XLII Simpósio Brasileiro de Telecomunicações e Processamento de Sinais

Visando a abertura da rede e redução de custos com equipamentos, funções de rede antes implementadas em hardware estão sendo substituídas por software, conceito chamado rádio definido por software, do inglês software defined radio (SDR). Entretanto, é necessário analisar o impacto energético desse novo paradigma. Neste contexto, apresentamos uma...

Some of the envisioned 6G applications, e.g., integrated sensing and communication (ISAC), are scenario dependent, requiring physically accurate knowledge of the scenario. One envisioned solution is to use ray-tracing (RT) based channel models. In this context, this work introduces a methodology for generating scenario-dependent channel samples using RT,...

A alta mobilidade dos drones facilita o acesso a locais remotos, tornando-os valiosos para diversas aplicações em cidades inteligentes. É comum que os drones colaborem entre si e se comuniquem por meio de Redes Ad-hoc Voadoras (Flying Ad-hoc Networks - FANETs) para coleta de dados. No entanto, a cobertura eficiente de uma área pode ser desafiadora devido...

In this work an empirical computational proposal is presented for the generation of encryption keys that can be used in quantum key distribution (QKD). The proposed method combines pseudorandom number generators, chaotic map and NIST 800-22 test for randomness certification. The rate of generation of random sequences obtained in the proposed system is no...

Wireless networks are constantly evolving and sixth-generation networks are already being prepared for launch in 2030. The emergence of 6G will require networks to offer superior capabilities compared to 5G, particularly in the areas of physical (PHY) and Medium Access Control (MAC) layers, especially when considering applications such as massive MIMO...

Este trabalho visa adaptar o protocolo RPL para cenários de mobilidade através da proposta de métrica de roteamento e função objetivo novas, com as quais se objetivou prever o movimento dos nós de modo a estabelecer rotas mais estáveis. O desempenho da proposta foi comparado com o do protocolo original via simulações computacionais, baseadas em traces...

Distributed multiple-input multiple-output (D-MIMO) is a promising network technology for 5G-beyond systems due to their capability of providing better coverage and more reliable communication. In this context, several access points with small antenna arrays are spread over the coverage area to perform joint coherent transmission, possibly with...

This paper presents a wireless powered communication network (WPCN) that features a power beacon (PB) with multiple antennas for power transfer to terminals employing energy harvesting (EH). These terminals, each with a single antenna, in turn, use non-orthogonal multiple access (NOMA) to transmit their data to an access point (AP) with a single antenna,...

In the context of sixth-generation (6G) architectures, multiple input multiple output (MIMO) networks emerged with innovative proposals for the future of mobile communications with various applications. Among the many applications, the integration of uncrewed aerial vehicles (UAVs) and ground users (GUEs), combined with the multibeam technique stands...

Communication systems traditionally focus on accurately transmitting signals without considering semantic content. This paper introduces semantic communication models using pre-trained language models, T5 and BART, compared to conventional methods like Huffman and Turbo coding. Numerical results demonstrate the semantic models' superiority, especially in...