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Wireless communications literature is very rich with empirical studies and measurement campaigns that study the nature of the wireless propagation channel. However, despite their undoubted usefulness, many of these studies have omitted a fundamental yet key feature of the physical signal propagation, that is, wireless propagation asymmetry. This feature does not agree with the electromagnetic reciprocity...
In this paper we present the results and the assessment of a statistical analysis of the wireless sensor networks (WSN) radio channel in indoor office scenarios. The work is based on an extensive set of received signal strength (RSS) measurements collected within different typical indoor spaces and node placement scenarios. Results are compared with corresponding values from the log-distance model,...
With a performing project XH140721, exploiting the phone localization is one of the emerging technologies to improve the rescue of buried people in ruins after disasters, such as earthquakes and avalanches. As a prerequisite, the channel characteristic is necessary to study. This paper analyses wifi 2.4G radio signal propagating style. Combining the theoretical prediction and experimentally measuring...
The advent of the smartphone and its impact on manufacturing are changing the technology landscape. The cost of smartphone components has decreased drastically in recent years due to mass production. Elements that have benefited from this revolution include sensing modules. It is now reasonable to assume that advanced wireless devices are orientation aware. This, coupled with the asymmetrical radiation...
In recent years, localization using angle of arrival (AOA) has gathered more attention, due to the use of smart antenna techniques for performance improvement in mobile communications. In this paper, we propose a precise two dimensional (2-D) localization approach by using AOA measurements which considers the error due to multipath propagation as well as angle estimation error. Specifically, we propose...
As utilities convert from manual meter reading to automated systems, a new set of operation challenges arise in the day-to-day operation of the metering system. One of the most significant problems occurs when a meter is installed, but the physical location of the meter has not been properly recorded by the utilitiespsila system of record. This condition is commonly referred to as an ldquoorphanrdquo...
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