Low-power Low-complexity Design of Frequency Modulated Continuous Wave Radar Transceivers

Fuyuan Zhao, Bo Zhou, Yao Li

Research output: Chapter in Book/Report/Conference proceedingConference contributionpeer-review

Abstract

A 3.75-4.25GHz frequency modulated continuous wave (FMCW) radar transceiver, employing intermediate-frequency (IF) delay rather than RF beat frequency to represent distance, is implemented in 65nm CMOS for applications in ultra-wideband (UWB) band. To overcome the trade-off between wide bandwidth and high ranging resolution in the conventional FMCW radars, a dual-BPF regenerative FM demodulator and a time-To-digital converter (TDC) are utilized to achieve low power, low complexity, and fine ranging resolution. In the transmitter, a slew rate controlled relaxation oscillator and a 3-stage RF voltage-controlled oscillator (VCO) are hired to perform frequency modulation with significant power savings. In addition, a successive approximation register (SAR) logic based automatic frequency calibration (AFC) loop is placed in the transmitter to calibrate the frequencies of the oscillators for process, voltage and temperature (PVT) robustness consideration. The proposed transceiver with 3.3mW power consumption and-110dBm sensitivity, features sub-cm ranging capability, better than the conventional designs with tens of centimeters resolution.

Original languageEnglish
Title of host publication10th International Conference on Communications, Circuits and Systems, ICCCAS 2018
PublisherInstitute of Electrical and Electronics Engineers Inc.
Pages185-189
Number of pages5
ISBN (Electronic)9781538693872
DOIs
Publication statusPublished - Dec 2018
Event10th International Conference on Communications, Circuits and Systems, ICCCAS 2018 - Chengdu, China
Duration: 22 Dec 201824 Dec 2018

Publication series

Name10th International Conference on Communications, Circuits and Systems, ICCCAS 2018

Conference

Conference10th International Conference on Communications, Circuits and Systems, ICCCAS 2018
Country/TerritoryChina
CityChengdu
Period22/12/1824/12/18

Keywords

  • FMCW
  • IF delay
  • TDC
  • ranging
  • regenerative architecture

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