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Compensation of the Impact of Interference Mitigation by Pulse Blanking in OFDM Systems

Brandes, Sinja and Epple, Ulrich and Schnell, Michael (2009) Compensation of the Impact of Interference Mitigation by Pulse Blanking in OFDM Systems. In: Proc. of IEEE Globecom 2009. IEEE Global Communications Conference (GlobeCom) 2009, 30.11. - 4.12.2009, Honolulu, HI, USA. ISBN 978-1-4244-4148-8. ISSN 1930-529X

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Abstract

When pulsed interference is mitigated by means of pulse blanking, interference is reduced significantly. However, at the same time certain fractions of the useful orthogonal frequency-division multiplexing (OFDM) signal are erased. Consequently, only moderate improvements are achieved with pulse blanking. When representing the pulse blanking operation as multiplication with a rectangular window exhibiting notches at the positions where blanks are inserted, it becomes obvious, that pulse blanking mainly leads to inter-carrier interference (ICI). In this paper, the compensation of the impact of pulse blanking is proposed by reconstructing and subtracting ICI. The required shape of the subcarrier spectra is derived from the pulse blanking window. For an estimation of the transmitted data symbols and the channel coefficients of each subcarrier an iterative receiver structure is proposed. Simulation results at hand of a realistic interference scenario show that with perfect channel estimation and known data symbols the impact of pulse blanking can be reduced to a small loss in signal-to-noise ratio resulting from the energy loss due to erasing a certain fraction of the OFDM signal. With real channel estimation and estimated data symbols, the ideal case with perfect channel estimation and known data symbols is approached by 1.2 dB after only three iterations.

Document Type:Conference or Workshop Item (Speech, Paper)
Title:Compensation of the Impact of Interference Mitigation by Pulse Blanking in OFDM Systems
Authors:
AuthorsInstitution or Email of Authors
Brandes, SinjaUNSPECIFIED
Epple, UlrichUNSPECIFIED
Schnell, MichaelUNSPECIFIED
Date:30 November 2009
Journal or Publication Title:Proc. of IEEE Globecom 2009
Refereed publication:Yes
In ISI Web of Science:No
Editors:
EditorsEmail
UNSPECIFIEDThe Institute of Electrical and Electronics Engineers, Inc. (IEEE)
ISSN:1930-529X
ISBN:978-1-4244-4148-8
Status:Published
Keywords:OFDM, pulse blanking, compensation
Event Title:IEEE Global Communications Conference (GlobeCom) 2009
Event Location:Honolulu, HI, USA
Event Type:Conference
Event Dates:30.11. - 4.12.2009
Organizer:IEEE
HGF - Research field:Aeronautics, Space and Transport
HGF - Program:Aeronautics
HGF - Program Themes:ATM and Operation
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
Deposited By: Sinja Brandes
Deposited On:11 Jan 2010 11:09
Last Modified:12 Dec 2013 20:40

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