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Cognitive radios (CRs), which are capable of sensing its surrounding environment and adapting its internal parameters, have been considered in mobile ad hoc networks (MANETs). The area of security in CR-MANETs has received far less attention than other areas. However, some distinct characteristics of CRs introduce new non-trivial security risks to CR-MANETs. In this article, the authors study spectrum...
Frequency hopping/time hopping (FH/TH) sequences have found wide applications in various modern FH/TH spread spectrum communications, namely ultra-wide bandwidth radio, multi-user radar, sonar systems, wireless sensor networks, and so on. The average Hamming correlation (AHC) is an important performance indicator of the FH/TH sequences. In order to evaluate the performance of the FH/TH sequences,...
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