The proposed radar transceiver architecture achieves low power consumption and fine ranging resolution for noncontact vital sign detection.
Enables low-power noncontact vital sign monitoring; leaves open clinical validation in cardiovascular settings.
This paper presents a low power interference-robust radar transceiver architecture for noncontact vital sign detection and mobile healthcare applications. A duty-cycled transceiver design is proposed to significantly reduce power consumption of front-end circuits. Occupying 3-to-5 GHz band with four 500 MHz sub-channels, the radar mitigates the narrowband interference (NBI) problem with the frequency hopping scheme. In the time domain, the ΔΣ TDC is employed to achieve fine ranging resolution with noise shaped oversampling. The transceiver implemented in 65 nm CMOS consumes 17.2 mW from a 1.0-V supply when duty-cycled and achieves an RMS detection accuracy of 5.68 mm.
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Chen et al. (2016) studied this question.
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