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Optimal Superimposed Pilot Selection for OFDM Channel Estimation

Varma, Angiras R. and Athaudage, Chandra R. N. and Andrew, Lachlan L. H. and Manton, Jonathan H. (2006) Optimal Superimposed Pilot Selection for OFDM Channel Estimation. In: IEEE 7th Workshop on Signal Processing Advances in Wireless Communications. IEEE , Piscataway, NJ, pp. 1-5.

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This paper presents an optimal strategy for utilizing superimposed pilots for OFDM channel estimation using Wiener filtering. An algorithm is formulated to determine the optimal rectangular set of time-frequency samples for channel estimation for a given complexity. The proposed scheme shows an improved performance at high Doppler frequencies. Moreover, the separable implementation of the 2D Wiener filter leads to a significant reduction in complexity with negligible degradation in channel estimation performance. The sensitivity of the proposed technique to channel statistical mismatches is also analyzed. Numerical results demonstrate the superior performance of the proposed technique compared to conventional selection of square set of time-frequency samples for Wiener-filter based channel estimation.

Item Type:Book Section
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Additional Information:© 2006 IEEE. This work was supported by the Australian Research Council.
Funding AgencyGrant Number
Australian Research CouncilUNSPECIFIED
Subject Keywords:Channel estimation, Time frequency analysis, Wiener filter, Fading, Frequency estimation, Delay estimation, OFDM modulation, Time varying systems, Computer science, Interpolation
Record Number:CaltechAUTHORS:20170810-113956740
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Official Citation:A. R. Varma, C. R. N. Athaudage, L. L. H. Andrew and J. H. Manton, "Optimal Superimposed Pilot Selection for OFDM Channel Estimation," 2006 IEEE 7th Workshop on Signal Processing Advances in Wireless Communications, Cannes, 2006, pp. 1-5. doi: 10.1109/SPAWC.2006.346490 URL:
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:80126
Deposited By: Linqi Guo
Deposited On:11 Aug 2017 21:57
Last Modified:03 Oct 2019 18:27

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