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Channel Estimation for OFDM Systems under Non-Sampled Space and Fast Time-Varying Channels  

김동주 (연세대학교 전기전자공학과 정보통신연구실)
정성순 (연세대학교 전기전자공학과)
홍대식 (연세대학교 전기전자공학부)
강창언 (연세대학교 전기전자공학부)
Publication Information
The Journal of Korean Institute of Communications and Information Sciences / v.29, no.2C, 2004 , pp. 238-246 More about this Journal
Abstract
In this paper, an estimator that take advantages of time and frequency correlation within an OFDM symbol is investigated. OFDM systems using the proposed estimator can be very effective in detecting signals under non-sampled space and time-varying channels. Also, under same complexity, the proposed estimator outperforms the previously proposed estimator. Since even if there are no assumption about channel correlation, the linear interpolation method instead of optimal interpolation using correct channel correlation is proposed in case the receiver does not know the channel correlation function in time domain. Therefore the proposed channel estimator help improving the performance of OFDM systems under non-sampled spaced and fast time-varying channels.
Keywords
OFDM; Channel Estimation; Time-varying Channels; Non-Sampled Space; 2-D interpolation; ICI;
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