Analysis of power control in underlay cognitive radio

Abd Samad, Nur Eillieyin (2021) Analysis of power control in underlay cognitive radio. Project Report. Universiti Teknikal Malaysia Melaka, Melaka, Malaysia. (Submitted)

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Abstract

Frequency spectrum is important in the wireless communication industry due to the growth of the technology in the Internet of Things (IoT) and others. In maximizing the usage of vacant spectrum holes that are not used by the primary user (PU) the cognitive radio (CR) network is used by the secondary user (SU) to transmit data in the spectrum holes. In this paper, an investigation of power control which is a method to allocate the power transmission in the frequency spectrum is been done. This paper also, analysis the power control algorithm in the underlay CR network. The power control waterfilling model is implemented by following the underlay technique of the cognitive radio network. By using the energy detection in the frequency spectrum, the percentage of the spectrum hole is identified and the spectrum utilization after the power control method is implemented is also been identified. The simulation of the analysis is done in Matlab software. Lastly, in this paper analysis the comparison of spectrum utilization between overlay and underlay technique is obtained and able to conclude the underlay technique is more efficient than the overlay technique.

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