Author

Jia-Ming Xu

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Preprint Sep 2026

Aperiodic random walks: uniform estimates, local limits and invariance principles

We prove uniform endpoint estimates, killed local limits, and conditioned-bridge invariance principles for triangular arrays of centered, aperiodic, integer-valued random walks with uni- form exponential tails. The endpoint estimates cover all nonnegative heights, while the local limits treat positive diffusive and zer...

Jia-Ming Xu · 0 citations

2026

Secure Hierarchical RSMA Against Multiple External and Internal Eavesdroppers

Existing secure rate splitting multiple access (RSMA) designs are typically tailored to either external or internal eavesdropping and may be ineffective in mixed scenarios where both coexist. To address mixed internal and external eavesdropping, we propose a novel secure hierarchical RSMA (HRSMA) framework. In this fra...

Guang-Qian Peng, Ning-Bo Zhang, Wen-Bo Xu et al. · IEEE Communications Letters · 0 citations