@inproceedings{2738fefb221a44fda6fb67fc1a1ab883,
title = "A Fully-integrated Doppler-assisted FMCW Radar with Low Hertz Range Noise Figure for Indoor Localization and Vital Sign Sensing",
abstract = "This paper presents a Doppler-assisted frequency modulated continuous wave (FMCW) radar that leverages the benefits of FMCW's range resolution and Doppler's sensitivity for indoor applications. The Doppler mode reuses circuit blocks in the FMCW mode to reduce power consumption and area overhead. Low-frequency noise contributions from the receiver circuits are analyzed and an 'RF+LO+BB' combined noise figure (NF) optimization scheme is proposed to minimize the low-frequency noise. The radar employs a nested phase-locked loop frequency synthesizer with low phase noise and incorporates an optimized ΔTstep selection technique to improve chirp linearity. Designed in a 55-nm CMOS technology, the radar achieves NFs of 32 dB and 12 dB at 10 Hz and 1 kHz, respectively, and a chirp linearity of 0.0039\% over a 3.52 GHz chirp bandwidth (BW), leading to a range resolution of 4.7 cm. The radar occupies an area of 12.7 mm2, and consumes 220 mA of current in the FMCW mode and 160 mA in the Doppler mode under a power supply of 3.3 V.",
keywords = "CMOS, DC offset, Doppler, FMCW, flicker noise, indoor localization, radar, vital sign sensing",
author = "Yuqin Zhang and Zitong Zhang and Zhiluo Zhang and Zhenyu Zhang and Yue Zhu and Ruilai Xu and Ying Liu and Shixiang Ding and Jikun Wang and Kaige Wang and Dalin Li and Peng Wang and Guangsheng Chen and Hao Deng and Leilei Huang and Chunqi Shi and Jinghong Chen and Runxi Zhang",
note = "Publisher Copyright: {\textcopyright} 2025 IEEE.; 2025 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2025 ; Conference date: 15-06-2025 Through 17-06-2025",
year = "2025",
doi = "10.1109/RFIC61188.2025.11082922",
language = "英语",
series = "Digest of Papers - IEEE Radio Frequency Integrated Circuits Symposium",
publisher = "Institute of Electrical and Electronics Engineers Inc.",
pages = "411--414",
editor = "Jane Gu and Kenichi Okada",
booktitle = "2025 IEEE Radio Frequency Integrated Circuits Symposium, RFIC 2025",
address = "美国",
}