Author

Vincent Y. F. Tan

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Preprint Sep 2026

Second-Order Asymptotics for the Gaussian MAC on the Relative Interior of the Sum-Rate Face

This achievability proof builds on the constant composition and coded time-sharing framework of Scarlett, Martinez, and Guill\'en i F\`abregas, with an optimization over admissible power splits, and establishes the optimality of the resulting coded time-sharing strategy.

Vincent Y. F. Tan · 0 citations

Preprint Aug 2026

Second-Order Asymptotics for the Gaussian Multiple-Access Channel at Corner Points

We establish exact second-order coding rate regions at the two corner points of the capacity region of the two-user Gaussian multiple-access channel. For any average error probability $\varepsilon\in(0,1)$, we characterize the $n^{-1/2}$-scale fluctuations of achievable rates around each corner point, proving a convers...

Vincent Y. F. Tan · 1 citation