A sparsity-agnostic DD channel estimator exploits Cartesian-product support structure and BIC-based dimension selection to recover exact support with high probability and achieve near-oracle reconstruction accuracy.
Models, methods, and waveforms for estimation and prediction of sparse time–varying channels
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Delay-Doppler Domain Channel Estimation: What if Sparsity is Unknown?
A sparsity-agnostic DD channel estimator exploits Cartesian-product support structure and BIC-based dimension selection to recover exact support with high probability and achieve near-oracle reconstruction accuracy.