Under fixed element count ULAs achieve narrower beamdepth, longer EBRD and higher sum rate than UCAs; under fixed aperture UCAs show marginal gains, with new closed-form EBRD and beamdepth expressions for UCAs.
Exploring frontiers of polar-domain codebooks for near-field channel estimation and beam training: A comprehensive analysis, case studies, and implications for 6G,
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Uniform Circular Arrays in Near-Field: Omnidirectional Coverage with Limited Capacity
Under fixed element count ULAs achieve narrower beamdepth, longer EBRD and higher sum rate than UCAs; under fixed aperture UCAs show marginal gains, with new closed-form EBRD and beamdepth expressions for UCAs.