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http://dx.doi.org/10.5515/KJKIEES.2008.19.9.1010

Noise Analysis and Measurement for a CW Bio-Radar System for Non-Contact Measurement of Heart and Respiration Rate  

Jang, Byung-Jun (Department of Electrical Engineering, Kookmin University)
Yook, Jong-Gwan (Department of Electrical and Electronic Engineering, Yonsei University)
Na, Won (Department of Electronic, Electrical and Computer Engineering, University of Seoul)
Lee, Moon-Que (Department of Electronic, Electrical and Computer Engineering, University of Seoul)
Publication Information
The Journal of Korean Institute of Electromagnetic Engineering and Science / v.19, no.9, 2008 , pp. 1010-1019 More about this Journal
Abstract
In this paper, we present a noise analysis and measurement results of a bio-radar system that can detect human heartbeat and respiration signals. The noise analysis including various phase noise effects is very important in designing the bio-radar system, since the frequency difference between the received signal and local oscillator is very small and the received power is very low. All of the noise components in a bio-radar system are considered from the point of view of SNR. From this analysis, it can be concluded that the phase noise due to antenna leakage is a dominant factor and is a function of range correlation. Therefore, the phase noise component with range correlation effect, which is the most important noise contribution, is measured using the measurement setup and compared with the calculated results. From the measurement results, our measurement setup can measure a closed-in phase noise of a free-running oscillator. Based on these results, it is possible to design a 2.4 GHz bio-radar system quantitatively which has a detection range of 50 cm and low power of 1 mW without additional PLL circuits.
Keywords
Biomedical Monitoring; Bio-Radar; Doppler Radar; SNR; Phase Noise; Range Correlation; Heart Rate;
Citations & Related Records
Times Cited By KSCI : 1  (Citation Analysis)
연도 인용수 순위
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