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Summary: Abstract-- Although multicarrier modulation techniques
are inherently more resistant to impulse noise than single
carrier systems, impulse noise can still be a significant
problem in many applications including digital television.
A number of impulse noise mitigation algorithms are
investigated. These use non linear processing on the digital
input signals to limit the size of impulses reaching the
demodulator. It is shown that when the noise at the input is
highly impulsive, significant reduction in the signal to noise
ratio can be achieved. The most effective non-linearity is
clipping of input signal samples with large amplitudes.
I. INTRODUCTION
Orthogonal frequency division multiplexing
(OFDM) technology is used for digital television
transmission in many countries including Australia
and much of Europe [1]. OFDM was chosen for
this application partly because it is more resistant to
impulse noise than single carrier systems. However
impulse noise can cause problems in digital
television reception. Interference caused by turning
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