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Time‐domain equalizer for multicarrier systems in impulsive noise
Author(s) -
Tan Yee Chieh,
Ramli Nordin Bin,
Chuah Teong Chee
Publication year - 2012
Publication title -
international journal of communication systems
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.344
H-Index - 49
eISSN - 1099-1131
pISSN - 1074-5351
DOI - 10.1002/dac.1256
Subject(s) - computer science , impulse noise , robustness (evolution) , intersymbol interference , algorithm , gaussian noise , time domain , constant false alarm rate , channel (broadcasting) , impulse response , noise (video) , decoding methods , telecommunications , artificial intelligence , mathematics , mathematical analysis , biochemistry , chemistry , pixel , image (mathematics) , computer vision , gene
SUMMARY In multicarrier communication systems, a time‐domain equalizer (TEQ) can be applied to shorten the channel impulse response and to eliminate inter‐symbol interference (ISI). However, the presence of impulsive noise in the channel may paralyze the operation of TEQs and subsequently lead to poor error performance. In this paper, a multicarrier receiver that incorporates a constant false alarm rate algorithm and an iterative estimation technique (CFAR‐IET) in conjunction with a TEQ is proposed to increase the robustness of the receiver against impulsive noise. Furthermore, an improved version of the CFAR‐IET‐TEQ scheme, which uses the buffering, sorting, removing and amplitude averaging (BSRA) processes, is presented. Performance comparisons of the proposed schemes with the existing Gaussian‐optimized schemes are made. Simulation results show that the BSRA‐IET‐TEQ scheme is an effective approach to reduce symbol error rate (SER) in impulsive channels while performing satisfactorily in Gaussian channels. Copyright © 2011 John Wiley & Sons, Ltd.