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In most applications of Ground Penetrating Radar (GPR), it is very important to combine the radar with an accurate positioning system. This allows solving errors in the localisation of buried objects, which may be generated by measurement conditions such as the soil slope, in the case of a ground-coupled GPR, and the aerial vehicle altitude, in the case of a GPR mounted on a drone or helicopter. This...
In this work, we present an enhanced version of our algorithm that can evaluate dimensions of a slot being placed within a patch surface of a rectangular microstrip antenna. While in the earlier work we were able to compute only one slot dimension, in this paper we present the computation of two slot dimensions, given the desired resonant frequency and the mode of operation. The paper discusses how...
This paper proposes low-complexity channel estimator for Unique Word (UW) MultiBand Orthogonal Frequency Division Multiplexing (MB-OFDM) based Ultra WideBand (UWB) communication systems. The proposed channel estimator is performed in two stages. The pre-FFT stage employs the Least Square (LS) estimation and smoothing technique to estimate the Channel Frequency Response (CFR). The post-FFT stage employs...
In order to achieve the annual target of energy requalification, prompted by regulations both at EU and national level, building occupants should obviously collaborate through organizational and behavioral measures related to energy consumption. LepidaSpA decided to integrate into an existing service, created to manage heterogeneous sensor networks extended to the entire territory of the Emilia Romagna...
We propose a simple modification to the progressive edge-growth (PEG) algorithm in order to control the girth of low-density parity-check (LDPC) code Tanner graphs constructed. Using the modified algorithm, the edge densities in short irregular rate-% LDPC code graphs can be increased without increasing the correlation between edges in graphs by creating cycles of undesired length. Density evolution...
The proliferation of mobile handsets has undoubtedly spurred on developers to build a large variety of applications that allow users to better exploit their powerful devices. However, running multiple sophisticated applications could result in poor performances and shortened battery lifetime. Mobile data offloading to edge cloud offers a promising solution to enhance both QoS and battery life of mobile...
A myelinated nerve fiber is modeled as a straight thin wire antenna and stimulated by a current generator at the fiber beginning. The model is based on the corresponding homogenous Pocklington integro-differential equation for the perfectly conducting wire in a lossy unbounded homogenous space, where the activated node of Ranvier is modeled as a thin wire junction with an additional current source...
This paper addresses the energy consumption minimization of a two-way amplify-and-forward (AF) relay network with imperfect statistical channel state information (CSI). First, we derive the expression of end-to-end signal-to-noise ratio (SNR) in dual-hop transmissions over independent identically distributed Rayleigh fading channels. Then, we formulate the energy optimization problem under data rate...
Sensor devices are now used at any time and every where offering ubiquitous services and leading to a new intelligent environment. This huge number of connected devices constructs a new paradigm called the internet of things (IoT). With the appearance of this new concept, requirements to define robust and scalable protocol stack are growing. Because all these devices should communicate and share the...
Efficient design of networks topologies is challenging, especially with the arrival of the virtualization in these last years. In this paper, we deal with the Capacitated Network Design Problem (CNDP) with modular link capacities to design minimum cost network while satisfying the flow demands. We propose a two levels Genetic Algorithm (GA) based model that can deal with several variations of CNDP...
The increasing demand for reliable mobile services with faster communications speed requires high capital investment in the radio access networks. This leads to enormous energy consumption, high operational costs (OPEX), and also environmental and human concerns due to electromagnetic pollution. Hence, in a multi-operator environment, selecting the most efficient strategy among operators can tackle...
The availability of 10 Gbps, 100 Gbps, and even faster networks makes it feasible to move large quantities of data over networks (i.e., as bits) rather than by shipping physical media (i.e., as atoms). Previous investigations have compared the efficiency of shipping data as atoms or bits from the perspectives of time and money, providing insights into when a budget-or time-sensitive user should prefer...
Cost effective and efficient wireless BackHaul (BH) transmissions are key factors for energy efficient network architectures and strategies on upcoming dense Access Points (AP) 5G heterogeneous environments, where rapid data volume increase and energy consumption reduction are main variables to consider. Towards this direction, we consider a heterogeneous mobile network topology with coexisting macrocellular...
Accurate estimation of RF signal spatial local mean is of crucial importance in wireless communication systems planning, design and operation, specifically in coverage planning tools, channel access and power control, handoff algorithms, etc. However, so far, no universally applicable and verified approach for calculation of relevant averaging parameters has been developed. In this paper, comprehensive...
The omnipresence of real-time communication has significantly increased in recent years. Nevertheless it is treated as any best effort traffic, regardless its vulnerability to network conditions. WebRTC allows communication between browsers and uses application layer mechanisms to assure the quality (e.g. congestion control), but would benefit from network layer mechanisms. In this paper we evaluate...
This paper presents the Geographic Information System designed to map the Historic Core of Split, Croatia. It has been developed with the scope of a student project within an innovative Conceive/Design/Implement/Operate graduate course. The paper describes the technology used to develop and implement the Geographic Information System. Different methods are used to gather the data and digitize the...
The complexity and robustness of the currently used IP telephony infrastructures requires systematic monitoring of the network against security threats, where captured incidents are often used as a source of information for further research and analytical optimization of the monitored topologies. This article presents an analysis of IP telephony security issues which were clasiffied using neural networks...
The aim of saliency object detection algorithms is to find objects in image or video which draw attention of humans at the first sight. This very popular topic in robotics and computer vision research is useful in various areas and applications like object segmentation, adaptive compression, object recognition, visual surveillance and so on. In this paper, we will explore the possibilities of using...
The use of chaos in signal processing and telecommunication in the last few years originates several results, especially in spread spectrum system, cryptography and watermarking. The aim of this paper is to exploit the features of chaos in a MIMO radar system using phase shift keying waveform and complex codes as multiple access. In previous works it has been proven that a chaotic map could generate...
The behavioral analysis of individuals is an important science, especially if it is conducted on the elderly population, aiming to prevent Mild Cognitive Impairment (MCI) and frailty problems. A fundamental aspect in this context is to explore the use of innovative technologies enabling the Internet of Things (IoT), above all sensors, to unobtrusively capture personal data for automatically recognizing...
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