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Variation of Ionospheric Narrowband and Wideband Performance for a 12,760 km Transequatorial Link and Its Dependence on Solar and Ionospheric Activity
(MDPI, 2020-08)
The ionosphere provides a channel that is able to propagate electromagnetic waves for long-haul communications, allowing Non-Line-Of-Sight (NLOS) radio communications in the high-frequency band (HF). ...
Design of a Low-Cost Configurable Acoustic Sensor for the Rapid Development of Sound Recognition Applications
(MDPI, 2020-07)
Concerned about the noise pollution in urban environments, the European Commission (EC) has created an Environmental Noise Directive 2002/49/EC (END) requiring Member states to publish noise maps and ...
WASN-Based Day–Night Characterization of Urban Anomalous Noise Events in Narrow and Wide Streets
(MDPI, 2020-08)
In addition to air pollution, environmental noise has become one of the major hazards for citizens, being Road Traffic Noise (RTN) as its main source in urban areas. Recently, low-cost Wireless Acoustic ...
Smart Wireless Acoustic Sensor Network Design for Noise Monitoring in Smart Cities
(MDPI, 2020-08)
This Special Issue is focused on all the technologies necessary for the development of anefficient wireless acoustic sensor network, from the first stages of its design to the tests conductedduring ...
Ionospheric Narrowband and Wideband HF Soundings for Communications Purposes: A Review
(MDPI, 2020-04)
High Frequency (HF) communications through ionospheric reflection is a widely usedtechnique specifically for maritime, aeronautical, and emergency services communication withremote areas due ...
Aggregate Impact of Anomalous Noise Events on the WASN-Based Computation of Road Traffic Noise Levels in Urban and Suburban Environments
(MDPI, 2020-01)
Environmental noise can be defined as the accumulation of noise pollution caused by sounds generated by outdoor human activities, Road Traffic Noise (RTN) being the main source in urban and suburban ...