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  • Coexistence of cognitive radio based networks in tv white space 

    Authors:Karatalay, Onur
    Publisher and Date:(Kadir Has University, 2016)
    Due to increasing data rates in enhancing wireless communications RF spectrum which is one of the most crucial natural sources has become more valuable. in order to utilize the limited spectrum e_ciently and solve the scarcity problem regulatory agencies granted unlicensed networks or secondary users (SUs) access to licensed bands for wireless communication with the condition that they should not cause harmful interference to primary users (SUs). Cognitive radio (CR) technology enables devices to ...

  • Power control and multihop communication approaches for the coexistence of ieee 802.11af and iEEE 802.22 networks in tv white space 

    Authors:Ulgen, Oguz
    Publisher and Date:(Kadir Has University, 2017)
    Communication networks have been among the most important research fields of scientists in the recent years. Researches have been conducted in various different topics and contents as technology has evolved. As some new technologies become available some technologies become out of date. One of the outdated technologies in recent years is the analog TV broadcasting. With the shift from analog TV broadcasting to digital TV broadcasting the frequency bands of old analog TV broadcasting has become ...