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Advanced Blanking Nonlinearity for Mitigating Impulsive Interference in OFDM Systems

Epple, Ulrich and Schnell, Michael (2017) Advanced Blanking Nonlinearity for Mitigating Impulsive Interference in OFDM Systems. IEEE Transactions on Vehicular Technology, vol 66 (no 1), pp. 146-158. IEEE - Institute of Electrical and Electronics Engineers. DOI: 10.1109/TVT.2016.2535374 ISSN 0018-9545

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Official URL: http://ieeexplore.ieee.org/abstract/document/7420747/

Abstract

In this paper, we introduce advancements of the conventional blanking nonlinearity for OFDM based systems, in the following referred to as advanced blanking nonlinearity. Blanking is a common measure for mitigating impulsive interference which often occurs in wireless communication systems. Although the blanking nonlinearity removes impulsive interference reliably, it possesses various drawbacks for OFDM based systems. In particular, the choice of the blanking threshold, in order to decide whether a received sample is blanked, is a critical issue. We present an algorithm for determining the optimal blanking threshold so as to maximize the signal-to-noise-and-interference ratio after blanking. Another drawback is that the entire received signal is discarded during a blanking interval despite the fact that only a fraction of the spectrum of the OFDM signal might be affected by interference. We show, how blanking can be limited to sub-carriers which are actually affected by interference. Further, we show how these measures can be combined and how a priori information, obtained in an iterative loop, can be incorporated into the proposed scheme. Simulation results incorporating realistic channel and interference models demonstrate the effectiveness of the proposed scheme.

Item URL in elib:https://elib.dlr.de/103214/
Document Type:Article
Title:Advanced Blanking Nonlinearity for Mitigating Impulsive Interference in OFDM Systems
Authors:
AuthorsInstitution or Email of AuthorsAuthors ORCID iD
Epple, UlrichUNSPECIFIEDUNSPECIFIED
Schnell, MichaelMichael.Schnell (at) dlr.deUNSPECIFIED
Date:January 2017
Journal or Publication Title:IEEE Transactions on Vehicular Technology
Refereed publication:Yes
Open Access:No
Gold Open Access:No
In SCOPUS:Yes
In ISI Web of Science:Yes
Volume:vol 66
DOI :10.1109/TVT.2016.2535374
Page Range:pp. 146-158
Publisher:IEEE - Institute of Electrical and Electronics Engineers
ISSN:0018-9545
Status:Published
Keywords:OFDM, impulsive interference, interference mitigation, blanking nonlinearity
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:air traffic management and operations
DLR - Research area:Aeronautics
DLR - Program:L AO - Air Traffic Management and Operation
DLR - Research theme (Project):L - Communication, Navigation and Surveillance
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Communications Systems
Deposited By: Schnell, Dr.-Ing. Michael
Deposited On:14 Feb 2017 15:00
Last Modified:06 Sep 2019 15:17

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