Professor Amir Leshem’s research on signal processing and imaging for large radio-telescope arrays focuses on developing advanced algorithms to enhance the resolution, sensitivity, and accuracy of astronomical observations. His work addresses the challenges of processing massive, noisy, and incomplete data collected by distributed antenna arrays, using tools from array signal processing, calibration theory, and sparse imaging. By enabling high-precision reconstruction of cosmic signals, his research supports breakthroughs in radio astronomy, including the study of black holes, cosmic background radiation, and deep-space phenomena.