Adaptive Threshold Optimization for a Blanking Nonlinearity in OFDM Receivers
The application of a blanking nonlinearity to cope with impulsive interference is a common approach in OFDM systems. The choice of the amplitude threshold to decide whether a received sample is blanked, heavily affects the performance of the entire transmission. As a matter of fact, the perfect blanking threshold strongly depends on the characteristics of the interference. In previous publications this perfect threshold has been derived, given knowledge about the interference statistics. In general, however, no reliable information about the interference statistics is known at the receiver side.