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Mitigation of Pulsed Interference in OFDM Based Systems

Brandes, Sinja and Schnell, Michael (2008) Mitigation of Pulsed Interference in OFDM Based Systems. In: 13th International OFDM-Workshop 2008 (InOWo '08), pp. 193-197. 13th International OFDM-Workshop 2008 (InOWo '08), 2008-08-27 - 2008-08-28, Hamburg, Germany.

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Abstract

In order to enhance spectral efficiency an orthogonal frequency-division multiplexing (OFDM) based system is operated in a frequency band already in use by a licensed system. When transmitting an OFDM signal in the spectral gaps left by the licensed system, the OFDM system is exposed to severe interference, in the considered example characterised by short but strong Gaussian shaped pulses. Well-known approaches for mitigating the impact of pulsed interference are pulse blanking or clipping. As these techniques have not been applied to OFDM systems with this type of interference so far, the optimal thresholds for both techniques are determined. Simulations in a realistic interference scenario in the L-band show, that with clipping or pulse blanking based on the optimal threshold the impact of interference can be reduced considerably. The remaining gap to the interference-free case can be partly explained by the fact that not only the interference signal but also the desired OFDM signal is affected by pulse blanking or clipping.

Item URL in elib:https://elib.dlr.de/54508/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Mitigation of Pulsed Interference in OFDM Based Systems
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iDORCID Put Code
Brandes, SinjaUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Schnell, MichaelUNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Date:11 July 2008
Journal or Publication Title:13th International OFDM-Workshop 2008 (InOWo '08)
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 193-197
Editors:
EditorsEmailEditor's ORCID iDORCID Put Code
Technische Universität Hamburg-Harburg (TUHH), UNSPECIFIEDUNSPECIFIEDUNSPECIFIED
Status:Published
Keywords:OFDM, DME interference, pulse blanking, clipping, interference mitigation
Event Title:13th International OFDM-Workshop 2008 (InOWo '08)
Event Location:Hamburg, Germany
Event Type:international Conference
Event Start Date:27 August 2008
Event End Date:28 August 2008
Organizer:Technische Universität Hamburg-Harburg
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:ATM and Operation (old)
DLR - Research area:Aeronautics
DLR - Program:L AO - Air Traffic Management and Operation
DLR - Research theme (Project):L - Effiziente Flugführung und Flugbetrieb (old)
Location: Oberpfaffenhofen
Institutes and Institutions:Institute of Communication and Navigation > Communications Systems
Deposited By: Brandes, Sinja
Deposited On:10 Nov 2008
Last Modified:24 Apr 2024 19:18

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