In this letter, we consider the problem of equalizing finite-impulse response (FIR) channels in orthogonal frequency-division multiplexing (OFDM) systems, which employ at the receiver a blanking nonlinearity to mitigate impulsive noise (IN). By exploiting the frequency redundancy associated with the presence of OFDM virtual carriers, we design a frequency-domain linear FIR equalizer that compensates for the intercarrier interference (ICI) generated by nonlinear preprocessing. Monte Carlo computer simulations, carried out assuming a Middleton Class A model for the IN, allows one to assess the error probability performance of the proposed equalizer.
ICI-free equalization in OFDM systems with blanking preprocessing at the receiver for impulsive noise mitigation / Darsena, Donatella; Gelli, Giacinto; Melito, Fulvio; Verde, Francesco. - In: IEEE SIGNAL PROCESSING LETTERS. - ISSN 1070-9908. - 22:9(2015), pp. 1321-1325. [10.1109/LSP.2015.2398366]
ICI-free equalization in OFDM systems with blanking preprocessing at the receiver for impulsive noise mitigation
Darsena, Donatella;GELLI, GIACINTO;MELITO, FULVIO;VERDE, FRANCESCO
2015
Abstract
In this letter, we consider the problem of equalizing finite-impulse response (FIR) channels in orthogonal frequency-division multiplexing (OFDM) systems, which employ at the receiver a blanking nonlinearity to mitigate impulsive noise (IN). By exploiting the frequency redundancy associated with the presence of OFDM virtual carriers, we design a frequency-domain linear FIR equalizer that compensates for the intercarrier interference (ICI) generated by nonlinear preprocessing. Monte Carlo computer simulations, carried out assuming a Middleton Class A model for the IN, allows one to assess the error probability performance of the proposed equalizer.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
