Allen Telescope Array digital processing requirements driven by radio frequency interference concerns

Harp, G. R.

doi:10.1029/2004rs003134

Cited by 3 publications

(3 citation statements)

References 16 publications

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“…The process works well (Harp,[5]), but has serious implications for the bandwidth of the phase tracking machinery.…”

Section: Null Steeringmentioning

confidence: 99%

Overview of RFI mitigation methods in existing and new systems (invited)

Kesteven¹

2010

Proceedings of RFI Mitigation Workshop — PoS(RFI2010)

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Significant progress has been made in developing techniques for RFI mitigation. A number of these techniques have had successful demonstrations and field trials. However the take-up at the observatories has been low. At the present time the strategy of choice is simple editing. This paper assesses the new techniques and explores the reasons for the low level of support by the astronomers RFI mitigation workshop -RFI2010,

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“…The process works well (Harp,[5]), but has serious implications for the bandwidth of the phase tracking machinery.…”

Section: Null Steeringmentioning

confidence: 99%

Overview of RFI mitigation methods in existing and new systems (invited)

Kesteven¹

2010

Proceedings of RFI Mitigation Workshop — PoS(RFI2010)

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“…Assuming the RFI sources are localized, their suppression is then achieved by processing short time intervals of the data stream, and applying complex weighting during image processing [41]. Computer simulations of post-correlation spatial filtering show that cleaning with an RFI-corrected beam can be effective [42].…”

Section: Spatial Filtering and Null Steeringmentioning

confidence: 99%

RFI Mitigation in Radio Astronomy (invited)

Baan¹

2010

Proceedings of RFI Mitigation Workshop — PoS(RFI2010)

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This paper presents an overview of methods for mitigating radio frequency interference (RFI) in radio astronomy data. The primary purpose of mitigation is to assist observatories to take useful data outside frequency bands allocated to the Radio Astronomy Service (RAS): mitigation should not be needed within RAS bands. Mitigation methods may be introduced at a variety of points within the data acquisition system. These range from proactive methods to change the local RFI environment by means of regulatory manners, to pre-and post-detection methods, to various precorrelation methods, and to methods applied at correlation and post-correlation. Every method of RFI mitigation results in data loss. A forward look is presented on the implementation of methods to cope with changing interference environments at observatories. RFI mitigation workshop -RFI2010,

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“…A station-level correlator will be needed to provide the calibration needed for the beamformer, so much of the required machinery will already be in place. Recent work at the Allen telescope ( [12]) suggests that this may entail substantial processing effort. Alternatively, adaptive filtering on the beamformer output is a possibility.…”

Section: Rfi Mitigation For the Next Generation Of Telescope Arrays (mentioning

confidence: 99%

Radio Frequency Interference Mitigation in Radioastronomy

Kesteven

Proceedings. (ICASSP '05). IEEE International Conference on Acoustics, Speech, and Signal Processing, 2005.

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RFI is increasingly a problem for radioastronomy with the ever expanding use of the radio spectrum by both the communications industry (transmitting) and the radioastronomers (receiving). Regulation can protect a few windows in the radio spectrum, but many experiments now need to access parts of the spectrum outside the reserved regions. Spectral lines, for example, may be significantly doppler-shifted, and therefore require an observation window far from their rest frequencies.

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Allen Telescope Array digital processing requirements driven by radio frequency interference concerns

Cited by 3 publications

References 16 publications

Overview of RFI mitigation methods in existing and new systems (invited)

Overview of RFI mitigation methods in existing and new systems (invited)

RFI Mitigation in Radio Astronomy (invited)

Radio Frequency Interference Mitigation in Radioastronomy

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