Underwater Sampling Inlet/Preconcentrator System for In Situ Chemical Measurements of UXO Contaminants in Seawater from AUVs

Integrated Sensors Inc. and Syracuse Research Corporation propose to develop and demonstrate techniques that effect practical, operationally meaningful, simultaneous mainlobe/sidelobe jamming cancellation in solid state, active array radars whilepreserving target angular accuracies and permit operation in littoral (clutter) environments. The primary emphasis is: (1) to address phased array radars that do not have access to their subarrays, i.e., only traditional sum, difference, and auxiliarychannel availability is assumed, (2) to design an architecture that will effectively suppress simultaneous sidelobe and mainlobe jamming, and (3) to investigate techniques for making the adaptive algorithms compatible with high level, high duty cycleclutter returns in the main beam, as may be expected in the littoral operating environment. Two innovative and promising architectures will be examined: (a) a sequential constrained multiple sidelobe canceler (MSLC)/mainlobe canceler architecture combinedwith a variant of the Maximum Likelihood Beamspace Processor (MLBP), and (b) a modified MSLC-MLBP adaptation, employing a constrained MSLC and a reduced channel adaptation of the MLBP. Our demonstration plan includes an experimental system including aphased array radar as part of a comprehensive Phase I and Phase II program, eventually leading to implementation of jamming suppression processors for retrofit into existing Navy radars.The technology developed can become an integral part of many futureradar system designs for both military and commercial applications. A variety of applications for shipboard, airborne, spaceborne and ground based passive receive systems can significantly benefit as well. Commercial applications for communicationssystems will also benefit from this technology development.