A K-SVD-learned codebook operating in the wavenumber domain can precode for near-field and far-field users simultaneously, without region identification, and beats DFT and polar codebooks in simulations.
Multiple access for near-field communications: SDMA or LDMA?
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New Paradigm for Unified Near-Field and Far-Field Wireless Communications
A K-SVD-learned codebook operating in the wavenumber domain can precode for near-field and far-field users simultaneously, without region identification, and beats DFT and polar codebooks in simulations.