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The underwater object imaging is an important task for the surveillance and monitoring of underwater environment in a non-intrusive manner. The acoustic methods have been proved to be very powerful for the detection and localization of underwater objects. This paper proposes a new method for object imaging based on an acoustic system that uses multiple elements. The image is obtained using two main...
Positioning systems based on location fingerprinting have become an area of intense research, mainly with the aim of providing indoor localization. Many challenges arise when trying to deploy location fingerprinting to an outdoor environment. The main problem is achieving coverage of large outdoor spaces, which costs time and needs an intensive data gathering effort. This paper proposes the use of...
The signal processing techniques based on higher-order statistics are used in many applications due to their interesting properties. These techniques are very useful when the signals are affected by the gaussian noises. In this paper the higher-order moments and the moment spectra for deterministic signals are theoretically described. An analysis of the third-order statistics for some particularly...
Technology has reached the point when it is required to design a new network, 5G, that can offer efficiency, higher speeds and a converged fiber-wireless topology. It is supposed to offer high speed wireless access to the Internet by using very-wide-bandwidth radio channels for data access speeds up to 10Gb/s. Furthermore, other parameters that customers seem to need as quickly and as much are: high...
This paper presents the WiMAX- IEEE 802.16e real throughput analysis, measurement and evaluation. As throughput is a term with diverse definitions, the analysis starts from a theoretical modeling for throughput estimation in ideal radio propagation conditions, based on IEEE 802.16e standard and related works on throughput estimation. The tests were conducted using CTC (Convolutional Turbo Code) channel...
The concept of the integrated platforms has grown in the past 10 years, mostly due to the impressive evolution of technology. Thus, nowadays, the three most important services that comprise the basic elements of technology: data, voice and video; can be integrated under the same platform. The purpose of this paper is to analyze the behavior of this type of platforms, concerning interoperability level...
In this paper the authors extend the tests and model verification related to the partially overlapped channel interference in Wi-Fi communications. Recently more and more papers have investigated the side effects of the channel interference on the throughput parameter. The paper proposes a theoretical model and an experimental approach to obtain useful information regarding channel allocation and...
In this paper we propose a new approach for characterization of home appliances load signature (electrical fingerprint) from Recurrence Plot Analysis (RPA) perspective, with the goal of non-intrusive appliance load monitoring (NIALM), promoted as enabling technology to save energy consumption and to lower consumers electrical bills. In our research work, RPA is adopted as an analysis tool of non-linear...
The massive use of IEEE 802.11 networks/devices together with the technological progress on spectrum monitoring processing devices/software generate premises to search for improved techniques of mitigating the interference consequences. Many works approached co-channel and adjacent interference between IEEE 802.11/WiFi networks/devices, but few include non-WiFi interference sources, which sometimes...
According to the special literature, a major research direction to improve the performance level assigned to a pattern recognition system is to use the specific paradigms of artificial intelligence domain. Having as starting point the indubitable advantages given by GANN (Genetic Algorithm Neural Nework) system concept in solving of some concrete pattern recognition tasks, in this paper a comparative...
The paper presents an approach of the design optimization for the TAFHNET model, including cognitive features, with the focus on a secure (anonymous) routing algorithm (SECRAL). The SECRAL is offering a simpler solution with an alternative original mathematical model, aiming a balance between the highest security and the complexity cost and including scalable additional cognitive information (ACI)...
”1+1 protection” represents one of the latest methods in MPLS networks. Such method is available for premium customers and consists in traffic duplication by two different paths, in order to prevent informational link from failure. In this article, is presented the influence of this mechanism on the quality of service (QoS). The metrics which we refer are the average and standard deviation of transfer...
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