Wi-Wi Is Wireless Time Sync at 1 nanosecond
3 hours ago
- Wi-Wi STAMP is a wireless time synchronization protocol from Japan's NICT, using the 900 MHz band for picosecond-level phase sync and millimeter-level distance accuracy.
- Current prototypes achieve 20 ps phase jitter and 30 ns time sync; next generation aims for 5 ns in real-world use.
- Demonstrated applications include wireless black burst time sync for video cameras and mm-level position tracking via a shell game with three units updating 20 times per second.
- Wireless range is 0.2–5 km depending on RF power, with better indoor penetration than GNSS, useful where cabling is expensive or impractical.