A 76-81 GHz FMCW MIMO Coded Transceiver for Automotive Radar

76–81 GHz FMCW automotive radar transceiver is presented, implemented in 22 nm CMOS-FDX. Its key features are four TX channels with 7-bit phase rotator delivering controllable output power up to +15 dBm, eight RX channels that support MIMO phase modulation and exhibit 9.5 dB noise figure, a dual-loop fractional-N PLL FMCW synthesizer with -96.4 dBc/Hz phase noise and built-in self-test for functional safety. The 4 × 4 mm² chip consumes 1.8 W in Time-Division Multiplexing (TDM) mode.