Single-input-multiple-output wi-fi radar for vital signal sensing and device tracking
- Author
- Xianjun Jiao (UGent) , Thijs Havinga (UGent) , Wei Liu (UGent) and Ingrid Moerman (UGent)
- Organization
- Project
- Abstract
- Multiple Input Multiple Output (MIMO) radar systems enhance detection and anti-interference capabilities by increasing the number of antennas compared to traditional radar systems. Despite significant research into Wi-Fi sensing in recent years, constructing Wi-Fi MIMO radar remains challenging due to half-duplex RF hardware and limited access to low-level multi-antenna signals in commercial Wi-Fi chips. This paper presents a SIMO Wi-Fi radar with one Tx and two Rx antennas, based on the open-source Wi-Fi SDR platform, openwifi, which has implemented the full 802.11 stack. The hardware includes an FPGA and an AD9361 RF front-end. Directional antennas are used to reduce Tx-Rx interference in full-duplex mode. This Wi-Fi MIMO radar system brings dual capabilities: sensing the passive target that is not transmitting any signals and the normal Wi-Fi device that transmits signals for data traffic. In this paper, the dual capabilities are demonstrated in two cases: vital signal sensing for humans and Angle of Arrival (AoA) tracking of another device. More specifically, millimeter-level movement detection is achieved by processing phase information from the Channel State Information (CSI) of the two Rx antennas.
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Citation
Please use this url to cite or link to this publication: http://hdl.handle.net/1854/LU-01JMVPSR8AR08RRW9MC15FPF58
- MLA
- Jiao, Xianjun, et al. “Single-Input-Multiple-Output Wi-Fi Radar for Vital Signal Sensing and Device Tracking.” 2025 IEEE 5th International Symposium on Joint Communications & Sensing (JC&S), IEEE, 2025, pp. 1–3, doi:10.1109/jcs64661.2025.10880631.
- APA
- Jiao, X., Havinga, T., Liu, W., & Moerman, I. (2025). Single-input-multiple-output wi-fi radar for vital signal sensing and device tracking. 2025 IEEE 5th International Symposium on Joint Communications & Sensing (JC&S), 1–3. https://doi.org/10.1109/jcs64661.2025.10880631
- Chicago author-date
- Jiao, Xianjun, Thijs Havinga, Wei Liu, and Ingrid Moerman. 2025. “Single-Input-Multiple-Output Wi-Fi Radar for Vital Signal Sensing and Device Tracking.” In 2025 IEEE 5th International Symposium on Joint Communications & Sensing (JC&S), 1–3. IEEE. https://doi.org/10.1109/jcs64661.2025.10880631.
- Chicago author-date (all authors)
- Jiao, Xianjun, Thijs Havinga, Wei Liu, and Ingrid Moerman. 2025. “Single-Input-Multiple-Output Wi-Fi Radar for Vital Signal Sensing and Device Tracking.” In 2025 IEEE 5th International Symposium on Joint Communications & Sensing (JC&S), 1–3. IEEE. doi:10.1109/jcs64661.2025.10880631.
- Vancouver
- 1.Jiao X, Havinga T, Liu W, Moerman I. Single-input-multiple-output wi-fi radar for vital signal sensing and device tracking. In: 2025 IEEE 5th International Symposium on Joint Communications & Sensing (JC&S). IEEE; 2025. p. 1–3.
- IEEE
- [1]X. Jiao, T. Havinga, W. Liu, and I. Moerman, “Single-input-multiple-output wi-fi radar for vital signal sensing and device tracking,” in 2025 IEEE 5th International Symposium on Joint Communications & Sensing (JC&S), Oulu, Finland, 2025, pp. 1–3.
@inproceedings{01JMVPSR8AR08RRW9MC15FPF58,
abstract = {{Multiple Input Multiple Output (MIMO) radar systems enhance detection and anti-interference capabilities by increasing the number of antennas compared to traditional radar systems. Despite significant research into Wi-Fi sensing in recent years, constructing Wi-Fi MIMO radar remains challenging due to half-duplex RF hardware and limited access to low-level multi-antenna signals in commercial Wi-Fi chips. This paper presents a SIMO Wi-Fi radar with one Tx and two Rx antennas, based on the open-source Wi-Fi SDR platform, openwifi, which has implemented the full 802.11 stack. The hardware includes an FPGA and an AD9361 RF front-end. Directional antennas are used to reduce Tx-Rx interference in full-duplex mode. This Wi-Fi MIMO radar system brings dual capabilities: sensing the passive target that is not transmitting any signals and the normal Wi-Fi device that transmits signals for data traffic. In this paper, the dual capabilities are demonstrated in two cases: vital signal sensing for humans and Angle of Arrival (AoA) tracking of another device. More specifically, millimeter-level movement detection is achieved by processing phase information from the Channel State Information (CSI) of the two Rx antennas.}},
author = {{Jiao, Xianjun and Havinga, Thijs and Liu, Wei and Moerman, Ingrid}},
booktitle = {{2025 IEEE 5th International Symposium on Joint Communications & Sensing (JC&S)}},
isbn = {{9798331531652}},
language = {{eng}},
location = {{Oulu, Finland}},
pages = {{1--3}},
publisher = {{IEEE}},
title = {{Single-input-multiple-output wi-fi radar for vital signal sensing and device tracking}},
url = {{http://doi.org/10.1109/jcs64661.2025.10880631}},
year = {{2025}},
}
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