Digital Direction Finding (DF) System for the Next Generation Submarine Electronic Warfare (EW)

Improved Direction Finding capabilities for insertion into the Submarine Imaging Mast are developed and integrated with the Next Generation Submarine Electronic Warfare (EW) System.In Phase I candidate DF approaches are analytically modeled (MATLAB). The AOA performance, RF complexity, and SWAP (with current mast antennas and size, power, and interface restrictions) are compared. Functional block diagrams and AOA error budgets are developed. Calibration approaches are developed exploiting the Next-Gen EW System digital architecture. The DF module concept feasibility in meeting Navy requirements is shown. In Phase II the prototype is developed and evaluated for suitability for Next Generation EW Digital DF. The prototype performance is demonstrated and evaluated using synthetic and real-world signals. Performance is assessed over frequency, AOA, pulse-width and SNR. The impact of numerous deployment cycles is addressed. Evaluation results are used to refine the prototype and establish a design to meet the Navy requirements. A Phase III development plan is prepared to transition the technology for Navy use. In Phase III, RAS will support the Navy in transitioning the technology, including formal test and validation. Testing is conducted in an operationally relevant environment at NUWC (or sea trials) and effectiveness assessed.