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http://dx.doi.org/10.5515/KJKIEES.2019.30.2.152

Distance Sensing of Moving Target with Frequency Control of 2.4 GHz Doppler Radar  

Baik, Kyung-Jin (Department of Electrical Engineering, Kookmin University)
Jang, Byung-Jun (Department of Electrical Engineering, Kookmin University)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.30, no.2, 2019 , pp. 152-159 More about this Journal
Abstract
In general, a Doppler radar can measure only the velocity of a moving target. To measure the distance of a moving target, it is necessary to use a frequency-modulated continuous wave or pulse radar. However, the latter are very complex in terms of both hardware as well as signal processing. Moreover, the requirement of wide bandwidth necessitates the use of millimeter-wave frequency bands of 24 GHz and 77 GHz. Recently, a new kind of Doppler radar using multitone frequency has been studied to sense the distance of moving targets in addition to their speed. In this study, we show that distance sensing of moving targets is possible by adjusting only the frequency of a 2.4 GHz Doppler radar with low cost phase lock loop. In particular, we show that distance can be sensed using only alternating current information without direct current offset information. The proposed technology satisfies the Korean local standard for low power radio equipment for moving target identification in the 2.4 GHz frequency band, and enables multiple long-range sensing and radio-frequency identification applications.
Keywords
Doppler Radar; Distance Sensing; 2.4 GHz Radar; Multi-Tone Radar; Gesture Sensing;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
1 백경진, 장병준, "다중 도플러 레이다와 머신러닝을 이용한 손동작 인식," 한국전자파학회논문지, 28(1), pp. 33-41, 2017년 1월.   DOI
2 J. Lien, N. Gillian, M. E. Karagozler, P. Amihood, C. Schwesig, and E. Olsonet, et al., "Soli: Ubiquitous gesture sensing with millimeter wave radar," ACM Transactions on Graphics(TOG), vol. 35, no. 4, p. 142, 2016.
3 C. Nieh, C. Wei, and J. Lin "Concurrent detection of vibration and distance using unmodulated CW Doppler vibration radar with an adaptive beam-steering antenna," IEEE Transactions on Microwave Theory and Techniques, vol. 63, no. 6, pp. 2069-2078, Jun. 2017.   DOI
4 J. Huang, Y. Zhang, and S. Luo, "A simple estimator for localization of moving targets using dual-frequency radar with minimum system architecture," IEEE Sensors Letters, vol. 2, no. 1, p. 3500604, Mar. 2018.
5 C. Gu, J. Lien, "A two-tone radar sensor for concurrent detection of absolute distance and relative movement for gesture sensing," IEEE Sensors Letters, vol. 1, no. 3, p. 3500504, Jun. 2017.
6 장병준, 박재형, 육종관, 문준호, 이경중, "하나의 원형편파 안테나와 PLL을 이용하여 소형이면서도 개선된 잡음 성능을갖는2.4 GHz 바이오레이다시스템," 한국전자파학회논문지, 20(12), pp. 1325-1332, 2009년 12월.   DOI
7 F. Michler, B. Scheiner, F. Lurz, R. Weigel, and A. Koelpin, "(Micro)Metering with mirowaves: A low-cost, low-power, high-precision radar system," IEEE Microwave Magazine, vol. 20, no. 1, pp. 91-97, Jan. 2019.   DOI