Resonant Beam Multi-Target DOA Estimation
Abstract
With the increasing demand for internet of things (IoT) applications, especially for location-based services, how to locate passive mobile targets (MTs) with minimal beam control has become a challenge. Resonant beam systems are considered promising IoT technologies with advantages such as beam self-alignment and energy concentration. To establish a resonant system in the radio frequency (RF) band and achieve multi-target localization, this paper designs a multi-target resonant system architecture, allowing a single base station (BS) to independently connect with multiple MTs. By employing a retro-directive array, a multi-channel cyclic model is established to realize one-to-many electromagnetic wave propagation and MT direction-of-arrival (DOA) estimation through echo resonance. Simulation results show that the proposed system supports resonant establishment between the BS and multiple MTs. This helps the BS to still have high DOA estimation accuracy in the face of multiple passive MTs, and can ensure that the DOA error is less than 1 degree within a range of 6 meters at a 50degree field of view, with higher accuracy than active beamforming localization systems.
Cite
@article{arxiv.2412.15597,
title = {Resonant Beam Multi-Target DOA Estimation},
author = {Yixuan Guo and Qingwei Jiang and Mingliang Xiong and Wen Fang and Mingqing Liu and Qingqing Zhang and Qingwen Liu and Gang Yan},
journal= {arXiv preprint arXiv:2412.15597},
year = {2025}
}