P o S(RFI2010)033 P o S(RFI2010)033

Most telecommunication signals contain hidden periodicities due to the periodic characteristics involved in the signals construction (carrier frequency, baud rate, coding scheme...). These period-icities are usually scrambled and hidden by the randomness of the transmitted message. However, by using a cyclostationary approach, this hidden periodicity can be recovered, making the iden-tification of telecommunication signals possible. In this paper, it is shown how cyclostationary spatial processing techniques can limit the impact of the incoming radio frequency interference (RFI) for phased array radio telescopes. Cyclostationarity can be exploited for RFI detection purposes or for filtering purposes. These two RFI mitigation techniques are illustrated through simulations on data acquired with the Westerbork Telescope and the Low Frequency Array Radio telescope, LOFAR, in the Netherlands. RFI mitigation workshop- RFI2010