A DC-coupled biomedical radar sensor with analog DC offset calibration circuit

Dongyang Tang; Jing Wang; Zhengyu Peng; Yi Chyun Chiang; Changzhi Li

doi:10.1109/I2MTC.2018.8409872

A DC-coupled biomedical radar sensor with analog DC offset calibration circuit

Dongyang Tang
, Jing Wang
, Zhengyu Peng
, Yi Chyun Chiang
, Changzhi Li

Department of Electronic Engineering

Texas Tech University

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

13 Scopus citations

Abstract

A common problem of biomedical radar sensors is the DC offset at the output of radar receiver front-end. In this paper, a DC-coupled Doppler radar sensor system with an analog DC offset calibration circuit is proposed. The calibration circuit can track the change of DC offset continuously, and automatically remove the offset on the fly or in a controlled manner. The proposed calibration circuit uses pure analog components and does not require any digital signal processing (DSP) or software configuration. Compared to existing digitized solutions, the proposed analog calibration technique has the advantage of low cost, low complexity, extremely small delay, and very high resolution. Experiment demonstrates that input signals with a wide range of input DC offset can be processed. Hence the dynamic range of the baseband variable gain amplifier (VGA) can be maximized. Furthermore, the proposed DC offset calibration architecture can be easily adopted by other systems which also face DC offset problem.

Original language	English
Title of host publication	I2MTC 2018 - 2018 IEEE International Instrumentation and Measurement Technology Conference
Subtitle of host publication	Discovering New Horizons in Instrumentation and Measurement, Proceedings
Publisher	Institute of Electrical and Electronics Engineers Inc.
Pages	1-6
Number of pages	6
ISBN (Electronic)	9781538622223
DOIs	https://doi.org/10.1109/I2MTC.2018.8409872
State	Published - 10 07 2018
Event	2018 IEEE International Instrumentation and Measurement Technology Conference, I2MTC 2018 - Houston, United States Duration: 14 05 2018 → 17 05 2018

Publication series

Name	I2MTC 2018 - 2018 IEEE International Instrumentation and Measurement Technology Conference: Discovering New Horizons in Instrumentation and Measurement, Proceedings

Conference

Conference	2018 IEEE International Instrumentation and Measurement Technology Conference, I2MTC 2018
Country/Territory	United States
City	Houston
Period	14/05/18 → 17/05/18

Bibliographical note

Publisher Copyright:
© 2018 IEEE.

Keywords

DC offset
Doppler radar
biomedical radar sensor
calibration
dynamic range
front-end
mixer
motion sensor
receiver
variable gain amplifier (VGA)
vital signs

Access to Document

10.1109/I2MTC.2018.8409872

Cite this

Tang, D., Wang, J., Peng, Z., Chiang, Y. C., & Li, C. (2018). A DC-coupled biomedical radar sensor with analog DC offset calibration circuit. In I2MTC 2018 - 2018 IEEE International Instrumentation and Measurement Technology Conference: Discovering New Horizons in Instrumentation and Measurement, Proceedings (pp. 1-6). (I2MTC 2018 - 2018 IEEE International Instrumentation and Measurement Technology Conference: Discovering New Horizons in Instrumentation and Measurement, Proceedings). Institute of Electrical and Electronics Engineers Inc.. https://doi.org/10.1109/I2MTC.2018.8409872

Tang, Dongyang ; Wang, Jing ; Peng, Zhengyu et al. / A DC-coupled biomedical radar sensor with analog DC offset calibration circuit. I2MTC 2018 - 2018 IEEE International Instrumentation and Measurement Technology Conference: Discovering New Horizons in Instrumentation and Measurement, Proceedings. Institute of Electrical and Electronics Engineers Inc., 2018. pp. 1-6 (I2MTC 2018 - 2018 IEEE International Instrumentation and Measurement Technology Conference: Discovering New Horizons in Instrumentation and Measurement, Proceedings).

@inproceedings{b0f3eead9aeb4769b480b002d81693d5,

title = "A DC-coupled biomedical radar sensor with analog DC offset calibration circuit",

abstract = "A common problem of biomedical radar sensors is the DC offset at the output of radar receiver front-end. In this paper, a DC-coupled Doppler radar sensor system with an analog DC offset calibration circuit is proposed. The calibration circuit can track the change of DC offset continuously, and automatically remove the offset on the fly or in a controlled manner. The proposed calibration circuit uses pure analog components and does not require any digital signal processing (DSP) or software configuration. Compared to existing digitized solutions, the proposed analog calibration technique has the advantage of low cost, low complexity, extremely small delay, and very high resolution. Experiment demonstrates that input signals with a wide range of input DC offset can be processed. Hence the dynamic range of the baseband variable gain amplifier (VGA) can be maximized. Furthermore, the proposed DC offset calibration architecture can be easily adopted by other systems which also face DC offset problem.",

keywords = "DC offset, Doppler radar, biomedical radar sensor, calibration, dynamic range, front-end, mixer, motion sensor, receiver, variable gain amplifier (VGA), vital signs",

author = "Dongyang Tang and Jing Wang and Zhengyu Peng and Chiang, \{Yi Chyun\} and Changzhi Li",

note = "Publisher Copyright: {\textcopyright} 2018 IEEE.; 2018 IEEE International Instrumentation and Measurement Technology Conference, I2MTC 2018 ; Conference date: 14-05-2018 Through 17-05-2018",

year = "2018",

month = jul,

day = "10",

doi = "10.1109/I2MTC.2018.8409872",

language = "英语",

series = "I2MTC 2018 - 2018 IEEE International Instrumentation and Measurement Technology Conference: Discovering New Horizons in Instrumentation and Measurement, Proceedings",

