Author

Hamid Jafarkhani

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Preprint Oct 2026

Asynchronous Cell-Free Wireless Networks

This paper introduces intentional symbol-level asynchronicity as an interference-management mechanism for the uplink of cell-free networks. Rather than treating timing offsets as impairments, user-specific delays are deliberately assigned to reduce multiuser interference and improve spectral efficiency. A scalable rece...

Hossein Maleki, Angel Lozano, Hamid Jafarkhani · 0 citations

Preprint Aug 2026

Channel-Estimation-Free Beamforming for RIS-Assisted Systems with Limited Feedback

This article considers received-power maximization in RIS-assisted wireless links using only limited received signal strength (RSS) feedback, avoiding explicit estimation of the high-dimensional cascaded channel, and proposes stochastic and deterministic algorithms for passive and active beamforming.

Hossein Maleki, Hamid Jafarkhani · 0 citations