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Super-Resolution-Based DOA Estimation with Wide Array Distance and Extrapolation for Vital FMCW Radar

Title
Super-Resolution-Based DOA Estimation with Wide Array Distance and Extrapolation for Vital FMCW Radar
Authors
Kim, SangdongKim, BongseokJin, YoungseokLee, Jonghun
DGIST Authors
Kim, Sangdong; Kim, Bongseok; Jin, Youngseok; Lee, Jonghun
Issue Date
2021-01
Citation
Journal of Electromagnetic Engineering and Science, 21(1), 23-34
Type
Article
Author Keywords
Array DistanceDBFDOASuper-ResolutionVital FMCW Radar
Keywords
LOCALIZATION
ISSN
2671-7255
Abstract
This paper proposes a super-resolution-based direction-of-arrivals (DOA) estimation with wide array distance and extrapolation for vital frequency-modulated continuous-wave (FMCW) radar. Most super-resolution algorithms employ the distance between adjacent arrays of half a wavelength, i.e., λ/2. Meanwhile, in the case of narrow field of view of FMCW radar, the resolution of the angle is maintained by increasing the spacing between the arrays even if the number of arrays decreases. In order to employ these characteristics of array spacing and resolution, the proposed algorithm confirms whether or not to use the case where the distance between the adjacent arrays is greater than λ/2. In the case of an array distance >λ/2, a super-resolution algorithm is performed to obtain the enhanced DOA resolution. Moreover, the proposed algorithm virtually generates data between antennae by using extrapolation in order to further improve the performance of the resolution. The simulation results show that the proposed algorithm achieves the results of root-mean-square error similar to conventional super-resolution algorithms while maintaining low complexity. In order to further verify the performance of the proposed estimation algorithm, we demonstrate its employment in practice: experiments in a chamber room and an indoor room were conducted. © 2020, The Korean Institute of Electromagnetic Engineering and Science. All Rights Reserved.
URI
http://hdl.handle.net/20.500.11750/13869
DOI
10.26866/jees.2021.21.1.23
Publisher
KOREAN INST ELECTROMAGNETIC ENGINEERING & SCIENCE
Related Researcher
Files:
There are no files associated with this item.
Collection:
Division of Automotive Technology1. Journal Articles
Division of Automotive TechnologyAdvanced Radar Tech. Lab1. Journal Articles


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