#spectral efficiency
7 papers match
The Price of Meaning: Quantifying Semantic Communication Overheads in Practice
Xinyi Lin, Peizheng Li, Adnan Aijaz
The paper presents an analytical framework to quantify the spectral and energy overheads of semantic communication, identifying conditions under which semantic compression yields n…
Evolutionary AP Switch ON/OFF Techniques for Energy-efficient Cell-free Massive MIMO Networks
Jan GarcÃa-Morales, Alejandro de la Fuente, David Gualda +3
The paper proposes two evolutionary algorithms—a constrained genetic algorithm and a Pareto-driven genetic algorithm—to select active access points in cell‑free massive MIMO networ…
Modular-CAPA-Based Communication Systems: Joint Activation and Beamforming Design
Mengyu Qian, Xidong Mu, Li You +1
The paper studies a modular continuous aperture array (CAPA) system where only selected sub‑apertures are activated, and proposes joint activation and beamforming designs to maximi…
Switched-Feed Pinching-Antenna Systems for Wideband Terahertz Communications
Wei Jiang, Hans D. Schotten
The paper introduces a Switched-Feed Pinching-Antenna System (SF-PASS) for wideband terahertz communications, modeling waveguide losses, atmospheric effects, and noise, and shows i…
Pinching-Antenna-Assisted Terahertz Communications: Modeling and Benchmarking
Wei Jiang, Hans D. Schotten
The paper presents an analytical model for terahertz pinching antenna systems (PASS) that accounts for waveguide losses, evanescent coupling, and terahertz-specific free‑space effe…
Superimposed Transmission for Cooperative Cellular and Cell-Free Massive MIMO Systems
Wei Jiang, Hans D. Schotten
The paper introduces a superimposed transmission method for cooperative cellular and cell‑free massive MIMO systems, where near users receive an extra data symbol that is decoded u…