Two heuristics for A-optimal pilot pattern selection in finite-block OFDM over doubly dispersive channels outperform rectangular and diamond lattices in simulations.
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Optimal Pilot Pattern Design for LMMSE Channel Estimation in OFDM Systems with Finite Block Size over Doubly Dispersive Channels
Two heuristics for A-optimal pilot pattern selection in finite-block OFDM over doubly dispersive channels outperform rectangular and diamond lattices in simulations.