Active subsets concentrate in hemispheres for β<2, enabling two-stage decoding with vanishing pre-filter error and exponential ML error for β<1/4 in many-access Gaussian MACs.
Distributions of Angles in Random Packing on Spheres
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Hemispherical Concentration Subset Recovery in Many-Access Gaussian Multiple-Access Channels
Active subsets concentrate in hemispheres for β<2, enabling two-stage decoding with vanishing pre-filter error and exponential ML error for β<1/4 in many-access Gaussian MACs.