Interference Suppression Using Knowledge Aided Subarray Pattern Synthesis
Technical Report,01 Sep 2014,24 Mar 2016
AIR FORCE INSTITUTE OF TECHNOLOGY WRIGHT-PATTERSON AFB OH WRIGHT-PATTERSON AFB United States
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Phased array systems typically subarray many antenna elements into far fewer digitized channels, to the point where just one subarray may theoretically have many more spatial degrees of freedom DOF than digital DOF afforded from the number of digitized channels, C. More DOF yields better performance, but adding more channels drives system cost and data throughput requirements. DOF within the subarrays could be designed to mitigate selected interference signals at the subarray pattern stage if the antenna manifold and the angle of arrival AOA of interference sources are known. A jammers AOA can be derived from additional knowledge sources andor algorithmic processing of the channel data. Simulations are used to illustrate important implementation trades and a notional concept of operation for dividing spatial nulling duties between real and digital beamformers.
- Electrical and Electronic Equipment
- Statistics and Probability