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Tang, D, Wang, J, Peng, Z, Chiang, YC & Li, C 2018, A DC-coupled biomedical radar sensor with analog DC offset calibration circuit. in I2MTC 2018 - 2018 IEEE International Instrumentation and Measurement Technology Conference: Discovering New Horizons in Instrumentation and Measurement, Proceedings. I2MTC 2018 - 2018 IEEE International Instrumentation and Measurement Technology Conference: Discovering New Horizons in Instrumentation and Measurement, Proceedings, Institute of Electrical and Electronics Engineers Inc., pp. 1-6, 2018 IEEE International Instrumentation and Measurement Technology Conference, I2MTC 2018, Houston, United States, 14/05/18. https://doi.org/10.1109/I2MTC.2018.8409872

A DC-coupled biomedical radar sensor with analog DC offset calibration circuit. / Tang, Dongyang; Wang, Jing; Peng, Zhengyu et al.
I2MTC 2018 - 2018 IEEE International Instrumentation and Measurement Technology Conference: Discovering New Horizons in Instrumentation and Measurement, Proceedings. Institute of Electrical and Electronics Engineers Inc., 2018. p. 1-6 (I2MTC 2018 - 2018 IEEE International Instrumentation and Measurement Technology Conference: Discovering New Horizons in Instrumentation and Measurement, Proceedings).

Research output: Chapter in Book/Report/Conference proceeding › Conference contribution › peer-review

TY - GEN

T1 - A DC-coupled biomedical radar sensor with analog DC offset calibration circuit

AU - Tang, Dongyang

AU - Wang, Jing

AU - Peng, Zhengyu

AU - Chiang, Yi Chyun

AU - Li, Changzhi

PY - 2018/7/10

Y1 - 2018/7/10

N2 - A common problem of biomedical radar sensors is the DC offset at the output of radar receiver front-end. In this paper, a DC-coupled Doppler radar sensor system with an analog DC offset calibration circuit is proposed. The calibration circuit can track the change of DC offset continuously, and automatically remove the offset on the fly or in a controlled manner. The proposed calibration circuit uses pure analog components and does not require any digital signal processing (DSP) or software configuration. Compared to existing digitized solutions, the proposed analog calibration technique has the advantage of low cost, low complexity, extremely small delay, and very high resolution. Experiment demonstrates that input signals with a wide range of input DC offset can be processed. Hence the dynamic range of the baseband variable gain amplifier (VGA) can be maximized. Furthermore, the proposed DC offset calibration architecture can be easily adopted by other systems which also face DC offset problem.

AB - A common problem of biomedical radar sensors is the DC offset at the output of radar receiver front-end. In this paper, a DC-coupled Doppler radar sensor system with an analog DC offset calibration circuit is proposed. The calibration circuit can track the change of DC offset continuously, and automatically remove the offset on the fly or in a controlled manner. The proposed calibration circuit uses pure analog components and does not require any digital signal processing (DSP) or software configuration. Compared to existing digitized solutions, the proposed analog calibration technique has the advantage of low cost, low complexity, extremely small delay, and very high resolution. Experiment demonstrates that input signals with a wide range of input DC offset can be processed. Hence the dynamic range of the baseband variable gain amplifier (VGA) can be maximized. Furthermore, the proposed DC offset calibration architecture can be easily adopted by other systems which also face DC offset problem.

KW - DC offset

KW - Doppler radar

KW - biomedical radar sensor

KW - calibration

KW - dynamic range

KW - front-end

KW - mixer

KW - motion sensor

KW - receiver

KW - variable gain amplifier (VGA)

KW - vital signs

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BT - I2MTC 2018 - 2018 IEEE International Instrumentation and Measurement Technology Conference

PB - Institute of Electrical and Electronics Engineers Inc.

T2 - 2018 IEEE International Instrumentation and Measurement Technology Conference, I2MTC 2018

Y2 - 14 May 2018 through 17 May 2018

ER -

Tang D, Wang J, Peng Z, Chiang YC, Li C. A DC-coupled biomedical radar sensor with analog DC offset calibration circuit. In I2MTC 2018 - 2018 IEEE International Instrumentation and Measurement Technology Conference: Discovering New Horizons in Instrumentation and Measurement, Proceedings. Institute of Electrical and Electronics Engineers Inc. 2018. p. 1-6. (I2MTC 2018 - 2018 IEEE International Instrumentation and Measurement Technology Conference: Discovering New Horizons in Instrumentation and Measurement, Proceedings). doi: 10.1109/I2MTC.2018.8409872

A DC-coupled biomedical radar sensor with analog DC offset calibration circuit

Abstract

Publication series

Conference

Bibliographical note

Keywords

Access to Document

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