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Sensors 2016, 16(11), 1866; doi:10.3390/s16111866

Simultaneous Life Detection and Localization Using a Wideband Chaotic Signal with an Embedded Tone

1,2,* , 1,2
,
1,2
,
1,2
,
1,2
and
1,2
1
Key Laboratory of Advanced Transducers & Intelligent Control System, Ministry of Education and Shanxi Province, Taiyuan University of Technology, Taiyuan 030024, China
2
College of Physics & Optoelectronics, Taiyuan University of Technology, Taiyuan 030024, China
*
Author to whom correspondence should be addressed.
Received: 30 August 2016 / Accepted: 2 November 2016 / Published: 6 November 2016
View Full-Text   |   Download PDF [5227 KB, uploaded 8 November 2016]   |  

Abstract

A hybrid life detection radar system which transmits a wideband chaotic signal containing an embedded single-tone is proposed. The chaotic signal is used for target localization by the time-domain correlation method and synthetic aperture technique, and the single-tone signal is used to measure the frequencies of breathing and heartbeat based on an on-chip split-ring integrated sensor and Michelson interference principle. Experimental results in free space and in through-wall scenarios demonstrate that the system can realize human detection and localization simultaneously with high range resolution, high sensitivity, and large dynamic range without complex signal processing. The range resolution is about 10 cm, and the dynamic range is 35 dB for the respiration signal detection and 25 dB for the heartbeat signal detection. Due to its good immunity to interference/jamming and high spectrum efficiency, the proposed system is suitable for post-disaster rescue, elder/infant/patient vitality monitoring, and anti-terrorism enforcement applications. View Full-Text
Keywords: life detection radar; through-wall; chaotic signal; Colpitts oscillator; split ring life detection radar; through-wall; chaotic signal; Colpitts oscillator; split ring
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Liu, L.; Guo, C.; Li, J.; Xu, H.; Zhang, J.; Wang, B. Simultaneous Life Detection and Localization Using a Wideband Chaotic Signal with an Embedded Tone. Sensors 2016, 16, 1866.

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