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As research interest in the Internet of Things continue to grow, concerns are raised regarding potential limitations of the current body of knowledge on performance engineering for wireless links. Best practices in this thematic area have insofar largely been focused on human-to-human communications (e.g., wide area cellular wireless networks) and traffic patterns emerging from human actions (e.g...
Extensive research has been conducted on unmanned ground vehicles (UGVs), used for critical applications, such as military or search and rescue operations. As all those unmanned vehicles use wireless communications due to mobility constraints, it is therefore important to further define the limits of high reliability communication links in operational environments. The practical importance of this...
A self-calibrating wireless sensor network (WSN) of radiometers designed to detect PD radiation is proposed as a low-cost approach to real-time condition monitoring, asset management and operational optimization in the future smart grid. The principles of the proposed PD WSN are described in detail. Some early progress in the development of subsystems for a proof-of-principle prototype is also presented.
The work summarises a study of the data communications requirements for agricultural livestock monitoring applications using wireless sensor networks (WSNs). Several design challenges are identified and analysed in depth based on actual global positioning system positioning data gathered from an actual herd of cattle. A wireless system including antennae diversity together with data downloads optimisation...
Transmission loss measurements between a grid of hypothetical WSN node locations on the surface of a gas turbine engine are reported for eight frequencies at 1 GHz intervals in the frequency range 3.0 to 11.0 GHz. An empirical transmission loss model is derived from the measurements. The model is incorporated into an existing system channel model implemented using Simulink as part of a wider project...
A narrowband channel model (2.4 GHz to 2.5 GHz) for wireless sensors deployed over the external surfaces of a gas turbine engine is reported. The model is empirical and based on a series of transmission loss measurements over the surface of a gas turbine engine.
In recent years, wireless sensor networks (WSN) have received considerable attention within agriculture and farming as a means to reduce operational costs and enhance animal health care. This paper examines the application of WSNs to livestock monitoring and the issues related to hardware realization. The core of this study is to overcome the aforementioned drawbacks by using alternative cheap, low...
Wireless sensor networks are widely used for condition monitoring applications. Much effort has been invested in improving the performance of such networks. Diversity is a well-proven technique in this context. Here, we present the practical application of base station and antenna diversity. Empirical measurements of performance in a realistic environment are reported and a statistical analysis of...
Antenna characteristics and propagation are of fundamental importance to the coverage, capacity and service quality of all wireless communication systems. This paper presents short-range narrowband propagation measurements at 2.445 GHz for sensor network applications in an indoor environment. The effect of sensor node location on a wall has been determined for a pair of linearly polarised rectaxial...
A characterization of the short range (< 100 cm) narrowband wireless channel is presented, appropriate to a dense network of wireless transceivers operating in the 2.4 GHz ISM band. Transmission loss measurements have been made in vertical and horizontal polarisations using rectaxial antennas for a range of antenna heights and separation distances. A preliminary interpretation of the results suggests...
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