Continuous Aperture Array (CAPA)-Based Multi-Group Multicast Communications

This paper proposes an energy efficiency maximization framework for continuous aperture array (CAPA)-based multi-group multicast communications by developing an optimal block coordinate descent algorithm and a low-complexity zero-forcing approach, demonstrating CAPA's superior performance over discrete arrays while revealing nuanced impacts of aperture size and user distribution.

Mengyu Qian, Xidong Mu, Li You + 1 more2026-03-10⚡ eess

Fundamental Limits of Rigid Body Localization

This paper proposes a novel, information-centric framework for deriving generic Cramér-Rao Lower Bounds (CRLBs) for rigid body localization that explicitly accounts for both translation and rotation errors under arbitrary measurement types and constraints, providing a versatile tool to evaluate and improve state-of-the-art estimation algorithms.

Niclas Führling, Ivan Alexander Morales Sandoval, Giuseppe Thadeu Freitas de Abreu + 3 more2026-03-10⚡ eess

Improving the Resilience of Quadrotors in Underground Environments by Combining Learning-based and Safety Controllers

This paper proposes a hybrid control framework that enhances quadrotor resilience in underground environments by using a normalizing flow-based prior as a runtime monitor to dynamically switch between a learning-based controller for efficiency and a safety controller for collision avoidance when encountering out-of-distribution scenarios.

Isaac Ronald Ward, Mark Paral, Kristopher Riordan + 1 more2026-03-10⚡ eess

Continuous-Time Analysis of AFDM: Pulse-Shaping, Fundamental Bounds and Impact of Hardware Impairments

This paper bridges the gap between discrete-time models and practical implementation of Affine Frequency Division Multiplexing (AFDM) by establishing a continuous-time analytical framework that derives fundamental bounds, analyzes spectral characteristics under realistic pulse-shaping, and evaluates performance sensitivity to hardware impairments.

Michele Mirabella, Hyeon Seok Rou, Pasquale Di Viesti + 2 more2026-03-06⚡ eess

Exploiting Segmented Waveguide-Enabled Pinching-Antenna Systems (SWANs) for Uplink Tri-Hybrid Beamforming

This paper proposes a tri-hybrid beamforming architecture for uplink multi-user MIMO systems using segmented waveguide-enabled pinching antennas (SWANs), optimizing digital, analog, and pinching components in both fully-connected and interleaved partially-connected structures to achieve superior performance and energy efficiency compared to conventional hybrid and pinching-antenna systems.

Hao Jiang, Chongjun Ouyang, Zhaolin Wang + 4 more2026-03-06⚡ eess