Low-Power Sliding Correlation CMOS UWB Pulsed Radar Receiver for Motion Detection\ud

摘要

This paper presents a low-power coherent receiver for UWB pulsed Radar for motion detection. Due to accuracy of the radar motion detection, coherent detection scheme is adopted in the receiver. To relax the stringent requirement of timing synchronization, sliding correlation detection is\udproposed. The clocking step which determines detection\udresolution is determined by 2ns which is half of a pulse width or equivalent to 30cm. Receiver is designed in 0.13-μm CMOS process from 1.5 V supply. The pulse center frequency is 4GHz. The receiver includes a high voltage gain L3A, a analog correlator, a sampling comparator and a Flip Flop. The wholereceiver excluding an L3A consumes 0.9 mA of DC current and 10pJ/pulse.