A virtual point source method approximates continuous wavefronts with spherical waves to decouple and solve dual near-field XL-MIMO beamforming non-iteratively, matching iterative optimization performance at lower complexity.
Near-fi eld user localization and channel estimation for XL-MIMO systems: F undamen- tals, recent advances, and outlooks,
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Continuous Wavefront Design via Virtual Point Sources: A Holographic Paradigm for Near-Field XL-MIMO
A virtual point source method approximates continuous wavefronts with spherical waves to decouple and solve dual near-field XL-MIMO beamforming non-iteratively, matching iterative optimization performance at lower complexity.