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Groh, Ingmar und Gentner, Christian und Sand, Stephan (2012) Iterative Intercarrier Interference Mitigation for Pilot-Aided OFDM Channel Estimation Based on Channel Linearizations. 76th IEEE Vehicular Technology Conference (VTC-Fall), 3-6 Sep 2012, Québec City, Canada.
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Kurzfassung
Orthogonal frequency division multiplexing (OFDM) became a popular transmission approach since it suppresses intersymbol interference (ISI) due to large channel delays. However, intercarrier interference (ICI) for high mobility receivers yields corrupted channel estimates for pilot-aided OFDM channel estimation. Thus, this paper presents a novel time-variant channel estimation approach to mitigate this system impairment. We linearize the time-variant channel and determine the expansion point by channel estimates corresponding to the current OFDM symbol, and we get the unknown channel slopes by an iterative data and channel estimation. Our algorithm combines a least squares or a minimum norm channel slope estimation and the detection of the channel paths. It sets any channel path power equal zero once the corresponding power estimate is smaller than a given threshold. Our algorithm exploits the large channel correlations between the cyclic prefix and the successive OFDM symbol optimally. These maximum correlations reason the superiority of ICI mitigation with cyclic prefixes compared to channel slope estimation with adjacent OFDM symbols, which needs at least twice the number of pilot symbols. Additionally, our iterative ICI mitigation reduces noise impairments.
| elib-URL des Eintrags: | https://elib.dlr.de/75677/ | ||||||||||||||||
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| Dokumentart: | Konferenzbeitrag (Vortrag) | ||||||||||||||||
| Titel: | Iterative Intercarrier Interference Mitigation for Pilot-Aided OFDM Channel Estimation Based on Channel Linearizations | ||||||||||||||||
| Autoren: |
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| Datum: | 2012 | ||||||||||||||||
| Referierte Publikation: | Ja | ||||||||||||||||
| Open Access: | Nein | ||||||||||||||||
| Gold Open Access: | Nein | ||||||||||||||||
| In SCOPUS: | Nein | ||||||||||||||||
| In ISI Web of Science: | Nein | ||||||||||||||||
| Status: | veröffentlicht | ||||||||||||||||
| Stichwörter: | orthogonal frequency division multiplexing, intercarrier interference, Taylor series expansion, iterative timevariant pilot-aided channel estimation | ||||||||||||||||
| Veranstaltungstitel: | 76th IEEE Vehicular Technology Conference (VTC-Fall) | ||||||||||||||||
| Veranstaltungsort: | Québec City, Canada | ||||||||||||||||
| Veranstaltungsart: | internationale Konferenz | ||||||||||||||||
| Veranstaltungsdatum: | 3-6 Sep 2012 | ||||||||||||||||
| Veranstalter : | IEEE Vehicular Technology Society | ||||||||||||||||
| HGF - Forschungsbereich: | Verkehr und Weltraum (alt) | ||||||||||||||||
| HGF - Programm: | Weltraum (alt) | ||||||||||||||||
| HGF - Programmthema: | W KN - Kommunikation/Navigation | ||||||||||||||||
| DLR - Schwerpunkt: | Weltraum | ||||||||||||||||
| DLR - Forschungsgebiet: | W KN - Kommunikation/Navigation | ||||||||||||||||
| DLR - Teilgebiet (Projekt, Vorhaben): | W - Vorhaben GNSS2/Neue Dienste und Produkte (alt) | ||||||||||||||||
| Standort: | Oberpfaffenhofen | ||||||||||||||||
| Institute & Einrichtungen: | Institut für Kommunikation und Navigation > Nachrichtensysteme | ||||||||||||||||
| Hinterlegt von: | Sand, Dr Stephan | ||||||||||||||||
| Hinterlegt am: | 27 Sep 2012 09:33 | ||||||||||||||||
| Letzte Änderung: | 29 Mär 2023 00:15 |
Verfügbare Versionen dieses Eintrags
- Iterative Intercarrier Interference Mitigation for Pilot-Aided OFDM Channel Estimation Based on Channel Linearizations. (deposited 27 Sep 2012 09:33) [Gegenwärtig angezeigt]
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