Chapter 12: Synthetic Aperture Imaging

Learning Objectives

• Derive SAR range and cross-range resolution from bandwidth and synthetic aperture length
• Implement the range-Doppler algorithm for SAR image formation
• Formulate SAR as a special case of the linear imaging model $\mathbf{y} = \mathbf{A}\mathbf{c} + \mathbf{w}$
• Apply autofocus techniques including PGA and minimum-entropy to compensate motion errors
• Distinguish ISAR from SAR and perform range-Doppler imaging of rotating targets
• Understand tomographic SAR for 3D reconstruction via multi-baseline sensing
• Apply compressed sensing to SAR for sub-Nyquist imaging and super-resolution