Directional TDMA Networking without External Time and Position References

The current generation of Directional Mobile Ad Hoc Networking waveforms relies on accurate, universal, externally generated time and position references that must be available at all nodes. Although in principle the waveforms can use any such references, satellite navigation systems such as GPS are the practical source of these universal time and position references. This reliance on GPS is an impediment to the adoption of DMANETs for some important applications. Methods for eliminating the reliance on external references have been investigated and the performance of the selected techniques has been assessed by simulation. A preliminary DMANET waveform architecture is described that only requires information locally available at each node.