XLIV Simpósio Brasileiro de Telecomunicações e Processamento de Sinais

Este artigo apresenta um estudo sobre a predição objetiva da inteligibilidade em ambientes acústicos industriais. No experimento, foram consideradas as medidas objetivas ESTOI, ESII e ASII_ST para a avaliação da inteligibilidade em diversos cenários acústicos. Adicionalmente, foi investigado o efeito do ruído e da reverberação, típicos desses ambientes,...

This paper proposes a hybrid architecture for FIR filter design, combining windowing, neural networks, and optimization. It generates a digital weighting envelope, iteratively adjusted by a loss function, that penalizes ripple and attenuation violations. The resulting filter is generated by the product of this envelope and the ideal filter. Experimental...

This study examines 4G and 5G mobile network coverage and link quality on a Brazilian university campus. Empirical cumulative distribution functions of the reference signal received power (RSRP) and the signal-to-interference-plus-noise ratio (SINR) are employed to assess coverage and link quality in both indoor and outdoor environments. Measurement...

Private mobile networks require security mechanisms capable of operating in distributed environments. This paper proposes an AI-based framework for threat detection and mitigation in an architecture with a remote radio access network (RAN) over Starlink. The proposed solution integrates security tools such as Wazuh and Suricata, along with Python...

This work presents a comparative analysis between two core network solutions: the open-source platform Open5GS and the proprietary solution C2n developed by CPQD Foundation (Telecommunications Research and Development Center), considering the use of backhaul via Low Earth Orbit satellites (LEO). The evaluation is based on monitoring the signaling...

Semantic communication (SemCom) reduces communication overhead by transmitting task-relevant information instead of raw data, making it suitable for remote inference with large neural networks. We propose a semantic-aware offloading framework that combines a Vision Transformer (ViT) for semantic feature extraction with joint source-channel coding (JSCC)...

Aceleradores de partículas são instalações complexas que promovem colisões em altíssimas energias, visando à descoberta de nova física, validação de modelos fundamentais da física e aumento da precisão das medidas. Nesse contexto, sistemas de calorimetria desempenham papel fundamental ao fornecer informações acerca da energia das partículas, essencial...

This study proposes capacitive coupling circuits for broadband power line communication (PLC) that integrate pseudo-elliptic low-pass and high-pass reflectionless filters to improve impedance matching and reduce out-of-band reflections. The performance of the proposed design is evaluated against that of a PLC coupling circuit using a conventional...

Phased arrays have become a fundamental technology in modern communication systems, including millimeter-wave 5G networks and Low Earth Orbit satellite links, where radiation pattern control is essential for spectral efficiency. In this context, an optimization-based framework under explicit angular constraints is proposed for beam synthesis. Based on...

In extra-large multiple-input multiple-output (XL-MIMO) systems, users experience near-field scenarios with spherical wavefront propagation effects that provide higher spatial resolution than traditional far-field systems, which rely on plane wave assumptions. Signal detection and interference cancellation are more challenging in near-field scenarios due...