Issue link: https://resources.mouser.com/i/1484091
27 Qorvo 2022 (TRx), otherwise known as a UWB anchor, in the vehicle provides a bubble of coverage that can enable secure access once a BLE handshake is performed (Figure 7). Once the BLE system performs network discovery and UWB wakeup, the UWB ranging and secure authentication triggers the CAN-bus system in the car to initiate the autonomous remote keyless entry mechanism. The multiple UWB anchors in the vehicle allow for precise location detection of the phone or keyfob and add security features. As a backup system, a keyfob or phone equipped with the eSE and NFC can be used to access such a vehicle while close to the vehicle's NFC tag. UWB & V2V Adding additional UWB sensors and combining UWB ranging with a vehicle-to-vehicle (V2V) communication link makes it possible to create a UWB area network by communicating UWB information over V2V. This could allow for secure information to be shared between or among vehicles on the road and assist fully autonomous or semi-autonomous driving or navigation systems to safely coordinate and avoid obstacles or otherwise provide alerts to a manually operated vehicle (Figure 8). Figure 7: Example PEPS Automotive Hardware Implementation. (Source: Qorvo) Software (Key Fob) • UWB software stack resides on BLE SoC & NFC/ eSE Controller: 2 SPI Bus • Communication between NFC/ BLE/UWB via SPI bus • General embedded software development environment UWB Hardware/Software Typical PEPS Automotive Implementation Figure 8: Sensor fusion capability using UWB and V2V communications. (Source: Qorvo) Four vehicles in a group Software (Auto) • UWB sofware stacks reside on BCM main MCU & Master Slave NCU anchors • Communication between BCM/NFC/UWB nodes via CAN bus