Compressive Millimeter-Wave Phased Array Imaging

In this paper, we introduce a 3-D compressive phased array imaging method. The derived system model is general and can also be used in other array configurations. With its compressive sampling capability, the proposed method can recover images with far fewer samples than traditionally required in Fourier transform-based methods. This measurement strategy greatly reduces the data acquisition time at the expense of higher computational costs. Imaging results show increased resolving power in both range and cross-range directions. Moreover, the use of beam steered data enables better reconstruction quality in the presence of noise than its counterpart in switched array scheme. Sensing configurations, like array length and number of angles, which affect the reconstruction performance, are also analyzed.