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Adaptive Formation of Sum and Difference Beams to Maintain
Monopulse Slope

Ronald L. Fante

The MITRE Corporation
202 Burlington Road
Bedford, MA 01730-1420
tel: (781) 271-5503
email: Rfante@mitre.org

Abstract One difficulty with space-time adaptive processors that independently form sum (S) and delta (D) beams, is that the monopulse slope D/S may be highly
distorted. In this paper we have developed a procedure in which the sum beam is first formed adaptively, and the adapted difference beam is formed subject to the constraint that a specified monopulse slope is maintained. The results are illustrated for a bistatic space-based radar, with receive array consisting of 13 adaptive subarrays and processing 14 pulses (182 degrees of freedom), that is, detecting and locating slowly-moving ground targets immersed in heavy clutter. We demonstrate that the clutter is cancelled in both and sum and difference beams, and the monopulse slope maintained over a wide range of target speeds (a separate matched filter is formed for each target speed).

Presentation (pdf format)



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