A new hybrid precoding framework extracts dominant angles for frequency-flat analog beams and applies binary-search hierarchical interpolation on a Lloyd-quantized codebook to reduce feedback from linear in subcarriers to sub-linear scaling.
Study on feedback reduction techniques in MIMO-OFDM beamforming systems
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Reduced-Feedback Hybrid Precoding for Wideband mmWave MIMO-OFDM Systems
A new hybrid precoding framework extracts dominant angles for frequency-flat analog beams and applies binary-search hierarchical interpolation on a Lloyd-quantized codebook to reduce feedback from linear in subcarriers to sub-linear scaling.