copyright: Copyright (c) IARIA, 2021

Publication date: July 18, 2021

Published in: conference

ISSN: 2308-4219

ISBN: 978-1-61208-878-5

Location: Nice, France

Dates: from July 18, 2021 to July 22, 2021