On the Design of Pilot Symbols for OFDM Systems over Doubly-Selective Channels

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We consider the pilot symbols for orthogonal frequency-division multiplexing (OFDM) over doubly selective channels. Locations, powers, and phases of pilot symbols play important roles in the channel estimation. We attempt to minimize the mean-square error (MSE) by selecting powers and phases of pilot symbols. In this paper, based on the MSE-optimal pilot symbols for time-selective and frequency-flat channels, we obtain the pilot symbols for doubly-selective channels. Through simulations, we show the channel estimation performance with the proposed pilot symbols compared to those with the equi-powered pilot symbols and the optimal pilot symbols.
Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
Issue Date
2011-12
Language
English
Article Type
Article
Keywords

OPTIMAL TRAINING SIGNALS

Citation

IEEE COMMUNICATIONS LETTERS, v.15, no.12, pp.1335 - 1337

ISSN
1089-7798
DOI
10.1109/LCOMM.2011.100511.111594
URI
http://hdl.handle.net/10203/95733
Appears in Collection
EE-Journal Papers(저널논문)
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