Miniature Precision Anti-Jam (MPAS) for Space Constrained Precison Approach and Landing Platforms

Small Navy UAS platforms require affordable GPS anti-jam technology that works with small antenna arrays to meet the operational availability and accuracy requirements in challenged GPS environments. Beam-forming/null steering algorithms have been developed for antenna installations on ships and fixed wing aircraft where navigational accuracy is achieved at the expense of greater complexity and cost in the antenna electronics. Most of the current anti-jam systems use nulling techniques that steer antenna nulls toward the interfering signals by adapting antenna weights. Studies suggest that these techniques introduce error into the GPS solution that may be unacceptable for precision approach and landing. The objective of this Phase II SBIR program is to develop advanced non beam-steering adaptive weighting algorithms that mitigate potential code and carrier phase bias errors introduced by Controlled Reception Pattern Antenna (CRPA) nulling algorithms. In Phase I Mayflower modeled algorithms and performed simulations to mitigate code and carrier phase bias errors introduced in the nulling process. In Phase II, our plan is to further develop these algorithms and implement an enhanced AJ solution to demonstrate the ability to mitigate GPS carrier phase and pseudo-range biases. Under Phase III, Mayflower will develop form-fit AJ electronics for transitioning the technology to current and future naval platforms focused on small unmanned aerial systems (UAS).