XXXI Simpósio Brasileiro de Telecomunicações

Zelmann Strobel Penze ,Renato Baldini Filho

This paper presents a method to automate the object counting in Neubauer chambers. The proposed technique employs digital image processing to isolate the chamber grid markings and to identify each region of interest, which, in turn, enables the ability to perform the automatic counting for each region using the method that best suits the problem at...

Video traffic increase in mobile networks, impose new requirements in terms of bitrate and delay. LTE technology appears capable of facing this demand challenges. However, given the inherent nature of the mobile networks, the devices located at the cell’s edge face difficulties to achieve the required SINR. To overcome this issue, LTE Advanced...

Many social, biological and information systems can be described through complex network models. Complex networks display common structural features, such as the smallworld and scale-free properties. However, nodes in these networks may not cooperate with each other, presenting a selfish behavior to preserve their resources. Furthermore, the presence...

This paper discusses a preliminary analysis, based on computer simulations, of the sparse representation of power line communications (PLC) channels. Additionally, it exams the possibility of reducing the number of pilots in OFDM signals when compressive sensing (CS) techniques are applied to estimate such channels. The attained results suggest that...

When several satellite communication systems share the same frequency band, each system operates under the aggregate interference generated by the others. In this interfering environment, interference calculation procedures in which worstcase situations and simplifying assumptions are considered are commonly used. Given that the geoestationary...

The use of gestationary, allowed for a large development in long distance communications and broadcasting. Since the geostationary satellite orbit (GSO) is limited resource, there is motivation for a priori planning of the use of this resource so that access to the GSO is guaranteed to all countries. These a priori planning involve studies, analysis...

In this paper it is described a strategy to control devices as a water pump and to monitor sensor states away using Arduino platform with a Bluetooth module. Systems based on this methodology can be employed in residential and industrial automation applications, among others

The effect of variation in the state of polarization (SOP) in the non coherent signals modulated by OOK 40Gbps was considered in this work to estimate the OSNR through polarization diversity and digital signal processing technique. Through a characterization of this effect, its influence is compensated and a high accuracy is achieved for OSNR monitoring

Traditional temporal video alignment techniques depend on the existence of a sufficient number of mutual scene characteristics to perform temporal synchronization. However, for video sequences originating from different spectral modalities such information may fail to exist, subsequently leading to unreliable alignment results. In this work, a...