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Impulse Noise Mitigation for OFDM Using Decision Directed Noise Jean Armstrong and Himal A. Suraweera

Summary: Impulse Noise Mitigation for OFDM Using Decision Directed Noise
Jean Armstrong and Himal A. Suraweera
Department of Electronic Engineering, La Trobe University,
Melbourne, Victoria 3086, Australia.
This work was supported by an Australian Research Council (ARC) Large Grant.
Abstract-- This paper describes a new technique for mitigating
the effects of impulse noise in OFDM. An estimate is made of
the noise component in each received input sample. The
estimates are based on the transmitted data. No pilot tones are
required. 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. Estimates of the noise are obtained from
preliminary decisions based on the noisy signal. The technique
is effective because the energy from each noise impulse is spread
across the received spectrum. The technique can also be applied
to multicarrier CDMA. Simulations show that in cases of
practical importance the symbol error rate can be reduced by


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


Collections: Engineering