Multisensor Time Synchronization Using Ultra-Wideband Technology

We propose to develop an innovative way to synchronize multiple sensor packages using ultra wideband (UWB) transceivers (radios). Our approach can be applied to synchronize sensor packages in one single airborne platform or distributed sensors in multiple airborne platforms. UWB spreads its energy over several Giga Hertz so it is highly LPI/LPD. This method does not rely on GPS so the synchronization will be maintained when the GPS signal is not available. A time resolution of 1 nanosecond is achievable using existing UWB chipsets. The same link that is used for time synchronization can also carry data for two-way communication. The most critical functions are already implemented in Silicon-Germanium (SiGe) chips, so the hardware to implement this time synchronization scheme can be very low-cost and very simple. The proposed time synchronization scheme can be implemented in a wired or a wireless network. For a wired network, the master will send out the synchronization signal to an RF splitter that branches out to each sensor package's UWB transceiver using RF cables.