Multidimensional Waveform Encoding for Synthetic Aperture Radar Remote Sensing

Abstract

This paper introduces and analyses the innovative concept of multidimensional waveform encoding for spaceborne synthetic aperture radar (SAR). The combination of this technique with digital beamforming on receive enables a new class of highly performant SAR systems employing novel and highly flexible radar imaging modes. Examples are adaptive high-resolution wide-swath SAR imaging with compact antennas, enhanced parameter estimation sensitivity for applications like alongtrack interferometry and moving object indication, and the implementation of hybrid SAR imaging modes that are well suited to satisfy the hitherto incompatible user requirements for frequent monitoring and detailed mapping. Further advantages arise for fully polarimetric operation where it becomes possible to reduce the PRF by a factor of two. Implementation specific issues will be discussed and examples demonstrate the potential of the new technique for different remote sensing applications.