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Decision Directed Impulse Noise Mitigation for OFDM in Frequency Selective Fading Channels
 

Summary: Decision Directed Impulse Noise Mitigation for
OFDM in Frequency Selective Fading Channels
Jean Armstrong and Himal A. Suraweera
Department of Electrical and Computer Systems Engineering
Monash University
Clayton, Victoria 3800, Australia
{Jean.Armstrong}{ Himal.Suraweera}@eng.monash.edu.au
Abstract--Impulse noise is a significant problem in some OFDM
applications including digital television broadcasting. In this
paper we study a novel decision directed impulse mitigation
algorithm both analytically and with simulations for the DVB-T
parameters. In this algorithm the noise component in each
received input sample is estimated based on preliminary
decisions on the transmitted data. When the estimate is large
enough to indicate that impulse noise is present in the sample, the
estimated noise component is subtracted from the input sample
before final demodulation. This technique has been shown to be
extremely effective in flat fading channels. In this paper its
application in frequency selective fading channels is analyzed.
The optimum weighting factors for combining noise estimates

  

Source: Armstrong, Jean - Department of Electrical and Computer Systems Engineering, Monash University

 

Collections: Engineering