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Dynamic spectrum sharing techniques applied in the UHF TV band have been developed to allow secondary WiFi transmission in areas with active TV users. This technique of dynamically controlling the exclusion zone enables vastly increasing secondary spectrum re-use, compared to the "TV white space" model where TV transmitters determine the exclusion zone and only "idle" channels...
The radio frequency (RF) spectrum becomes overly crowded in some indoor environments due to the high density of users and bandwidth demands. To accommodate the tremendous wireless data demands, efficient spectrum-sharing approaches are highly desired. To this end, this paper introduces a new spectrum sharing solution for indoor environments based on the usage of a reconfigurable reflect-array in the...
To provide constant channel conditions for a great deal of distributed wireless sensors, magneto-inductive (MI) propagation technique suggests an attractive facilitation of underground sensor networks (USNs) for MI-USNs. However, to put this MI method into practice, a reliable and efficient data transportation is a must to fulfill a pre-defined level of quality of service (QoS). In this paper, a complete...
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