5G Cognitive Radio system design with new algorithm Asynchronous spectrum sensing

mohammed mehdi saleh, Ahmed A. Abbas Hussein, AHMED Talaat HAMMOODI


Due to the rapid increase in wireless applications and the number of users, spectrum scarcity, energy consumption and latency issues will emerge, notably in the 5G system. Cognitive radio (CR) has arisen as the primary technology to address these challenges, allowing opportunist access to the spectrum and the ability to analyze, observe and learn how to respond to environmental 5G conditions. In order to use underused frequency bands without creating unnecessary interference with legacy networks, the CR has the ability to sense the spectrum and to detect empty bands. In this paper, we presented a spectrum sensing algorithm based on energy detection that allows secondary users to transmit asynchronous with primary users without causing harmful interference. This algorithm enabled to reduce 40% of the sensing time required to scan the entire working frequency band and it possible to use large frequency bands that could reach GHz. Acoording to the BER , the secondary users beter performance cmopare with primary users.


Cognitive radio, Energy detection, Sensing time, OFDM, Fifth Generation (5G)


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DOI: https://doi.org/10.11591/eei.v10i4.2839


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