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This paper investigates the relevance of Channel Impulse Response (CIR) parameters for fingerprint based localization algorithm. We consider in this study a WLAN environment where a Multi-Layer Neural Network (MLNN) learns off-line the location from the location-dependent parameters of the CIR. Then, it calculates on-line the accurate position of a mobile station from given fingerprints. More importantly,...
Providing energy-fairness in multi-domain green networks is a vital but hitherto unexplored issue. In this paper, we address energy-fair routing in multi-domain green networks by formulating an optimization problem as an integer linear program. Our problem maximizes the energy saving of the domain with minimum energy saving while ensuring that the energy consumption of each domain is below a given...
The paper deals with the effects of electromagnetic (EM) wave polarization on the induced specific absorption rate (SAR) and the related temperature rise in the homogeneous human brain model. The EM dosimetry model is based on the surface integral equation (SIE) formulation, while the thermal model of the brain is based on related Pennes' heat equation for biological tissue. Higher values of peak...
Software development effort estimation is fundamental part of software project management. It is the process used to predict the most probable effort required to perform specific work. Based on forecasted effort it is possible to determine costs and allocate required resources. The effort estimation inherently includes various factors and therefore the process of decision making and producing the...
In OFDMA based LTE and LTE-A systems, cell-edge users suffer from Inter-Cell Interference (ICI). To mitigate ICI, Coordinated Multi-Point (CoMP) is proposed to improve cell-edge users' performance. In CoMP mode, base stations need to reserve same frequencies for these CoMP users. However, mobile communication network is a dynamic network. Users distribution are always changing, therefore it will be...
Energy storage technologies make the green energy more available by attenuating the problem of its intermittent generation, and then reduce carbon emissions by decreasing the use of brown energies (like those from oil and natural gas). The use of batteries in data centers and Cloud infrastructures is one of the most promising applications of energy storage. In this paper, we analyze the problem of...
Energy Efficiency (EE) has become one of the main challenges for the development of wireless communication systems. Thus, many researchers are investigating new solutions to save power. For this reason, in this paper we apply a method based on modulation and coding scheme (MCS) for multiband orthogonal frequency division multiplexing (MB-OFDM) ultra wideband (UWB) systems. The MCS scheme is a powerful...
Speech enhancement is an essential technique to process degraded audio in various applications. Beamforming to eliminate interferences based on sensor arrays is the most well-known method for this issue. However, traditional beamformers often face magnitude incoherence towards received signals due to directional weighting. Therefore, a novel dual-channel beamformer based on time-delay compensation...
In this paper, we present the design and simulated results for a patch antenna array at 2.4 GHz. The antenna consists of one linear array with six series-fed patch antennas. In radar and smart-antenna applications it is very important to use antennas with high gain and low sidelobes in order to avoid the interference and to increase the gain of antenna array. The aim of this research is to design...
Cardiovascular diseases (CVD) represent a severe cause in mortality cases over the world. Early detection and foreseeing of future developments are essential goals for every cardiologist. For this reason, detecting and understanding several factors that trigger cardiovascular diseases is essential. As we have emphasized in eProcord spreadsheets (a 3-year research project that assessed the cardiovascular...
In this paper, the earlier developed error floor model for peak performance estimation of OFDM transmission over multipath channel with small delay dispersion is enhanced by exploiting the model's feature of enabling application of arbitrary cyclic prefix length, by varying the balance between the counts of advanced and delayed echoes with respect to sampling instant. Applying this by accordingly...
Enabling a sustainable urban mobility is one of primary goals of the so-called Smart Cities vision, and the deployment of smart parking systems represents a key aspect. The proper operation of these systems heavily depends on their ability to automatically detect the presence of vehicles in the parking spaces. To date, this problem is solved by expensive wireless/wired systems. As the car presence...
In this paper, three electric equivalent models to evaluate crosstalk between three-conductor transmission lines are proposed. First, electric equivalent models for three-conductor transmission lines are presented. Secondly, rigorous equations to calculate the per-unit length inductive and capacitive parameters are developed. These models allow us to calculate crosstalk between conductors. Finally,...
This work studies the energy-minimized multi-layer operation of IP over flexible optical networks, under a dynamic traffic scenario. We extend a multi-layer connection establishment algorithm to jointly optimize the energy consumption of both IP and optical layers. We compare the performance of the proposed energy-aware multi-layer connection establishment algorithm when applied to fixed-grid MLR...
A myelinated nerve fiber, stimulated by a current generator at the fiber beginning, is modeled as a straight thin wire antenna. The model is based on the corresponding Pocklington integro-differential equation for the perfectly conducting wire in a lossy unbounded homogenous space. Pocklington integro-differential equation in the frequency domain is numerically solved by means of the Galerkin Bubnov...
Although wireless sensor networks (WSN) are mainly designed for gathering information and measuring environmental parameters, they can be effectively used to control and manage the electrical devices in the house. Thus, they become part of an intelligent and autonomous environments that can take part of the obligation of the tenant in the house. By combining the WSN with other networks such as the...
The ever growing number of smart devices connected to the Internet of Things is giving users the chance to sense data from surrounding environment and act upon it. However, interpreting raw data coming from heterogeneous sensors and applying control algorithms to actuators is not a simple task for the common end-user who wants to create applications for smart environments. For these reasons, this...
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