RFImitigation methods in radio astronomy

Various methods of radio frequency interference (RFI) mitigation methods at radio astronomy telescopes are being considered. Special attention is given to real-time processing algorithms. Computer simulations and observational results are used to describe the applicability of these methods. Best results can be achieved when the RFI mitigation procedures are adapted to the particular radio telescope, the type of observations, and the peculiarities of the RFI environment. A combination of different linear and non-linear methods in the temporal and frequency domains, with and without the use of reference antennas, may give considerable suppression of strong RFI.