Author

Aman Chokshi

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Preprint Sep 2026

Inferring radio beams from sparse sampling patterns: a case study with the Murchison Widefield Array

Accurate primary-beam models are essential for high-dynamic-range radio experiments, particularly searches for the redshifted 21-cm signal from the Epoch of Reionisation, where beam errors can couple bright foreground emission into the faint cosmological measurement. Using reprocessed satellite observations we infer th...

Michael J. Wilensky, Aman Chokshi · 0 citations

Preprint Aug 2026

Inverting and Up-channelizing Critically-Sampled Polyphase Filter Banks

Polyphase filter banks (PFBs) are widely used to channelize digitized time-domain data in real time. However, applications such as radio astronomy often require higher spectral resolution than real-time systems can provide. We introduce a circulant inverse-PFB formalism and present a new, scalable, fast Fourier transfo...

S. Fay, M. Agrawal, H. Chiang et al. · 0 citations