Modified decision feedback channel estimation method for mobile OFDM systems

Dah Chung Chang, Shih Kang Wang

研究成果: 書貢獻/報告類型會議論文篇章同行評審

摘要

In time-varying mobile channels, the Doppler effect causes intercarrier interference (ICI) in an OFDM system. A lot of research has been found to mitigate the ICI effect in order to improve the system performance. However, ICI reduction algorithms usually require the information of the channel impulse response (CIR) sample by sample. In this paper, we propose a new decision feedback ICI cancellation (DFIC) algorithm with modified decision feedback CIR estimation. The proposed DFIC algorithm uses the time-domain Kalman filter for initial CIR estimation for the coefficients of the DFIC equalizer. Then, the iterative decision feedback loop can be used to enhance the estimation of CIR values such that more accurate coefficients can be obtained. Simulation results show that the proposed ICI mitigation algorithm incorporating decision feedback channel estimation is effective to deal with the ICI in mobile OFDM channels.

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主出版物標題2011 20th International Conference on Computer Communications and Networks, ICCCN 2011 - Proceedings
DOIs
出版狀態已出版 - 2011
事件2011 20th International Conference on Computer Communications and Networks, ICCCN 2011 - Maui, HI, United States
持續時間: 31 7月 20114 8月 2011

出版系列

名字Proceedings - International Conference on Computer Communications and Networks, ICCCN
ISSN(列印)1095-2055

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???event.eventtypes.event.conference???2011 20th International Conference on Computer Communications and Networks, ICCCN 2011
國家/地區United States
城市Maui, HI
期間31/07/114/08/11

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