Performance Analysis of Improved Technique for Optimal Frequency Spectrum Utilization Considering Energy and Eigenvalue Detectors

Recently, exponential rise in the demand of wireless communication has led to gross reduction availability frequency spectrum meet proliferation demands. Overlay and underlay cognitive radio used address this problem is characterized with poor management assigned spectrum. The basic essential mechanism Radio (CR) find unused called Spectrum Sensing. This important optimizing allocation for increasing system. Hence, paper developed an energy efficient sensing technique detection white brown space using eigenvalue detector. Based on a predefined switching algorithm, system switches between overlay approach when there presence respectively. During approach, user (CU) signal coded Code Division Multiple Access (CDMA) prevent primary users (PU) receiver from hearing CU thereby improve security CU. Also, Hybrid Decode Amplify Forward (H-DAF) cooperative relay incorporated enhance coverage area user. However, during H-DAF will be sleep mode since can transmit maximum transmitting power. received at node decoded, amplified, CDMA before forwarding receiver. compared performance two detectors by simulating algorithm MATLAB R2021a. Evaluation was based Throughput, Utilization Efficiency, Spectral Efficiency comparing Energy detector Eigen Value Keywords: Detector (ED), Eigenvalue (EVD), White Space, Brown Sensing (SS), (CDMA). DOI: 10.7176/ISDE/13-2-04 Publication date: July 31 st 2023