| Post Correlation versus Real-Time Adaptive RFI Cancellation (2007) | |||||||||||||
Abstract | |||||||||||||
| In radio astronomy real-time adaptive filters (and their post-correlation equivalents) can be used to model the RFI environment so that it can be cancelled from the astronomy signal path. In this paper we describe a modified filter which utilises an additional reference signal to improve the RFI excision. The trade-o# is that the injected noise of the new filter is stronger than the total residual of the standard filter. We compare residual RFI and injected noise levels with that of the standard filter and the post-correlation approach. An example from the Australia Telescope Compact Array is also given. | |||||||||||||
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