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Pilot Design for BEM-Based Channel Estimation in Doubly Selective Channel
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DOI：10.1109/TVT.2019.2958976.png)
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Abstract
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This paper investigates pilot design for enhanced channel estimation in single carrier communication systems over doubly-selective channels (DSC). Our contribution is twofold: first, we propose to use Huffman sequences as pilot clusters with low peak-to-average power ratio (PAPR), yet with good channel estimation performance when periodic pilot placement is adopted; second, we propose a low-complexity pilot placement strategy based on the analysis of the complex-exponential basis expansion model (CE-BEM) of the DSC. The latter leads to improved channel estimation performance with useful insights for pilot placement.
Keywords:
Doubly-selective channels
Channel estimation
Huffman sequence
Pilot design
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