Randomized Linear Receive Arrays for Through-the-Wall Moving Target Indication

Author(s):

Kenneth Ranney, Anthony Martone, and Roberto Innocenti

Abstract:

Azimuthal sidelobe reduction remains a significant challenge in many current radar applications, including detection of slowly moving targets inside buildings. We consider a linear receive array and introduce a sidelobe-reduction technique that operates in the time domain to reduce artifacts in output imagery produced by a near-field beam-sharpener. We then demonstrate the effectiveness of this technique using data collected by an impulse-based, low-frequency, ultra-wideband radar used for through-the-wall, moving-target indication (MTI) at near-range. We implement a change detection paradigm for MTI, since this approach is most appropriate for the radar system under consideration. Finally, we introduce metrics to quantify the improvements in MTI image quality realized through the introduction of randomized linear arrays.