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Author

John M. Cioffi

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Continuous-Utility Direct Preference Optimization

It is proved that learning with K strategies yields a Theta(K log K) improvement in sample complexity over binary preferences and that DPO converges to the entropy-regularized utility-maximizing policy.

M. Mohsin, Muhammad Umer, Ahsan Bilal et al. · 0 citations
Preprint Sep 2026

Cooperative Dynamic Spectrum Access for Cell-Free MISO Networks Using Spectrum Consumption Models

Simulations in an indoor warehouse setting show that the proposed DSA mechanism better utilizes the spatial dimension for spectrum sharing, and a leakage-aware iterative water-filling precoder using uplink-downlink reciprocity, a power-control method that further encourages spectrum sharing, and a sequential admission...

Jiwon Sung, Seung-Min Choi, A. Gorle et al. · 0 citations
Preprint Aug 2026

End-to-End Mobility-Aware Multi-RIS Optimization via Blockage Detection and Closed-Form Riemannian Updates

This paper proposes an end-to-end mobility-aware multi-RIS optimization framework that integrates per-RIS blockage detection with closed-form Riemannian updates and jointly optimize the BS precoder and RIS phases using a Stochastic Closed-form Riemannian Phase Alignment algorithm.

Sehyun Ryu, Seung-Min Choi, Hyun Jong Yang et al. · 0 citations
Preprint Sep 2026

A Multiuser Channel Capacity Region

A finite structural characterization of the U-user multiuser channel-capacity region appears here, and it is shown that maximum rate sum for any Gaussian multiple-user-channel derives from simple iterative procedures.

John M. Cioffi · 0 citations

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