XXXV Simpósio Brasileiro de Telecomunicações e Processamento de Sinais

This paper presents a mathematical model to assess the statistical behavior of the interference produced by MF- TDMA VSAT networks into a victim link of a neighboring satellite network. In the model, analytical expressions were developed to account for the effects of the transmitting powers, antenna sizes, and transmitting antenna pointing errors....

Aerial images can provide important information for highway management. This paper presents the use of an Unmanned Aerial Vehicle (UAV) in remote sensing of highways, acquiring aerial images, and algorithms that process the images and extract specific parameters. The highway monitoring through aerial images provides a large scan area with...

This work describes a simple model for underwater acoustic (UWA) channels, taking into account Doppler effects. The performance of orthogonal frequency-division multiplexing (OFDM) systems in UWA channels is also studied. The impact of Doppler effects on OFDM transmissions is thoroughly investi- gated, and a simple two-step compensation strategy is...

The generalized frequency division multiplexing transmission technique (GFDM), is being discussed as a candidate waveform for the fifth generation wireless communication system (5G). Since it only uses one cyclic prefix (CP) per group of symbols instead of one CP per symbol, the GFDM technique is more spectrally efficient than the traditional OFDM...

This work addresses the linearization of power amplifiers for wireless communication systems through band- limited digital baseband predistortion (DPD). This work contribution is to present a comparative study between the direct and indirect learning architectures for the parameter identification of band-limited DPDs. Simulation results from a...

The generation of random numbers is a technique that has numerous applicabilities: numerical simulations for meteorological events, games, security protocols and cryptography, etc. It can be implemented physically or logically. Using the physical method, we arrive at nondeterministic entropy sources based on random or quantum physical effects....

This paper presents and compares sucessive inter- ference cancellation techniques in multicell multiuser MIMO scenario with cloud computing. In this scenario the signals are quantized with few bits. Simulations comprise flat-fading effects, AWGN noise and inter-cell interference. These techniques are evaluated through the bit-error-rate curve, with...

In this article, we address the problem of energy disaggregation that can be handled through dictionaries techni- ques where we synthesize the most representative characteristics of the signals involved to carry out the disaggregation. In our proposal, we can highlight two contributions. In the first one, we modified the steady-state identification...

Time-domain analysis of S-Parameters can be performed by converting data collected in the frequency to time domain. Although the use of the Chirp Z Transform approach, a more general Fourier transform tool, flexibilizes data acquisition, the conversion (or inversion) becomes difficult. Most existing methods approximate the Inverse Chirp Z...

Traditionally, biological signals are generated as one-dimensional arrays (even if acquired with many channels) and consequently encoded through one-dimensional techniques. Nonetheless, some researchers have addressed the encoding of biological records as two-dimensional arrays, in such a way that signal dependencies are exploited by two-dimensional...