Title :
A 3.5–4GHz FMCW radar transceiver design with phase-domain oversampled ranging by utilizing a 1-bit ΔΣ TDC
Author :
Wei Zhang ; Yizhi Han ; Fei Chen ; Bo Zhou ; Xican Chen ; Woogeun Rhee ; Zhihua Wang
Author_Institution :
Inst. of Microelectron., Tsinghua Univ., Beijing, China
Abstract :
A 3.5-4GHz FMCW radar transceiver employing a phase-domain oversampled ranging method is implemented in 0.18μm CMOS for short-range wireless sensor network (WSN) applications. To overcome the tradeoff between bandwidth and ranging resolution in the conventional FMCW radar, a digital phase rotator and a 1-bit ΔΣ TDC are utilized to realize the oversampled phase-domain ranging, achieving both wide capture range and fine resolution. The proposed ranging method is verified in the prototype FMCW transceiver hardware and the feasibility of sub-cm ranging capability is also demonstrated based on on-board modulation measurement.
Keywords :
CMOS integrated circuits; CW radar; FM radar; delta-sigma modulation; microwave devices; modulation; radio transceivers; time-digital conversion; wireless sensor networks; ΔΣ TDC; 0.18μm CMOS; FMCW radar transceiver design; WSN; bandwidth resolution; conventional frequency modulated continuous wave radar; digital phase rotator; frequency 3.5 GHz to 4 GHz; on-board modulation measurement; phase-domain oversampled ranging method; ranging resolution; short-range wireless sensor network; sub-cm ranging capability; CMOS integrated circuits; Distance measurement; Frequency modulation; Radar tracking; Receivers; Voltage-controlled oscillators;
Conference_Titel :
VLSI Design, Automation and Test (VLSI-DAT), 2014 International Symposium on
Conference_Location :
Hsinchu
DOI :
10.1109/VLSI-DAT.2014.6834890
