5 papers · 1 filter
An Orthogonal Approximate Message Passing Framework for Multiuser Communications
Burak Ãakmak, Hao Yan, Alexander Fengler +2
We solve the open problem of constructing a Bayes-optimal iterative signal recovery algorithm for linear-Gaussian \emph{multiuser} communication systems with random precoding at th…
Optimal Communication Rate of Secure Aggregation over Ring Networks with Pairwise Keys
Xiang Zhang, Han Yu, Zhou Li +2
Information-theoretic topological secure aggregation (TSA)\cite{zhang2026information_regular} enables distributed users to compute neighborhood sums over arbitrary networks without…
Reducing Subpacketization in Device-to-Device Coded Caching via Heterogeneous File Splitting
Xiang Zhang, Giuseppe Caire, Mingyue Ji
The packet type (PT)-based framework~\cite{zhang2026taming} provides a systematic and principled approach to designing device-to-device (D2D) coded caching schemes that achieve red…
On the Fundamental Limits of Hierarchical Secure Aggregation with Dropout and Collusion Resilience
Zhou Li, Yizhou Zhao, Xiang Zhang +1
We study the fundamental communication limits of information-theoretic secure aggregation in a hierarchical network consisting of a server, multiple relays, and multiple users per…
Joint Message Detection, Channel, and User Position Estimation for Unsourced Random Access in Cell-Free Networks
Eleni Gkiouzepi, Burak Ãakmak, Manfred Opper +1
We consider unsourced random access (uRA) in user-centric cell-free (CF) wireless networks, where random access users send codewords from a common codebook during specifically dedi…