Ultrawideband Through-the-wall Radar Adaptive Imaging Approach Using Cross-correlation Weighting of Dual Robust Beamforming

An effective adaptive imaging method using cross-correlation weight of dual robust beamforming is proposed for UltraWideBand (UWB) through-the-wall imaging radar. Dual constrained Robust Capon Beamformings (DRCB) is applied to these 2 subarrays which get by dividing array alternately. The energy of the sum of these 2 beamformings output signals is regarded as pixel value in order to achieve higher resolution and much better interference suppression capabilities. Because these 2 beamformings have a well-correlated mainlobe response and a different or uncorrelated sidelobe response, the Cross-correlated Coefficient (CC) of two beamformings output signals is weighted for each pixel to suppress sidelobe so as to improve significantly constrast. The excellent performance of the proposed method is demonstrated by FDTD numerical simulations and the experimentally measured data results.