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A Centimeter Resolution, 10 m Range CMOS Impulse Radio Radar for Human Motion Monitoring
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- Authors
- Piljae Park, Sungdo Kim, Sungchul Woo, Cheonsoo Kim
- Issue Date
- 2014-05
- Citation
- IEEE Journal of Solid-State Circuits, v.49, no.5, pp.1125-1134
- ISSN
- 0018-9200
- Publisher
- IEEE
- Language
- English
- Type
- Journal Article
- Abstract
- A single-chip impulse radio radar transceiver that enables high-resolution reception with enhanced signal to noise ratio (SNR) is proposed. The radar transceiver, consisting of a spectrum adjustable transmitter and a 100-ps resolution 4-channel sampling receiver, successfully demonstrates in/outdoor human walk tracing, stride-rate, and respiration measurements. The 4-channel sampling receiver, which is robust against pulse distortion, utilizes track and hold samplers and integrators while sharing a single low noise amplifier. By adopting embedded control logic, the sampling receiver achieves control flexibility as well as improved performance. A repetitive reception mode can proportionally increase the SNR of the receive pulse at the cost of a longer pulse acquisition time. DC offset and low-frequency coherent noise problems caused by on-board control clock signals are resolved with the radar architecture. The single chip radar transceiver is fabricated in a 130-nm CMOS technology occupying a chip area of 3.27 mm2. The measured results show that echo pulses are recovered with a centimeter range resolution while consuming 80 mA from a supply voltage of 1.2 V. © 1966-2012 IEEE.
- KSP Keywords
- 7 mm, CMOS Technology, Chip area, Coherent noise, Control logic, DC-offset, High resolution, Improved performance, Low frequency, Low-Noise Amplifier(LNA), Noise problems