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Accuracy and precision of positioning in UWB localization system depends on the quality of clock oscillators. Usually clock frequencies in particular nodes have different offsets what influences system performance. The paper presents a method for nodes synchronization and distribution of reference time interval. Anchor nodes measure time of arrival of packets conveying reference time information....
This paper presents a target localization problem based on the time difference of arrival (TDOA) measurements by employing an improved genetic algorithm (GA) for estimation. The weighted least square (WLS) technique is applied as an efficient existing approach. The TDOA target localization problem is formulated as an optimization problem, with a highly nonlinear and multimodal objective function....
In this work, we carry out a exact performance analysis of dual-hop cooperative amplify-and-forward relaying systems in wireless body area networks over independent and non-identically distributed Gamma fading channels. In particular, we derive new exact closed-form expressions for the end-to-end outage and symbol error probabilities at arbitrary signal-to-noise-ratios (SNRs) of these systems in terms...
Improving pre-installed monitoring system for a set of Photovoltaic (PV) panels, using wireless sensor network (WNS) with embedded fuzzy controller, is our contribution in this work in order to control and detect faults within solar panels that affect considerably the energy produced by the solar panels. The new solution is to integrate the detection and classification of faults within the sensors...
This work considers the problem of target localization in a 3-D space, using coupled measurements of angle of arrival (AoA) and received signal strength (RSS). By applying the transformation from Cartesian to spherical coordinates and by taking advantage of the available AoA observations, we establish novel relationships between the measurements and the unknown target location. From these relationships,...
The cooperative operation of multiple networked sensors, due to redundant radio signal reception, allows considerable gain in AMC performance. We here present a cooperative AMC solution with centralized fusion, with suppression of mismatch reference influence through two-step classification process. A performance analysis is performed under the assumed application conditions for dispersive fading...
In this paper we consider the problem of hosting multiple applications in software-defined wireless sensor networks (SD-WSNs). The applications vary in terms of terms of the number and type of sensing tasks required. Since WSN nodes are very resource constrained, one of the major challenges when scheduling the sensing tasks is to balance the energy consumption and maximize the operational time of...
Due to the inherent limitations of the sensor nodes (SNs) and the distributed nature of information in wireless sensor networks (WSNs), energy efficient routing protocols have received significant research attention. Hierarchical routing based on clustering have been proven to be an effective method for energy-efficiency. Moreover, the presence of heterogeneous nodes with varied initial energies can...
Living conditions in any country are important, especially a local environment is more important to many people. The parameters like a noise level, light intensity, barometric pressure, carbon monoxide (CO) and carbon dioxide (CO2) concentration levels are monitored to evaluate living conditions. The mentioned reasons led to the practical realization of Wireless Unit for Environmental Monitoring (WUEM)...
The hierarchical routing protocols are considered as a suitable and energy efficient for wireless sensor networks applications that demand frequent and periodic data gathering. Many routing protocols for two-layer (single-hop), tree-layer (dual-hop) and multiple-layer (multi-hop) architectures are developed based on the hierarchical LEACH protocol. In this paper we propose a novel concept for the...
This paper presents the IHPNode platform in the context of precision farming (or Agriculture 4.0). This platform is an experimental platform for wireless sensor network (WSN) applications and can be used in precision farming as one of the most promising WSN application areas. The paper presents the requirements of the applications, the features of the IHPNode platform, as well as, the planned future...
The main goal of this paper is to present some of the most relevant work in the area of air pollution monitoring in large cities and water monitoring in rural areas. Additionally, we present our solution based on a participatory sensing approach for air pollution monitoring in large cities, and our ongoing work in the area of multi-modal WSNs for water monitoring in agricultural applications.
A review of advanced wireless sensor nodes, networks, and applications in precision agriculture has been presented. Features of several commercial and prototype sensor node platforms designed and implemented for agricultural applications have been described. Basics of sensor network protocols and topologies have been reviewed together with numerous applications. Advanced machine learning approaches...
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