Echo imaging with beam-steered data

This paper presents a system model and inversion for the beam-steered data obtained via linearly varying the relative phase among the elements of an array, also known as phased array scan data. The system model and inversion incorporate the radiation pattern of the array's elements. The inversion method utilizes the time samples of the echoed signals for each scan angle instead of range focusing. It is shown that the temporal Fourier transform of the phased array scan data provides the distribution of the spatial Fourier transform of the reflectivity function for the medium to be imaged. It is shown that the imaging information obtained via the inversion of phased arra scan data is equivalent to the image reconstructed from its synthesized array counterpart.