Large-Aperture Sparse Array Detector System for Multiple Emitter Location.
Patent, Filed 25 Nov 88, patented 1 Sep 92,
DEPARTMENT OF THE NAVY WASHINGTON DC
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A detector beamformer array system having a sparse array and a reference array. The reference array is adapted, according to known principles, to have an output response with one main lobe significantly larger than all other side lobes, and with a substantially flat response. Signals received by both arrays are cross-correlated with one another, and only signals sufficiently correlated arc annunciated. The resulting adaptive array system has a resolution even better than that of the sparse arrays aperture, and with directional sector selectivity corresponding to the angular width of the reference arrays mainlobe, providing a system having high resolution and directional selectivity, but with far fewer sensors than with filled arrays used for this purpose.
- Target Direction, Range and Position Finding