Spectral Kurtosis Based RFI Mitigation for CHIME
Abstract
We present the implementation of a spectral kurtosis based Radio Frequency Interference detection system on the CHIME instrument and its reduced-scale pathfinder. Our implementation extends single-receiver formulations to the case of a compact array, combining samples from multiple receivers to improve the confidence with which RFI is detected. Through comparison between on-sky data and simulations, we show that the statistical properties of the canonical spectral kurtosis estimator are functionally unchanged by cross-array integration. Moreover, by comparison of simultaneous data from CHIME and the Pathfinder, we evaluate our implementation's capacity for interference discrimination for compact arrays of various size. We conclude that a spectral kurtosis based implementation provides a scalable, high cadence RFI discriminator for compact multi-receiver arrays.
Cite
@article{arxiv.1808.10365,
title = {Spectral Kurtosis Based RFI Mitigation for CHIME},
author = {Jacob Taylor and Nolan Denman and Kevin Bandura and Philippe Berger and Kiyoshi Masui and Andre Renard and Ian Tretyakov and Keith Vanderlinde},
journal= {arXiv preprint arXiv:1808.10365},
year = {2019}
}
Comments
Submitted to JAI special issue on RFI mitigation