Near-field channel estimation is recast as multidimensional polynomial phase estimation via spherical wavefront parameterization, enabling a new estimator with improved accuracy-complexity performance.
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A distributed parallel decomposition framework configures frequency-selective analog and digital beamforming for multiple DMA-equipped BSs in cell-free OFDM, showing robustness to imperfect CSI via numerical results.
Optimizes DMA-based beamforming for bistatic sensing with a physically consistent model including mutual coupling, yielding robust performance comparable to digital arrays via codebook search.