Spectral Kurtosis Based RFI Mitigation for CHIME
arXiv:1808.10365 · doi:10.1142/S225117171940004X
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.
arXiv commentSubmitted to JAI special issue on RFI mitigation
References in corpus (6)
- Canadian Hydrogen Intensity Mapping Experiment (CHIME) Pathfinder
- Bayesian power-spectrum inference for Large Scale Structure data
- Calibrating CHIME, A New Radio Interferometer to Probe Dark Energy
- EOVSA Implementation of a Spectral Kurtosis Correlator for Transient Detection and Classification
- Spectral Kurtosis Statistics of Transient Signals
- The brightness and spatial distributions of terrestrial radio sources
Cited by in corpus (6)
- Mitigating radio frequency interference in CHIME/FRB real-time intensity data
- A VLBI Calibrator Grid at 600MHz for Fast Radio Transient Localizations with CHIME/FRB Outriggers
- An interference detection strategy for Apertif based on AOFlagger 3
- Removal and replacement of interference in tied-array radio pulsar observations using the spectral kurtosis estimator
- Temporal variability in low-frequency radio interference: Insight from high-cadence monitoring at a candidate radio notification zone in Malaysia
- An Overview of CHIME, the Canadian Hydrogen Intensity Mapping Experiment