IEEE CAMA conference presentation

The 2021 version of the IEEE Antennas and Propagation Society's CAMA conference will be held (virtually) in Antibes, France. At some point, our recorded presentation (slides, video link) will come across the conference zoom channel. You can also read our paper.

In this conference, we describe the "partial Fourier transform trick" we use to break down a multi-snapshot inversion of an observation model given by the van Cittert-Zernike theorem into a set of distinct inversions, one for each orbital frequency (that is, each frequency associated with the Fourier transform along the snapshot number or subsatellite position axis).

Unfortunately, we did not have space to include detailed derivations, and the "DFT sampling" scenario we use to demonstrate the concept (while common in the literature) carries, in a multisnapshot setting, geometric assumptions that are not the most realistic (read: make us sound like flat-earthers). Nevertheless, the paper confirms that this "partial Fourier transform trick" can be used to denoise and unfold a sequence of snapshots that are so badly undersampled along-track that aliasing invades the entire field of view. Thus, we may choose to sacrifice along-track baseline sampling to improve across-track resolution, opening many new avenues for antenna array design.

If you have any questions or comments, please reach out!