Abstract
In communication systems, cognitive radio networks have a important to meet the demand for free frequency band. The most important issue in cognitive radio networks is to accurately detect the empty spectrum and to prevent the interference between the licensed user and the unlicensed user. With the new communication systems that will be used in the coming years, the use of UAVs in communication systems will gain great importance. In this study, we propose and analyze a cognitive multi UAV communication model. In this model, we first determine the empty spectrums by using spectrum sensing methods. Afterwards, with the aid of dynamic spectrum access, the empty spectrums will be shared with the secondary users without causing any interfering to the primary users. Finally, fast and reliable communication is provided with UAVs and the outage probability performance of the overall system is obtained.
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