September 2013
Intermediate to advanced
398 pages
14h 22m
English
Content preview from Cyber-Physical Systems
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CPS Modeling on Cognitive UAV Communications ◾ 97
8.4 Spectrum Information Distribution Theory and Application
CR needs to be very sensitive to the changes of the wireless environment. Based on this kind of
information, CR can make a smart decision automatically, and adaptively adjust the sender and
receiver side configurations that fit the CR users into the environment properly. CR users need to
sense the spectrum bands assigned to the PUs from time to time to see whether the PU has occu-
pied the channels or not. Generally, we can classify the bands into three types:
1. White channel: not used by the PUs at all
2. Gray channel: low energ ...
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