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arxiveess.SP2026-07-14

GPU-Accelerated Optimisation of Symmetric Bidirectional Ultrawideband Coherent Transmission Under Launch Power Constraints

Mindaugas Jarmolovičius, Eric Sillekens, Polina Bayvel, Robert I. Killey

We optimise bidirectional OESCL-band coherent transmission under total fibre power constraints using a GPU-accelerated boundary-value Raman solver and launch-power optimisation. While no gain is observed without power constraints, for an 18-dBm limit 3-span transmission reversing the O-band direction increases aggregate capacity by up to 24.5%

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arxiveess.SP2026-07-18

Toward a Stable and Deployable Adaptive Chirplet Transform: Residual Projection, Hybrid GPU Acceleration, and Multi-Channel Scalability

Nishant Kumar, Steve Mann

The Adaptive Chirplet Transform is a flexible framework that can decompose non-stationary signals into sparse chirplets; it has been applied to signals such as electroencephalography, electromyography and radar. However, the practical deployment of this transform has been hindere…

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arxiveess.SP2026-07-08

Energy Efficiency Optimization in Distributed MIMO vRAN via Cross-Layer Link Abstraction

Jaebum Park, Chan-Byoung Chae, Robert W. Heath

Virtualized radio access networks (vRAN) run the compute-intensive multiple-input multiple-output (MIMO) baseband as software on shared servers, which makes energy efficiency (EE) a primary design objective. Distributed MIMO vRAN consumes power across virtualized distributed unit…

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arxiveess.SP2026-07-19

Fourth-Order Cyclostationary Analysis of Power-Based Nonlinear Gardner Timing Error Detectors in Coherent Optical Systems

Zhongxing Tian, Zeyu Feng, Huan Huang, Dongdong Zou, Gangxiang Shen, Yi Cai

Power-based nonlinear Gardner timing error detectors (TEDs) can enhance clock-tone (CT) extraction in low-roll-off and bandwidth-limited coherent optical systems. However, their nonlinear power-domain operations make the extracted CT components depend on higher-order cyclic stati…

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arxiveess.SP2026-07-20

Transmit Beamforming Design for Integrated Sensing and Communication Using Transmissive RIS Transceiver

Yuan Guo, Wen Chen, Yang Liu, Qiong Wu, Weiren Zhu

Integrated sensing and communication (ISAC) is a key technology for future wireless networks, calling for hardware-efficient architectures to jointly support communication and sensing. In this paper, a transmissive reconfigurable intelligent surface (TRIS) transceiver is leverage…

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arxiveess.SP2026-07-22

A Covert Precision Satellite Communication Framework Assisted by Cooperative IRSs

Haoyang Wu, Yunfan Bai, Mei Shen, Yuwen Qian, Guangji Chen, Long Shi, et al.

Satellite communication (SatCom), as an effective complement to terrestrial networks, has attracted considerable attention from both academia and industry owing to its wide coverage and high flexibility. However, the inherent openness of satellite links renders them highly vulner…

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