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Mitigation of radio frequency interference (RFI) is essential to deliverscience-ready radio interferometric data to astronomers. In this paper, usingdual polarized radio interferometers, we propose to use the polarizationinformation of post-correlation interference signals to detect and mitigatethem. We use the directional statistics of the polarized signals as thedetection criteria and formulate a distributed, wideband spectrum sensingproblem. Using consensus optimization, we solve this in an online manner,working with mini-batches of data. We present extensive results based onsimulations to demonstrate the feasibility of our method.

Polarization-based online interference mitigation in radio interferometry