SKU-7 77 GHz MIMO radar system architecture

Pre-silicon architecture, DeepGrid Semi. Values are design targets. Select any block to trace its connections.

SYSTEM ARCHITECTURE · INTERACTIVESKU-7 77 GHz MIMO radar system architecture

Select a block to see what it receives and feeds; the arrows show each connection.

SKU-7 · two dies: SiGe HBT front end (IHP SG13G2) + 130 nm CMOS baseband at 200 MHz

Chirp synthesis + transmit · SiGe die

XTAL40 MHz
①Ramp genchirp profile · sawtooth / triangle
PLLfractional-N · 1 MHz loop BW
VCO38.5 GHz · SiGe HBT
PA · TX213 dBm
②PA · TX113 dBm
× 277 GHz

Signal processing · CMOS die

④ADC × 412-bit · 40 MSPS
WindowingHann / Blackman
Doppler FFT128-pt across chirps · velocity bins
Range FFT1024-pt radix-4 · 26 µs per chirp
Range-Dopplermap buffer · SRAM 512 KB

Receive array · 4 channels · SiGe die

LNA × 43.5 dB NF
③Mixer × 4LO from the × 2
IF amp × 4
AAF × 410 MHz LP

Detection + output · CMOS die

Angle estdigital beamform · 4 RX → 15° res
⑤CFARcell-averaging · constant false-alarm
⑥Target listrange · velocity · angle · RCS · up to 64 tracks per frame

OUTTo the ECU · CAN-FD · 100BASE-T1 · MIPI CSI-2

  1. ① The crystal, ramp generator, PLL and VCO synthesise the chirp.
  2. ② The doubler reaches 77 GHz and the two PAs transmit.
  3. ③ Each of four echoes is amplified, mixed with the LO, filtered.
  4. ④ The IF signals cross the die boundary and four 12-bit converters digitise them for the range FFT.
  5. ⑤ The range-Doppler map feeds CFAR detection and angle estimation.
  6. ⑥ The target list goes to the ECU over CAN-FD, 100BASE-T1 or MIPI CSI-2.