Simulation and Analysis of the OFDM Transceiver Based Commutation System

As a result of the increase in wireless applications, this led to a spectrum problem, which was often a significant restriction. However, a wide bandwidth (more than twothirds of the available) remains wasted due to inappropriate usage. As a consequence, the quality of the service of the system was impacted. This problem was resolved by using cognitive radio that provides opportunistic sharing or utilization of the spectrum. This paper analyzes the performance of the cognitive radio spectrum sensing algorithm for the energy detector, which implemented by using a MATLAB Mfile version (2018b). The signal to noise ratio SNR vs. Pd probability of detection for OFDM and SNR vs. BER with CP cyclic prefix with energy detector is calculated and analyzed. In this paper, the proposed work produces more accurate results compared to the existing techniques at low SNR values. Keyword : OFDM, CR, ED, Spectrum Sensing, CP. ةاكاحم ليلحتو ىلع تلااصتلاا ماظن زاهج لاسرلإا لابقتسلااو ةفعاضمل مسق ددرتلا دماعتملا .د ةزمح مظاك صلاخا لضانم جيرا ةثحاب دعاسم ذاتسا ايجولونكت ةعماج – ايجولونكت ةعماج مظنو ةرطيس ةسدنه مسق – مظنو ةرطيس ةسدنه مسق