Cited 4 time in webofscience Cited 5 time in scopus

Low-Complexity MUSIC-Based Direction-of-Arrival Detection Algorithm for Frequency-Modulated Continuous-Wave Vital Radar

Title
Low-Complexity MUSIC-Based Direction-of-Arrival Detection Algorithm for Frequency-Modulated Continuous-Wave Vital Radar
Authors
Kim, Bong-seokJin, YoungseokLee, JonghunKim, Sangdong
DGIST Authors
Kim, Bong-seok; Jin, Youngseok; Lee, JonghunKim, Sangdong
Issue Date
2020-08
Citation
Sensors, 20(15), 1-18
Type
Article
Article Type
Article
Author Keywords
FMCWarray spacinglow complexityMUSIC
Keywords
DOA ESTIMATION
ISSN
1424-8220
Abstract
This paper proposes a low complexity multiple-signal-classifier (MUSIC)-based direction-of-arrival (DOA) detection algorithm for frequency-modulated continuous-wave (FMCW) vital radars. In order to reduce redundant complexity, the proposed algorithm employs characteristics of distance between adjacent arrays having trade-offs between field of view (FOV) and resolution performance. First, the proposed algorithm performs coarse DOA estimation using fast Fourier transform. On the basis of the coarse DOA estimation, the number of channels as input of the MUSIC algorithm are selected. If the estimated DOA is smaller than 30◦, it implies that there is an FOV margin. Therefore, the proposed algorithm employs only half of the channels, that is, it is the same as doubling the spacing between arrays. By doing so, the proposed algorithm achieves more than 40% complexity reduction compared to the conventional MUSIC algorithm while achieving similar performance. By experiments, it is shown that the proposed algorithm despite the low complexity is enable to distinguish the adjacent DOA in a practical environment. © 2020 by the authors. Licensee MDPI, Basel, Switzerland.
URI
http://hdl.handle.net/20.500.11750/12541
DOI
10.3390/s20154295
Publisher
MDPI AG
Related Researcher
  • Author Lee, Jonghun Advanced Radar Tech. Lab
  • Research Interests Radar, AI, DL/ML, signal processing
Files:
Collection:
Division of Automotive TechnologyAdvanced Radar Tech. Lab1. Journal Articles
Division of Automotive Technology1. Journal Articles


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