elib
DLR-Header
DLR-Logo -> http://www.dlr.de
DLR Portal Home | Imprint | Privacy Policy | Contact | Deutsch
Fontsize: [-] Text [+]

Mitigation of Dynamically Changing NBI in OFDM Based Overlay Systems

Brandes, Sinja and Schnell, Michael (2007) Mitigation of Dynamically Changing NBI in OFDM Based Overlay Systems. In: Multi-Carrier Spread Spectrum 2007, pp. 117-126. Springer. 2007 MC-SS Workshop, 2007-05-07 - 2007-05-09, Herrsching, Germany. ISBN 978-1-4020-6128-8.

[img] PDF - Only accessible within DLR
436kB

Abstract

In overlay systems based on orthogonal frequency-division multiplexing (OFDM) narrow-band interference (NBI) from licensed systems transmitting in the same frequency band degrades system performance significantly. In this paper, the impact of NBI is either reduced by means of an optimized compensation matrix or by simply subtracting an estimated NBI signal from the received signal. The required estimation of the NBI signal is performed by means of a few observation subcarriers. Variations in the center frequency of the interferer are tracked by exploiting information from pilot OFDM symbols for channel estimation. Simulation results show that with both techniques system performance is improved significantly even in presence of strong and dynamically changing NBI.

Item URL in elib:https://elib.dlr.de/47611/
Document Type:Conference or Workshop Item (Speech, Paper)
Title:Mitigation of Dynamically Changing NBI in OFDM Based Overlay Systems
Authors:
AuthorsInstitution or Email of AuthorsAuthor's ORCID iD
Brandes, SinjaUNSPECIFIEDUNSPECIFIED
Schnell, MichaelUNSPECIFIEDUNSPECIFIED
Date:1 March 2007
Journal or Publication Title:Multi-Carrier Spread Spectrum 2007
Refereed publication:No
Open Access:No
Gold Open Access:No
In SCOPUS:No
In ISI Web of Science:No
Page Range:pp. 117-126
Editors:
EditorsEmailEditor's ORCID iD
Plass, SimonUNSPECIFIEDUNSPECIFIED
Dammann, ArminUNSPECIFIEDUNSPECIFIED
Kaiser, StefanUNSPECIFIEDUNSPECIFIED
Fazel, KhaledUNSPECIFIEDUNSPECIFIED
Publisher:Springer
ISBN:978-1-4020-6128-8
Status:Published
Keywords:OFDM, overlay system, NBI
Event Title:2007 MC-SS Workshop
Event Location:Herrsching, Germany
Event Type:international Conference
Event Dates:2007-05-07 - 2007-05-09
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:11 Jun 2007
Last Modified:12 Dec 2013 20:23

Repository Staff Only: item control page

Browse
Search
Help & Contact
Information
electronic library is running on EPrints 3.3.12
Copyright © 2008-2017 German Aerospace Center (DLR). All rights reserved.