Joint channel tracking and symbol detection for OFDM systems with Kalman filtering
Yükleniyor...
Dosyalar
Tarih
2003
Yazarlar
Dergi Başlığı
Dergi ISSN
Cilt Başlığı
Yayıncı
Urban & Fischer Verlag
Erişim Hakkı
info:eu-repo/semantics/closedAccess
Özet
This paper proposes a new joint channel tracking and symbol detection scheme for pilot symbol-assisted OFDM systems in multipath fading. The proposed scheme uses Kalman filters for both channel tracking and subsequent equalization which are combined in the coupled estimator structure. Modelling the multipath fading channel as random processes to describe channel variations in a general AR framework lends itself to a state-space representation that enables the application of Kalman filtering for the tracking of channel variations. However, the proposed tracking algorithm requires knowledge of the transmitted symbols. This implies that an iterative method should be sought to obtain alternatively either channel or transmitted symbols. To compose the coupled estimator structure, a linear Kalman filter equalizer with the corresponding state-space model is therefore proposed for the detection of transmitted symbols. With the proposed Kalman filters, iterative structure is utilized to decode transmitted symbols and subsequently to track channel parameters. Finally, the performance of the proposed method is investigated through the experimental results.
Açıklama
This work was supported in part by The Research Fund of The University of Istanbul, Project numbers: UDP-45/24072002, 1680/15082001and The Scientific and Technical Council of Turkey (TUBITAK) Project number: 100EE006.
Anahtar Kelimeler
OFDM systems, Joint channel estimation and symbol detection, Broadcasting, Iterative methods, Kalman filtering, Parameter estimation, Random processes, State space methods, Channel tracking, Channel variations, Orthogonal frequency division multiplexing
Kaynak
AEU-International Journal of Electronics and Communications
WoS Q Değeri
Q2
Scopus Q Değeri
Q2
Cilt
57
Sayı
5
Künye
Şen, A., Çırpan, H. A. & Panayırcı, E. (2003). Joint channel tracking and symbol detection for OFDM systems with kalman filtering. AEU-International Journal of Electronics and Communications, 57(5), 317-327. doi:10.1078/1434-8411-54100178
