Abstracto

Cognitive Radio Spectrum Sensing and Secondary User Allocation

Emhamed A. Adaba, Ehab H. Abdelhy, Fayez W. Zaki

The increased demand of services and applications on the wireless communication networks in the future requires wider ranges of spectrum. This enforces the designers to develop new techniques and solutions to use the scarce spectrum efficiently. One of the proposed solutions is moving to new higher frequencies, but it is observed that the licensed spectrum is not completely used where some parts are unused and others are not utilized. Cognitive radio is an intelligent technique used in wireless networks to take advantage of unused or underutilized spectrum. This may be performed by allocating secondary users in the spectrum holes in order to enhance the efficiency of radio resource allocations. In this paper; spectrum sensing methods and secondary user allocation are performed to utilize the spectrum holes. The simulation Model is carried out using Matlab simulation program in order to study the performance of the proposed cognitive radio system.