RFI mitigation with the time-frequency robust statistical analysis

Abstract The real sensitivity of radio astronomical stations is often limited by man-made radio emissions, radio frequency interference (RFI) due to activities such as broadcasting operations, radars, and a variety of communication and radiolocation systems. Time-frequency analysis with high temporal and frequency resolution allows us to detect and excise RFI better than can be done with existing standard radiotelescope backends. The statistical errors of the total power, correlation factor and spectral density may be substantially reduced when robust statisitical methods are applied to data.