Two-dimensional pilot-aided channel estimation for wireless OFDM systems over severe frequency-selective fading environments

Chien Yu Huang, Wen Jeng Lin, Jia Chin Lin, Jung Shan Lin

研究成果: 書貢獻/報告類型會議論文篇章同行評審

3 引文 斯高帕斯(Scopus)

摘要

Orthogonal frequency division multiplexing (OFDM) technique is effective and powerful in high data rate digital transmission due to its spectral efficiency, robustness in multipath propagation environments and ability to cope with intersymbol interference. Channel estimation is a crucial problem in coherent OFDM systems, and the various estimation techniques with particular pilot arrangements have been investigated recently. In this paper, a two-dimensional pilotaided channel estimation technique is developed for wireless OFDM communications under severe frequency-selective fading channels. By applying least-square (LS) estimation for the leading pilot symbol in time domain, the channel statistics can be obtained and preserved. And then, LS estimation is also applied for the following regular pilot tones in the OFDM data symbol. Based on the variation of the two LS estimates in the time domain, a novel two-dimensional pilotaided channel estimation algorithm is presented. From the simulation results, the proposed channel estimation scheme has superior performance in the severe frequency-selective fading channels, especially in high SNR. Even if the mobile speed rises, the proposed algorithm still achieves excellent performance.

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主出版物標題IWCMC 2006 - Proceedings of the 2006 International Wireless Communications and Mobile Computing Conference
頁面1027-1032
頁數6
DOIs
出版狀態已出版 - 2006
事件IWCMC 2006 - 2006 International Wireless Communications and Mobile Computing Conference - Vancouver, BC, Canada
持續時間: 3 7月 20066 7月 2006

出版系列

名字IWCMC 2006 - Proceedings of the 2006 International Wireless Communications and Mobile Computing Conference
2006

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???event.eventtypes.event.conference???IWCMC 2006 - 2006 International Wireless Communications and Mobile Computing Conference
國家/地區Canada
城市Vancouver, BC
期間3/07/066/07/06

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