1) For a multiuser millimeter-wave (mmWave) radar system, we propose EHC-Frank codes as radar signals to reduce interference among multiple radars. 2) For a mmWave radar system-in-package (SiP), we propose a 3-D pillar-based shield to reduce electromagnetic interference (EMI) among components within the package. We built system prototypes including W-band transmitterreceiver CMOS chips, a digital signal processor,a chip antenna-in-package to demonstrate the proposed techniques.

1) We propose EHC-Frank codes as millimeter-wave (mmWave) radar signals to reduce interference among multiple radars. This technique can support 30 radars operating simultaneously at 12-dB SNR. It is the only multiuser interference-tolerant radar system in the literature. 2) We propose the world＇s first 3-D pillar-based shield to reduce electromagnetic interference among the components within a mmWave radar system-in-package. This technique can improve the shielding effectiveness by 16.9 dB.

The proposed technology can be applied to advanced driver assistance systems (ADAS), self-driving cars, unmanned vehicles (UAV), etc. It can 1). improve driving/control safety by reducing interference among multiple millimeter-wave (mmWave) radars2). increase the reliability of a mmWave radar system-in-package by reducing electromagnetic interference (EMI) in the package. The proposed technology can benefit the automotive, transportation, logistics, defense,semiconductor industries.