Pilot and Data Aided Channel Estimation for OFDM systems in Rapidly Time-Varying Channels

In this paper, we propose an efficient estimation technique for time-varying multipath channels by exploiting two dimensional delay-time nature in pilot inserted orthogonal frequency division multiplexing (OFDM) systems. The proposed technique consists of multipath snapshot estimation at periodic ch...

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Bibliographic Details
Published inVTC Spring 2009 - IEEE 69th Vehicular Technology Conference pp. 1 - 5
Main Authors Jungwook Wee, Wongi Jeon, Younsung Lee, Kiwon Kwon, Yongsoo Cho
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.04.2009
Subjects
AWGN
Channel estimation
Delay estimation
Frequency estimation
Interference
Interpolation
Multipath channels
OFDM
Time domain analysis
Time-varying channels
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Summary:In this paper, we propose an efficient estimation technique for time-varying multipath channels by exploiting two dimensional delay-time nature in pilot inserted orthogonal frequency division multiplexing (OFDM) systems. The proposed technique consists of multipath snapshot estimation at periodic channel observation instances over an OFDM block and the linear interpolation of two consecutive multipath snapshots. Two decision-directed data utilizing schemes, data removed and data added correlation schemes, are proposed to enhance the performance of the multipath snapshot estimation.
ISSN:1550-2252
DOI:10.1109/VETECS.2009.5073802