A Doppler-Assisted 76GHz PMCW Radar with Meter-Scale Unambiguous Range and µm-Scale Range Accuracy

This work presents a radar transceiver (TRX) featuring a hybrid operation scheme, where Doppler-CW and PMCW are employed in distinct frequency bands to enable cooperative sensing. By synchronizing the PRBS generator of PMCW radar and the Doppler radar carrier signal, the joint operation achieves range accuracy down to tens of µm without range ambiguity. The radar chip is fabricated in 65 nm CMOS technology, occupies 1.55 mm² of area and consumes 329.7 mW of power, demonstrating 0.18° of phase accuracy leading to 50 µm range accuracy with a meter-scale unambiguous range.