Space-Variant Autofocus for Forward-Looking Multichannel SAR via Nonconvex Optimization
Motion-error-induced phase errors in forward-looking multichannel synthetic aperture radar (FLMC-SAR) exhibit 2-D space-variant characteristics, which present a critical challenge for high-resolution imaging. Traditional space-variant autofocus (SVAF) methods, which rely on separable echoes, are ineffective for FLMC-SA...