A New RFI Filtering Technique for Weather Radar

A new radio frequency interference (RFI) filter algorithm for weather radars is proposed in the range-pulse time domain. Its operation in two-dimensional (2D) space allows RFI detection at lower interference-to-noise or interference-to-signal ratios compared to filters working only in the pulse time domain, while maintaining very low false alarm rates. Simulations and real weather radar data with RFI are used to perform algorithm comparisons. Results are consistent with theoretical considerations, and show the 2D RFI filter to be a promising addition to the signal processing arsenal against interference to weather radars.

DISTRIBUTION STATEMENT A. Approved for public release: distribution unlimited. This material is based upon work supported by the Federal Aviation Administration under Air Force Contract No. FA8721-05-C-0002 and/or FA8702-15-D-0001. Any opinions, findings, conclusions, or recommendations expressed in this material are those of the author and do not necessarily reflect the views of the Federal Aviation Administration.