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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) | ||||||||
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| Title: | Compensation of the Impact of Interference Mitigation by Pulse Blanking in OFDM Systems | ||||||||
| Authors: |
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| Date: | 30 November 2009 | ||||||||
| Journal or Publication Title: | Proc. of IEEE Globecom 2009 | ||||||||
| Refereed publication: | Yes | ||||||||
| In ISI Web of Science: | No | ||||||||
| Editors: |
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| 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: | L SF - Safe and Efficient Air Traffic Guidance | ||||||||
| DLR - Research area: | Aeronautics | ||||||||
| DLR - Program: | L SF - Safe and Efficient Air Traffic Guidance | ||||||||
| 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: | 15 Jan 2010 01:42 |
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