Optimal Superimposed Pilot Selection for OFDM Channel Estimation
Abstract
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.
Additional Information
© 2006 IEEE. This work was supported by the Australian Research Council.Attached Files
Published - 04153906.pdf
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Additional details
- Eprint ID
- 80126
- Resolver ID
- CaltechAUTHORS:20170810-113956740
- Australian Research Council
- Created
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2017-08-11Created from EPrint's datestamp field
- Updated
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2021-11-15Created from EPrint's last_modified field