DefinePK

Abstract

Day by day the frequency spectrum became crowded and unable to provide new services to user easily. Cognitive radio (CR) is a convincing solution for solving spectral congestion issue that has the ability to sense the surroundings bands, adjust and learn to acquire best communication. In this paper, the energy detection (ED) is used to improve spectrum sensing by sensing the spectrum and decide whether there is a signal or noise. BPSK and QPSK are used as the received noisy signals to test the performance of the CR under AWGN. The simulation is done by MATLAB Simulink and Xilinx system generator then downloaded on FPGA SPARTAN 3A. The obtained results show good results as compared with the other works.