TY - GEN
T1 - Low-power Low-complexity Design of Frequency Modulated Continuous Wave Radar Transceivers
AU - Zhao, Fuyuan
AU - Zhou, Bo
AU - Li, Yao
N1 - Publisher Copyright:
© 2018 IEEE.
PY - 2018/12
Y1 - 2018/12
N2 - 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.
AB - 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.
KW - FMCW
KW - IF delay
KW - TDC
KW - ranging
KW - regenerative architecture
UR - http://www.scopus.com/inward/record.url?scp=85070362094&partnerID=8YFLogxK
U2 - 10.1109/ICCCAS.2018.8768955
DO - 10.1109/ICCCAS.2018.8768955
M3 - Conference contribution
AN - SCOPUS:85070362094
T3 - 10th International Conference on Communications, Circuits and Systems, ICCCAS 2018
SP - 185
EP - 189
BT - 10th International Conference on Communications, Circuits and Systems, ICCCAS 2018
PB - Institute of Electrical and Electronics Engineers Inc.
T2 - 10th International Conference on Communications, Circuits and Systems, ICCCAS 2018
Y2 - 22 December 2018 through 24 December 2018
ER -