Detection with Adaptive Arrays with Irregular Digital Subarrays

Abstract

In this paper we combine advanced ABF algorithms like LSMI, LMI, CAPS, and concepts for adaptive guard channels with subarrayed planar arrays together with the theoretical results available in the field of adaptive detection (GLRT, ACE, AMF tests). The aim is to define a robust adaptive sidelobe blanking (ASB) detector against combined impulse and CW interference. For the selection of the thresholds we define the detection margin as a direction dependent tool instead of the commonly used main and guard channel antenna patterns. This criterion gives insight into the critical scenarios for detection. One result we obtain is that an ASB based on the GLRT together with a low sidelobe preserving ABF algorithm like CAPS has superior performance.