Suppression of Cosite RFI in Airborne Communication Systems

" This proposal is responsive to the needs of Navy Airborne Command and Control (C2) systems using multiple receive and transmit antennas in a limited space for simultaneous operations (SIMOP), and thereby generating cosite radio frequency interference(RFI). Mayflower proposes to analyze and develop two techniques to suppress cosite RFI. The first technique will be external to the radio, and will be based on RF Adaptive Interference Canceller (RF AIC) technology, which Mayflower is currently developingto protect GPS receivers from high-power (10 Watt) L-band telemetry transmitters. The second technique will be integrated in JTRS, and will be based on Digital AIC (DIG AIC) technology, which Mayflower has developed and patented to protect GPS receiversfrom narrowband jammers.The main objectives of the Phase I feasibility study are to perform: (a) requirements analysis regarding RFI characteristics, sensitivity of the Link 16, and JTRS integration, (b) performance analysis of Digital Canceller of the cosite RFI, includingmodeling of cosite RFI waveforms and canceller adaptation, and (c) to develop preliminary design of RF canceller of cosite RFI by modifying the Mayflower GPS RF Canceller. These two cosite RFI mitigation techniques will be further developed, implementedand demonstrated in Phase II in an operational environment. The proposed RF Canceller technology can benefit any military or commercial communications installation facin