Title :
A UWB IR timed-array radar using time-shifted direct-sampling architecture
Author :
Lai, Chang-Ming ; Tan, Kai-Wen ; Yu, Liu-Yuan ; Chen, Yen-Ju ; Huang, Jun-Wei ; Lai, Shr-Chau ; Chung, Feng-Hsu ; Yen, Chia-Fung ; Wu, Jen-Ming ; Huang, Po-Chiun ; Chang, Keh-Jeng ; Huang, Shi-Yu ; Chu, Ta-Shun
Author_Institution :
Dept. of Electr. Eng., Nat. Tsing Hua Univ., Hsinchu, Taiwan
Abstract :
A UWB impulse radio (IR) timed-array radar using time-shifted direct-sampling architecture is presented. The transmitter array can generate and send a variety of 10GS/s pulses towards targets. The receiver array samples the reflected signal in RF domain directly by time interleaved sampling with equivalent sampling rate of 20 GS/s. The radar system can determine time of arrival (TOA) and direction of arrival (DOA) through time-shifted sampling edges which are generated by on-chip digital-to-time converters (DTC). The proposed architecture has range and azimuth resolution of 0.75 cm and 3 degree respectively. This prototype is implemented in a 0.18μm CMOS technology.
Keywords :
CMOS integrated circuits; array signal processing; digital-analogue conversion; direction-of-arrival estimation; radar signal processing; signal sampling; time-of-arrival estimation; ultra wideband radar; CMOS technology; DOA; DTC; RF domain; TOA estimation; UWB IR timed-array radar system; UWB impulse radio radar; direction of arrival estimation; on-chip digital-to-time converters; receiver array; reflected signal; size 0.18 mum; time interleaved sampling; time of arrival estimation; time-shifted direct-sampling architecture; transmitter array; Antenna measurements; Arrays; Radio frequency; Receivers; Transmitters; Ultra wideband radar;
Conference_Titel :
VLSI Circuits (VLSIC), 2012 Symposium on
Conference_Location :
Honolulu, HI
Print_ISBN :
978-1-4673-0848-9
Electronic_ISBN :
978-1-4673-0845-8
DOI :
10.1109/VLSIC.2012.6243786
