XLI Simpósio Brasileiro de Telecomunicações e Processamento de Sinais

Este trabalho tem como objetivo a análise dos códigos polares sistemáticos e sua decodificação por cancelamento sucessivo para aplicação em Redes 5G. Para tanto, são extraídas as Taxas de Erro de Bit (BER), de palavras código com modulação BPSK, transmitidas através de um canal AWGN. Diversos comprimentos de palavras códigos foram avaliados e, o melhor...

The advent of new Internet technologies and ap- plications has increased the need for high-speed and reliable data transport. DWDM optical networks use Transmission Qua- lity (QoT) metrics, such as Generalized Signal-to-Noise Ratio (GSNR), for channel provisioning. This parameter requires computationally expensive analytical prediction. Thus, this...

Strawberries are red fruits and an excellent choice for a healthy and delicious meal. They are produced from a sweet flower and are considered an excellent source of vitamin C, vitamin A, and potassium. Strawberry production in Brazil is concentrated in the states of São Paulo, Minas Gerais, and Rio Grande do Sul. According to Embrapa, in 2016, these...

This article explores the radio signal penetration loss in the 1-6 GHz range for 5G application in masonry construction, which is a typical scenario in Brazilian households in major cities. Ten frequencies are surveyed, considering three types of obstacles: two masonry walls with different thicknesses and a wooden door. The obtained results are compared...

The complexity and vastness of the ocean make maritime monitoring a critical aspect of both national security and international trade. This paper investigates the potential of computer vision (CV) technology for monitoring maritime activity, with a particular emphasis on ship classification. The study compares various CV architectures and techniques,...

Brazil faces several challenges related to maritime monitoring, including illegal fishing, drug trafficking, oil spills, and other environmental hazards. Recent advances in Computer Vision and artificial intelligence (AI) offer new possibilities for improving the efficiency and effectiveness of maritime monitoring systems. This paper proposes a...

In Brazil, TV White Spaces (TVWS) are being regulated to mitigate spectrum scarcity. For such, transceivers must adopt a suitable waveform to comply with power constraints and out-of-band emissions. Here, we evaluate the discrete Fourier transform spread generalized frequency division multiplexing (DFT-s-GFDM) for zero forcing (ZF) receivers under...

In modern communication systems operating with Orthogonal Frequency-Division Multiplexing (OFDM), channel estimation requires minimal complexity with one-tap equalizers. However, this depends on cyclic prefixes, which must be sufficiently large to cover the channel impulse response. Conversely, the use of cyclic prefix (CP) decreases the useful...

The active inductor (AI) is a promising strategy for use in analog receiver filters applied to aerospace devices, as it occupies a smaller silicon area. This paper presents the preliminary design of an AI implemented in a 65-nm CMOS process, which obtained an L of 14.97~nH with a quality factor of 3.7. It was employed to implement an L-C band-pass filter...

This paper presents an energy consumption analysis of a SIMCom SIM7020 module, which is applied to an ultrasonic level measurement device. The study focuses on measuring the module's energy consumption during data transmission via NBIoT, considering different sizes and number of transmitted packets. The MQTT protocol was used to transfer data to an...