Spectral Kurtosis-Based RFI Mitigation for CHIME

Journal of Astronomical Instrumentation

article

Jacob Taylor¹  Nolan Denman¹  Kevin Bandura³  Philippe Berger⁵  Kiyoshi Masui⁷  Andre Renard¹  Ian Tretyakov¹  Keith Vanderlinde¹ 

[1] Dunlap Institute for Astronomy and Astrophysics, University of Toronto;Department of Astronomy and Astrophysics, University of Toronto;Department of Computer Science and Electrical Engineering, West Virginia University;Center for Gravitational Waves and Cosmology, West Virginia University;Department of Physics, University of Toronto;Canadian Institute for Theoretical Astrophysics, University of Toronto;Department of Physics and Kavli Institute for Astrophysics and Space Research, Massachusetts Institute of Technology

关键词: Radio;    RFI;    spectral kurtosis;    CHIME;   

DOI  :  10.1142/S225117171940004X

学科分类：天文学(综合)

来源: World Scientific Publishing Co. Pte. Ltd.

【 摘 要 】

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 sizes. We conclude that a spectral kurtosis-based implementation provides a scalable, high cadence RFI discriminator for compact multi-receiver arrays.

【 授权许可】

Unknown