Nonlinear MMSE Equalizer for Impulsive Noise Mitigation in OFDM-Based Communications

Soltanpur, C, Paravi, R, Ghamari, M and Adebisi, B ORCID: https://orcid.org/0000-0001-9071-9120 (2019) Nonlinear MMSE Equalizer for Impulsive Noise Mitigation in OFDM-Based Communications. IEEE Signal Processing Letters, 26 (7). pp. 1016-1020. ISSN 1070-9908

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Official URL: https://ieeexplore.ieee.org/document/8715434

Abstract

© 2019 IEEE. Destructive effects of impulsive noise has been broadly observed not only in wireless communication systems but also in power-line communications. Impulsive noise is a common impediment in orthogonal frequency division multiplexing (OFDM) based communication systems for industry applications. This non-Gaussian noise degrades the performance of conventional equalizers and, hence, elicit a modified version of the equalizer that fits the non-Gaussian description of the noise. This letter proposes a nonlinear minimum mean square error equalizer for OFDM systems where the characteristics of the added noise to the system is known. The soft values were obtained based on the derivation of the equalizer for a memory-less channel impaired with impulsive noise. Obtaining such values are required for the implementation of a turbo-equalization scheme. The validity of such an equalizer is tested through simulations and the result of simulations shows that the nonlinear equalizer is successful in combating the effect of an impulsive noise. Thus, the turbo-coded OFDM system shows a significant boost at low signal-to-noise ratios.

Item Type:	Article
Peer-reviewed:	Yes
Date Deposited:	14 Nov 2019 11:20
Publisher:	IEEE
Additional Information:	"(c) 2019 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, including reprinting/ republishing this material for advertising or promotional purposes, creating new collective works for resale or redistribution to servers or lists, or reuse of any copyrighted components of this work in other works."
Divisions:	Faculties > Science and Engineering
Subject terms:	Impulsive noise, minimum mean square error, nonlinear filters, 0906 Electrical and Electronic Engineering, Networking & Telecommunications
URI:	https://e-space.mmu.ac.uk/id/eprint/624370
DOI:	https://doi.org/10.1109/LSP.2019.2917018
ISSN	1070-9908
e-ISSN	1558-2361

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