Geometric Pairing (GP) of battlefield entities thru the Combat Net Radio System (CNRS)

Data Fusion Corporation (DFC) and ITT Industries propose the development of a prototype Combat Identification (CID) system that will reduce fratricide, increase situational awareness (SA), and enhance combat effectiveness for Soldier-to-Soldier based CID applications. The sys¬tem design will use GPS, a modified-mobile adhoc network MANET, local ranging signals, mesh network and geometric pairing (GP) that will provide sub-meter position information, velocity, time (PVT) as well as ID. The sub-meter position is obtained using DFC’s innovative positioning algorithms that uniquely combine (in a weighted least squares sense) lower accuracy absolute positions with highly accurate relative positions. Furthermore, DFC takes advantage of the mesh rigidity where appropriate. The minimal configuration can be a mixed network of dynamic nodes with or without GPS. GPS receivers only need be single carrier (L1) receivers processing the lower accuracy CA signal. This can be accomplished without any infrastructure. Should L1L2 P(Y) code receivers, and infrastructure be available additional accuracy and robustness can be gained. DFC will leverage its legacy GPS signal generator software and GPS software receiver (Kober, W., 2004), implemented on a Field Programable Gate Array (FPGA), to develop this CID system.