Results 221 to 230 of about 216,240 (267)

Cognitive radio networks

IEEE Vehicular Technology Magazine, 2009
In this article, we are interested in an important paradigm of secondary systems known as cognitive radio (CR) networks where the secondary terminals are envisioned to be capable of sensing and reasoning about the operating radio environments and thereby autonomously adjusting their transceiver parameters to exploit the underutilized radio resources in
Xuemin Hong   +4 more
openaire   +4 more sources

On cognitive processes in cognitive radio networks

Wireless Networks, 2013
In this article we model the cognitive processes and evaluate their impact on the performance of cognitive radio networks (CRN). Operation of the cognitive radio nodes, can be characterized by two types of processes: communication processes such as packets transmission, and cognitive processes such as estimation of the network state and decision-making
Boris Oklander, Moshe Sidi
openaire   +1 more source

Cooperation in Cognitive Radio Networks

2014 Brazilian Symposium on Computer Networks and Distributed Systems, 2014
The operation of cognitive radio (CR) networks involves opportunistic access to the spectrum licensed to primary users (PUs) by secondary users (SUs). Traditionally, this access is performed in such a way that the PUs suffer minimal interference to their access to the spectrum, trying to make the SUs as transparent as possible to PUs.
Pedro Smith Coutinho   +2 more
openaire   +1 more source

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