Impulsive noise suppression in OFDM-based communication systems

Orthogonal frequency division multiplexing (OFDM) is a technique used for terrestrial digital video broadcasting (DVB-T) and many other modern applications. The longer OFDM symbol duration provides an advantage in a presence of weak impulsive noise, because impulsive noise energy is spread among sim...

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Bibliographic Details
Published in:IEEE transactions on consumer electronics 2003-11, Vol.49 (4), p.944-948
Main Author: Zhidkov, S.V.
Format: Article
Language:English
Subjects:
Additive white noise
Algorithms
AWGN
Channels
Communication systems
Demodulation
Digital audio broadcasting
Digital video broadcasting
Electronics
Gaussian noise
Interference
Iterative algorithms
Noise
OFDM modulation
Orthogonal Frequency Division Multiplexing
Signal processing algorithms
Spreads
Symbols
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Summary:Orthogonal frequency division multiplexing (OFDM) is a technique used for terrestrial digital video broadcasting (DVB-T) and many other modern applications. The longer OFDM symbol duration provides an advantage in a presence of weak impulsive noise, because impulsive noise energy is spread among simultaneously transmitted OFDM sub-carriers. However, it has been recently recognized that this advantage turns into a disadvantage if the impulsive noise energy exceeds certain threshold. In this paper the algorithm for impulsive noise suppression in OFDM receivers is proposed and investigated. Whereas traditional methods for impulsive noise suppression are implemented in a time domain before OFDM demodulation, proposed algorithm compensates impulsive noise in a frequency domain after OFDM demodulation and channel equalization. The method is applied to DVB-T and its performance is studied by means of simulation.
ISSN:0098-3063
1558-4127
DOI:10.1109/TCE.2003.1261179